Review Of The Rochester Quadrajet - The Most Common 4 Barrel On Earth

We can't do any sort of carburetor video without someone bringing up the legendary Q-jet.
Here's our thoughts on the carb, it's good and bad points, and how its major flaw led to the creation of the Carter Thermoquad.
#classiccar #musclecar #engines
MERCHANDISE:
Get Your UTG T-Shirts Here: uncletonysgarage.com/product/...
Get Your UTG Stickers Here: uncletonysgarage.com/product/...
OUR STORE: uncletonysgarage.com
*SOCIAL MEDIA:
Facebook: / uncletonysgarage1

[@buick1955]

Very reliable carburetor. No 4 BBL sounds better kicking the secondaries in !

[@jorda.2412]

With the air filter cap flipped.

[@clembob8004]

The Thermoquad makes a similar sound. I really like the T-Quad, but the Q-Jet is a good carb too.

[@Ecosse57]

it's the sound of any spreadbore. sounds great.

[@felisconcolor1112]

Indeed: when those storm drain secondaries opened, you understood "Big & Littles" wasn't just referring to Pro-Street tire stagger.

[@cammontreuil7509]

Only sounds fast.

[@chrisfreemesser5707]

The Rochester QuadraJet is the greatest carb ever made. The fact that I'm a lifelong resident of Rochester and live maybe 10 miles from where they were made has nothing...NOTHING...to do with it 🤣

[@johnsheetz6639]

I was born in the same small town as Larry Bird.you can't tell me he was'nt the greatest man to touch the leather of a basketball so I completely understand where you're coming from! 😆

[@bcubed72]

@@johnsheetz6639 Ah. "The hick from French Lick." Helluva player.

[@edge2sword186]

Living in Rochester and hot rodding peoples cars you hsd to know the cure for the Quadra jet bog. Take the top off and remove the internal parts look at where you can remove part of the wsll inside of the carb to hold more gas and eliminate the bog . FORD used those carbs on the 429 CJ and Boss 351 without any problems and those original carbs are worth real big bucks .

[@johnsheetz6639]

@@bcubed72 that's what I'm saying! Lol! Thank you for the reply! how many cubes? Your name peaked my interest!

[@428eliminator3]

Is the Quadrajet a drink they serve at the Wintonaire yet? 😉

[@pontiacattack249]

As VGG once said. The people who don't like Quadrojets don't know how to tune them.

[@thefinalroman]

Trash carb. They never ran right only fools take em out the trash and praise them.

[@bbb462cid]

The Qjet. Hated by millions who never had a Qjet set up correctly. Hearing the four barrel working through functional arm air is muscle car bliss.

[@dangeary2134]

I always loved the deep-throated sound that came when you jammed that gas and the car would leap forward!

[@bbb462cid]

@@dangeary2134 BWHHAAAAAAAAAAAAAAAAA

[@dennisp.2147]

This.

[@billthompson5644]

The only reason it makes that noise is because it has big secondaries and it is all vacuum when they open up I absolutely hate quadrajunks. They're almost as bad as the Carter thermoquad.

[@bbb462cid]

@@billthompson5644 so you agree it makes that noise. Thank you for verifying that your internet connection works Bill.

[@rick-kx7gy]

Rebuilt hundreds of " Quadrajunks " during my 49 year wrench career . About their only real problem was often overlooked - the wallowed out primary shaft hole in the throttle plate creating huge vacuum loss . Aftermarket bushings were a simple fix .

[@johac7637]

You nailed it, been down that road on all my Q Gets.

[@chuckpratt447]

Yeah it makes the idle go up and down

[@kingcosworth2643]

Also the secondary air valves sticking because the top plate has been bent due to overtightening. Creating that Quadrajet 'bog' when the secondaries open.

[@shanecarender9051]

And the soldered plugs under the bowl that were prone to leaking causing the common run-on or 'dieseling' issue.

[@chuckpratt447]

As usual easy fix

[@ShadeTreeKennyT]

The best thing about a Q-jet was that they always worked. As long as you kept them clean, they were trouble free.

[@robinluck2922]

And no denying that sound when you opened up thoes secondaries!!

[@ShadeTreeKennyT]

@@robinluck2922 for sure! 👌

[@randymagnum143]

Carry a clothes pin.

[@dangeary2134]

They were easy to clean the jets, too. I simply pinched the fuel line to drain the float bowl while it was running. Shut it down, and then take the spray can of carb cleaner and fill the float bowl with it. Run it until the bowl was empty again. Let the fuel line go, and they would run like a top!

[@dangeary2134]

Does anyone remember how we used to pour a bit of water into the primaries to loosen the rings, then a bit of ATF to clean the valves?

[@7t2z28]

Quadrajet, the finest carburetor ever made. The haters don't understand how to tune them, and that will make you hate it.

[@johnsheetz6639]

I think most of people hating ran bad gas through them. Or had a square borentake they bought. It doesn't require much to go fast back in the day open Element air cleaner headers and a napa cam although the days I seen that stuff was the '80s don't sleep on the 305 you can catch some mid 14s with a good gear. On the peg leg too!

[@truckerkevthepaidtourist]

Well it's just like the Carter Thermo bog if you don't know how to set it right or watch out for that plastic float breaking it's going to give you nothing but trouble

[@peters8758]

@@truckerkevthepaidtourist ThermoQuad float issues? I tried & tried but the dipstick in my freshly rebuilt 340 always smelled like gas, and the highway mileage with it was appalling (3.55 posi rear end)

[@truckerkevthepaidtourist]

@@peters8758 yeah you have to find someone that really really knows them and has run them for years to rebuild them properly and set

[@thefinalroman]

Trash carb that leaves u stranded or on fire.

[@paulhellwig8120]

Worked at a cad/ olds dealership had an old mechanic that replaced several a week! I snagged everyone I could pulled apart, had all sizes of jets, metering rods primary and sec. Different power valve springs ! Loved the carb in a 350 I built in a 3/4 ton pickup never a bog or stumble start to a pegged speedo. Lot of part switching at first but boy did it work great. Thanks Tony. God Bless.

[@troymecey]

My 86 GMC came with a 4.3 V6 , 3 speed on the column and non electronic Qjet. Switched the engine/trans to a 350/350 , then a Vortec 305/350th. All I've done to the Qjet is to rebuild and replace the throttle shaft bushings. I've always said- Qjet for every day driving/fuel mileage and a Holley for performance.

[@eddieb4227]

I still go to the wrecking yards and pull metering rods and hangers.

[@brianjones5117]

Honestly as a kid I was the little jerk at the junk yards taking all the q-jet parts I could fit in my pocket.

[@eddieb4227]

@@brianjones5117 sitting here laughing because we filled our pockets with everything. One time we wrapped a shift cable around inside our clothes.

[@brianjones5117]

@@eddieb4227 i know huh I mean we didn’t have a ton of cash as teenagers and the parts were everywhere. Besides the junkyard more than made up the difference in overcharging on other parts

[@squirt.mcgirt]

The biggest problem with the Quadrajet for hot rodders is that each one was factory tailored to whatever application it was going on. Engine displacement, auto or manual transmission, sea level or high altitude, all of these parameters were factory set and you have to really dig in and sometimes make permanent modifications to get it tuned properly for a non-factory application. Once you learn how to do it there's no turning back.

[@brianjones5117]

Nah that isn’t a problem if you have a small block and are increasing the performance by add cam, headers, intake and head work.. just look for the right carb.. big block carbs can flow 740-780 cfm. Collect your jets and metering rods.. they are very easy to make work for even higher flow usages as long as you aren’t trying for 500 HP.. I have a 350 that I built in 1989 that was in my 1970 Monte Carlo..since given it to my son for his 70 GMC but it made on the dyno back in the day 327HP and 410 ft Lbs of torque.. with 492 heads mildly worked, performer intake and 272H Comp cams cam, hooker super comp headers. The carb is off a 1969 Pontiac 400 and honestly I don’t know the metering rods and jets anymore but we played with them till we got it dialed in to run the best and and perform the best.. I made a extra money by rebuilding them while in college so I had every possible metering rod and jet available and multiple bodies.. other than that you refurbish the the shafts and springs clean up the air flow off the butterfly’s a little and nothing but goodness

[@robinluck2922]

A guy around Cincinnati (my stomping grounds) became a local legend for his ability to understand that and rework these carbs!

[@rustyaxelrod]

@@robinluck2922 - I was a young car nut from Eaton back in the mid ‘70’s thru the early ‘80’s. My dad got me a copy of the Holly performance carb book and it clicked for me. I’m sure I’m not the guy you are talkin about but man, I worked on a ton of theses things back in the day. Many people at the time felt like carbs were magic and didn’t have the understanding, patience or tools to work with so I made a few bucks and often swapped parts for work on these things. Sometimes I missed out on hanging out with my friends because I had too many “jobs” on the bench. There is a little more to say on the subject but Uncle Tony is right on with what he’s saying in this video. 👍

[@chuckpratt447]

Those are the easiest carburetors to work on and to figure out I like those carburetors I worked on those carburetors for 30 years

[@BuzzLOLOL]

GM had a hard time getting the new EFI to work as well as a Q-Jet... and EFI still isn't as reliable...

[@benji7001]

my buddy had 85 monte carlo SS and yes I know it did not have lot horsepower compare to today cars but when the four barrel open is when the magic happened. Brings back great memories of late 80's . Thanks

[@stevenbelue5496]

I had 84 and 88 SS's bucket seats but my buddy had an 88 SS with a bench seat and colomn shift and man I loved that bench seat. I've looked for another SS with a bench but they must be rare. Love Qjets never understood why people hated them. That baawaaa sound was awesome to hear. I just traded for a couple and one bop.

[@timothyroatenberry1274]

Opened those things up, loved the " moan " when that 4 barrel come in ! 👍

[@edhaier5281]

My 86 SS was gutless until I found the secondary spring was too tight. A little bit of screw tweaking to the limit - no bog just sweet waaaaahhhh!!!

[@thefinalroman]

If it works. Which it won't...

[@jimbo9357]

I had one on a 84 Z28 perfectly matched to the car. Ran like a top. Hit the gas thing would jump. Secondaries would open........

[@billybobholcomb8768]

As a life long fan of the Q jet I must confess my sins here. I have plugged those two holes that Tony mentioned with Bazooka joe bubble gum. I was just trying to get back on the road and drove on that carb for 5 or 6 months before selling the car. 2 owners later it got a Holley because that kid thought it was an upgrade. I should have bought that Q jet back.

[@felisconcolor1112]

Having fixed a shattered transmission shift linkage in a GLH Turbo using nothing more than a long shoelace - and then not installing the new shift rods for 2 years because I'm a lazy bum - I salute your field expedient repair work. Sometimes you just gotta go with what you know.

[@BuzzLOLOL]

Yeah, everybody replacing that unknown size Q-Jet with a big 550 CFM Carter AFB or Holley 4 BBL...

[@abelq8008]

Qjets are the best and whoever disagrees smells like Brussel sprouts.

[@relativeunkown6881]

To think the quadrajet has been “out” of production longer than its entire run of 21 years lol… man time flys! Still the best street carb.. especially when it comes to weather up in Canada where I’m from.. still use a edelbrock rpm 1910 quadrajet on my big block 67 Chevelle, got sick of sticking floats, crappy gas mileage in the Holley’s not to mention the constant tuning whenever the temp started changing!

[@RoofysGarage]

Actually he slightly erred. The Q-jet was first introduced in 1965 for the big block Chevys, and went out of production with the end of the 1990 model year Olds 307 engines.

[@flinch622]

Noting how most drive, a typical square bore 4 barrel sees something odd regarding street use: the 40-60% throttle range is darn near a dead band: people are either cruising or passing. The q-jet pretty near eliminates that regarding primaries.

[@jeep2nv92]

I started working on cars at a GM dealership right out of high school in 1995. We used to rebuild these all the time. They were still very common on the road in the mid 90’s. I would say at least one a week average. The well plugs were VERY common issue we seen.

[@KalashZikov]

I have one in my 87 El Camino, a California-compliant one. It’s currently hemorrhaging gas, do you know if they are an expensive fix, like more expensive than a regular one. I think I remember being told it was computer controlled.

[@jeep2nv92]

@@KalashZikov I honestly don’t know how much they cost to rebuild nowadays. Yes yours I’m sure has a TPS sensor and a metering rod solenoid. It has been soooo long since I’ve even seen one of these carbs.

[@johnsheetz6639]

Most regular car guys that didn't have a muscle car had these quadrajets. Other than that choked out two barrels from the '70s man they weren't super impressive but for the day if you snatch it down first and it sings it's song much more impressive than the 301 Pontiac 2 barrel your friend had hell glass packs off the y-pipe for effect cause you bought the car for $500 and you can bragged your friend it goes 45 in 1st cause it had 256 malaise gears!

[@KalashZikov]

Thanks N8

[@blackhawk7r221]

You can get a kit for $40 and easily do it yourself with a few KZbin videos.

[@CompleteToiletGarage]

1990 was the last year of the quadrajet... on an olds 307 in a 1990 olds custom cruiser wagon, albit it was an electronically controlled quadrajet

[@motored6089]

Correct; the 1990 Cadillac Brougham had a Quadrajet as an option also on the 307 motor but I think the fuel-injected 350 was a more popular option.

[@donaldfrederick1557]

I rebuilt one. First time for a 1968 Toronado. Followed the instruction sheet and that car ran like a champ. Even the choke was perfect. Great carb.

[@christophersanders5007]

One of the things that separates the Q-jet from other carbs is the off-idle circuit. All other carbs only have idle, main, and four barrel. The Q-jet offers a fourth circuit...idle, off idle, main, and four barrel. Another known problem that old Q-jets have is worn throttle shaft. A worn throttle shaft causes vacuum leaks, and the throttle primaries to hang up.

[@TheChopperUnderground]

Worn throttle shafts and leaking well plugs!

[@Comet-hn3gm]

All true. However, very fixable. I have done many of them with great results. I am in the the camp that loves them.

[@ShawnD1027]

"All other carbs only have idle, main, and four barrel." Ignoring the "four barrel" part, what you're claiming is that all other carbs only have idle and main. That's not correct. Others have an "off idle" circuit as well, the Dellorto DLRA being one of them. In fact, the DLRA off-idle circuit has its own jet, so the carb can be tuned for idle with the mixture screw, off-idle with the idle jet, and main with the main jet and an "air correction" jet (an air bleed).

[@archieguitarz4700]

Thermoquads have an off-idle circuit as well. A couple years ago my 72 Charger developed an off idle stumble, turned out the jets used for the transition were not getting fuel.

[@christophersanders5007]

@@ShawnD1027 As soon as you saw my post you probably did two hours of research to find some obscure brand of carburetor that had an off-idle circuit just so you could say I was wrong.

[@squirt.mcgirt]

Cliff's High Performance is a great resource for Qjet building for the average hot rodder. If you call them you can likely speak to Cliff himself and he can give you a reasonable guess as to what rod and jet size you'll need, as well as how to drill out the idle passages to "resize" a Qjet for a higher performance application (making a factory 305 carb idle properly on top of a hot rodded 350 or 403 for example)

[@wti70]

Great guy Cliff. He did my Pontiac 455 Quadrajet. Thanks cliff

[@SpecialAgentJamesAki]

I have his qjet book it’s awesome

[@RoofysGarage]

Hes done 2 for me! And definitely the best! It helps that im less than an hour away from his shop, so its a short trip if i ever need parts or repairs.

[@scottl5910]

He helped guide me with rebuilding and tuning my electronic qjet on my 383 Chevy in a 88 caprice. Runs awesome

[@djr98686]

Another vote for Cliff. My boat I just sold had twin Crusader (350 c.i. Chevy) engines with Quadrajets. Cliff knows the special requirements of marine engines and did a fantastic job of rebuilding and getting them dialed in.

[@mostlyoldparts]

The adjustability and the ease of maintenance on the QJ are its strong points.... along with great part throttle fuel atomization. As stated, the fuel bowl area leaves a lot to be desired, but on a small-cubic inch V8, these things were amazing. Lots of torque, great throttle response and, when the urge to pass somebody hit your right foot, they got up and flew. Great review!

[@modelnutty6503]

great for a DD, riser setup helps AND isolates from intake manifold heat. its always been an easy inexpensive kit. more air flow under the air cleaner with the carburetor and fuel line an inch higher, common sense simple.

[@jeffwombold9167]

I had boxes of these years ago, I learned a lot of the tricks to them and with several tweaks and small modifications I had very good results from them. The most misunderstood thing was one you learned how to work with them, they remained set, whereas Holleys you had to fart with anytime the conditions changed. They could actually be very hot carbs once you figured them out.

[@mastertek383]

Back in my days of wheelin trucks, the QJ was the ONLY carb that wouldn't flood out in nasty off camber situations. The right would have to be almost on it's side to flood the QJ.

[@gibbyrockerhunter]

My 85 Elcamino at one point had the HO intake and Quadrajet pack. It wasn’t anything too hot, but was definitely more fun then most daily’s. I found a cheap edelbrock 650, rejected it to match and it was great. Much more lower end and a nice response all the through. It was a little more thirsty then before but that was obvious and didn’t matter much. Then I made 3x my money back selling that one, bought a new proper sized Holly. It took a lot longer to find the sweet spot between everything, felt similar to the edelbrock de tuned, and was just a little better on fuel. But once I got familiar with tuning it, it became second nature. Although anytime I would be driving through states, to the ocean, or over about 1,500 feet from last mixture adjustment I would always end up tweaking it at the fuel station or pretty view. It the time I didn’t mind it al all. Getting under Emily’s bonnet was never a bad thing.

[@Joesmusclecargarage]

The QuadraJet is without a doubt an excellent carb. They do make strip kits for them, and the fuel delivery issue as a result of the incredibly small bowl can be helped by what you mentioned; different size/shape floats, bowl contouring, as well as larger orifice seats, and windowed seats. I ran deep 11s with a 69 Nova street car, very mild pump gas 454 and a 4-speed, with a HV pump, and a larger/windowed needle/seat. Never nosed over once, and was as responsive as EFI I also have over 2 dozen Thermoquads in my “collection”, most of them being the early 6xxx series, and two aftermarket SuperQuads. All are excellent carbs. 👍

[@silkysixx]

My 1973 Pontiac 400 had a phenolic spacer under the carby and never had vapor lock. The Quadrajet is the center of the famous story of the Pontiac that hated vanilla ice cream. A classic.

[@BIILLETT]

Quite possibly the best carburetors ever made. An engineering marvel!!

[@davidclark7584]

I had one off a Cadillac 500 on my 11 to 1 purple cam 440. Ran awesome excellent throttle response and gobs of power. No adjustments just bolted it on.

[@johngault7329]

My buddy used to rebuild these for fun. He would buy them from salvage yards and rebuild them, then put them on his shelf. His dad taught him the tricks to them. He put them on all of his vehicles. My favorite ones were on his 455 Buick, and 455 olds. The sound they made was awesome. Sounded like the hood was going to be sucked into the motor. The memories of that sound as he rolled past 5.0 mustangs with his 850 cfm sounding off will always be with me. I always considered them to be the 1911 of the carburators. To many parts for the average Joe to break down and rebuild, but incredible anyway..

[@eddieb4227]

I have a 66 toro with a 69 455 that has been tweeked here and there. The rice burners get spanked bad! Wish I had kept the 66 trans since it had 3.21 gears Compared to the 3.01's of the 69.

[@TheBandeeto]

Love the dog doing laps around the house!

[@The_BIG_salad]

Lol. It's all I see now

[@eviljoker303]

Never had a problem with the Quadrajet aka the “QuadraJunk”.Great cruising carb when tuned right

[@cammontreuil7509]

All carbs are good when tuned right.

[@randymagnum143]

@@cammontreuil7509 no. The electronic feedback Rochester stuff was trash. Tbh, all Rochester stuff is trash. But some of it can be made to work OK.

[@thefinalroman]

Junk carb period. Had 10+ cars with that POS carb and they got 5mpg when they weren't broken down or on fire...

[@jimbrown563]

I'm a Q-Jet fan from way back ...... The reason that people either love or hate the Q-Jet is because there is an automatic tendency for people to blame the part that they understand the least as the reason for ALL of their problems. I built several 500+ hp Engines back in the mid-'80's. That's right ....... a Q-Jet, on a 2" Open-Spacer/Adapter, on a Victor-Jr. , 20+ MPG Highway, with 411 Gears no less, ( running ~13:1 Compression ), it can certainly be done, but not with a "Controlled-Leak" Holley. But times change .......... Now I use MegaSquirt Computers, and I'm still using them ~30-years later. I built my first MS from a Build-it-Yourself-Kit. . . .

[@anthonyperna2716]

Tony I'm a huge Q jet fan. I love the way they drive on the street, the sound they make when they're floored, and the snap off the line those tiny pimarys create. Have you ever read Cliff Ruggles book it's actually really good about getting quadrajets set up for high performance. One thing that really worked for me was adding an electric fuel pump because the mechanical pump couldn't keep the bowl full at wide open throttle. Also Victor Reinz makes a thick gasket that actually helps keep a little bit of heat out of the carburetor. And they're actually application specific because I think there's two different gaskets for Quadra Jets and it has something to do with the little notch on the primaries. Also they redesigned the Quadrajet in like 71 or 72 when they went to that shorter Quadrajet. I wonder if that was something to try to fix all the vapor lock issues you were talking about. I don't know why but I could never get the Holley Spread Bores to feel as good as the real Q Jet they were always very soft off the line.

[@jasonrackawack9369]

I had an issue with a big cam 455 pontiac sucking the bowl dry at highway speeds it would start stuttering and starving for gas, let off a bit and it was fine lol......I ran bigger diameter lines, a larger fuel filter instead of the small one in the carb and a high volume mechanical pump and it was ok after that. Cliff's book is terriffic.

[@bradleysmith2021]

I used to love it after a rebuild when the owner drove it for the first time…I’d set it up so the secondaries and the downshift hit at the same time. A strong stock engine could bark the tires. Saw a LOT of really wide eyes!

[@basilcarroll9729]

There were a few quadrajets in 1965, they were on most GM four barrel engines in 1966.The last was a 1990 Olds 307. Carter also made some quadrajets for GM. They look identical to the Rochester.

[@JohnReall]

My 69 Camaro had a Carter Quadrajet on it from the factory.

[@FerdinandAkin]

My 1970 Pontiac Grand Prix had a Carter Quadrajet.

[@tacoheadmakenzie9311]

The first engine that came with one was the 396 when it debuted in '65.

[@briancarsen6315]

Indeed carter made quadrajet carbs as well. My 1973 impala had a stock 350 with factory dual exhaust and a CARTER quadrajet. Great running car. Miss that car.

[@davidpaul5465]

Tony: On February 15, 1967 my father took delivery of new Pontiac Catalina. Stalling issues were addressed by Allison Pontiac, RIP, with the warning not to use "Shell" gasoline. The problem, as you indicated, faded away. Thanks, for the trip down memory lane.

[@allenapplegate1525]

Q-Jet first used on the new for 1965 L35 396/325hp V8. 1966 saw an expansion across the GM lines, but not full use.

[@IROC400]

Quadrajet is poor man's fuel injection. My K5s love them! I was stuck in a hole at 45°, and the quadrajet didn't miss a lick for an hour until I got the winch to reach something that would hold.

[@michaeldose2041]

I am an off road guy. What I can tell you is the Q jet is hands down the best off road carb out there. The reason it works so well is the exact reason UTG cites as a disadvantage. That is, it's small float bowl. When you are off throttle, even a small amount of gas spilling into the manifold would kill the engine. Off camber would starve the engine. Imagine moving down a steep, ruff incline at idle. With a Holly and it's comparatively gianormus float bowls gas can just spill through the main jets, put the fire out in a heartbeat. On throttle on woops you could hear the engine sputter and the tell-tale puff of black smoke. Holly recognized the problem and made accessories, which I dutifully installed, but never really solved the problem. Power brakes and steering are compromised at the worst possible moment. I rolled my jeep onto its roof and my Q-Jet was STILL RUNNING. I actually had to reach up and turn off the ignition. Loved the Q-Jet, next best thing to Fuel Injection, which is what I have now.

[@heavymetalmadness666]

If your off roading to those extremes grow up and put EFI on it. It is about as cheap as the carb and proper tuning.

[@heavymetalmadness666]

I'm kind of thinking I went the wrong way on my car with a junk carb from hell.

[@michaeldose2041]

@@heavymetalmadness666 Apparently you didn't read my post. My 4X4s are all equipped with FI now. I've been off roading since the seventies, before fuel injection was even a thing. Here's a little advice that you didn't ask for, you're better off to stay silent and be thought a fool rather than open your mouth and remove all doubt. Oh, and another thing, I learned back in the sixties. Back then, they actually taught kids stuff in school. For example, I learned the difference between you're and your, you should look into it.

[@disgruntledmarmotcustomsan1530]

Got my father in laws 76 Ramcharger, equipped with a quadrajet, running today after sitting 10 years. Runs like the day it was parked.

[@gregorydavid7755]

I have a 1972 C10 Pickup which had its original 350 engine with the QJet 4bbl carb. Over the last few years a knowledgeable friend who has built many Chevy engines built a 30 over 400 small block for me which will has about 325/350 HP and 400/425 ft lbs of torque. When starting the build I asked if we should get a Edelbrock carb, as the QJet has 91000 miles, for the new engine and he said no reason as the QJet is all we need and he was going to rebuild it which he did. He said people do not understand them and they are a great carb. My engine and the rebuilt QJet are working well together.

[@Trains-With-Shane]

The best street driving carbs i've ever owned were, and still are, quadrajets. One of mine has developed the well plug issue. a few years ago it was very slow and would only leak out over the course of a few days. Now it leaks down in less than a few hours. Need to pull it off and fix it. I should probably send it off and have it rebuild because it's leaking air through the throttle shaft. Guess even the great quadrajet isn't susceptible to age with this example being 43 years old without ever being rebuilt. I think a large contribution to their lack of prevalence in performance applications, in addition to bowl size, is the lack of quick tunability. Where on a holly you can change jets, power valves, float heights, etc. quickly and easily making tuning far easier for the aplication.

[@wesalker3479]

You can reduce/eliminate throttle shaft wear by moving throttle return spring anchor point to the front of the intake manifold instead of under the throttle cable/linkage. When it is under the linkage, BOTH components are pulling in the same direction, thereby loading the back half of the throttle shaft bore.

[@Trains-With-Shane]

@@wesalker3479 I'll look into that if/when I either have this one rebuilt or replaced. It's not very high up on the priorities list at the moment, unfortunately.

[@dale116dot7]

I agree, it was also one of the last carburetors that was able to meet emissions before EFI took over. The triple booster primary gave a nice crisp response on the primaries without trying to get ‘just right’ pump shot. Great throttle feel. I design production EFI systems now, they’re far more accurate than any carb ever was (I get A/F ratio errors smaller than 0.01% across the whole operating range, including transients), but the Q-jet really was the closest you could get mechanically.

[@rustybritches6747]

WOW, 4 years already! I thought I was watching a repeat video of one of or maybe the first video I ever watched from Uncle Tony! man time flies, but apparently backyards and camera angles don't because it looks exactly the same! LOL ♥️ BTW I love the quadrajet when it's dialed in and working properly even though it weighs a thousand pounds compared to other carburetors but nothing beats the sound of a quadrajet, when those secondaries open thats an iconic classic sound!

[@mmiller1188]

I'm not a carburetor guy but I love the sound of a flipped lid quadrajet when the secondaries open up.

[@ericgautreaux1752]

The sound of a 396 when the Quadrajet kicks wide open is unforgettable.

[@thedanchannel5528]

My camaro had an electronic Q-Jet from the factory. What an absolute pile. I swapped it with an earlier model. Picked up a book with tips and tricks for Q-jets, and proceeded to create the best running street carb I’ve ever owned. Since moved to Holley’s for performance, but still love a well tuned Q-Jet

[@davidcarper5411]

Simplicity is an asset to Holley

[@stevelacker358]

The tiny, centrally located bowl is actually a pro when it comes to off-roading, and off-roaders still love it when they don’t have EFI. The Q-jet can operate at angles that would make most other carbs lean out on one side and drown on the other. I’m a bit ashamed that I’ve never a run a Q-jet on one of my own cars . I’ve got probably a dozen Thermoquads, though, and I really, really love those. We all know the weak spots of that one, but when it’s not abused with over-torqued bolts and incorrect jet well O-rings, it works wonders.

[@Whateva67]

True.

[@christopherc3017]

It was a dodge man many years ago who taught me how to rebuild and tune the quad. Once again a dodge man helping the Chevy people.

[@MattMntk]

Had one on my first car ever...man, what a sound it made after you flipped the air cleaner lid. Made a teenager grin ear to ear!

[@mikemccann9067]

As an old guy coming back to a classic car, this was a terrific breakdown of the Quad-J. It was clear, simple and to-the-point, I have subscribed to your channel and look forward to digging into all of your tutorials, thanks Brother!! (currently resto-modding a '68 Impala Custom Coupe, wish me luck :D))

[@guyderagisch4964]

The 1986 k20 suburban I grew up in had a quadrajet, it was replaced with holley pro-jection, and put back on because the holley ECUs wouldn't last. My dad claimed that when properly tuned there was a 1 or 2 mpg difference between the q-jet and fuel injection.

[@alsguitars5127]

I think they hung out to 1990 on some 307cu in. but Tony is right on with his observations. To some degree people love what they are familiar with. I like the Q-jet, I know it. No component is perfect but those are as reliable as anything made and have good throttle response. Everything is made with a purpose you just decide what fits yours. But now Uncle Tony, I want you to hot rod one and show us all how it turns out!

[@Bbbbad724]

The Thermoquad on a 340 is great! And tuning the T-quad is as easy as an AFB. I love the metering rods especially the 3 step.

[@robertlucas1435]

Being a young 20 year old car freak myself, it's so nice to see some love for this carburetor, the quadrajet and thermoquad will always be my 2 favorite carbs just because of that sound. The sheer tunability of the Q-Jet puts any fancy holley to shame, I've been wanting to get myself a small car to swap a 350 into with this carb

[@kenchorney2724]

Love the Q-Jet! Lost count of how many of them I have fixed/overhauled/tuned. Doug Roe's book was the bible for these carbs.

[@randywl8925]

It is and he unravels the mystery. I had a 73 stepside and after a few rebuilds over 300000 miles I never had vapor lock issues. I installed an Edelbrock Performer manifold so maybe aluminum behaves differently. The correct rods on the secondaries and setting the air door spring made a big difference. I was just under 300 HP, so definitely not "high performance", but it served me very well. The ultimate "set it and forget it" carb. They don't need constant tweaking to keep their tune.

[@Bbbbad724]

@@kennywhiddon1497 Yes the Olds 442 in 66 and 67 cleaned up in C/Stock. It wasn’t until the Ford FE 428CJ that anything else would beat it. 1 race Shelby Mustang fastback in 67 ran the KR8 that was a 428 CJ that gave Olds any grief. In 68 Olds ruined the 400 by putting the 4.25 stroke in and reduced the bore to get 400. The best in 65-67 were the Olds OA1 400, a 7000 rpm screamer, the Pontiac 400 Ram Air 3 and 4 , the 375 hp 396 Chevelle and the Buick Stg1. Until Ford got their 428CJ Mustang fastback, they Ruled. The KR8 428 wasn’t allowed to run but one race. I still have my 394 ci FE with a Holley now, but when I had the Qjet on it after the modifications and an electric pump with AN-08 line and a deadhead regulator at 7 lbs I would wind it to 7000 +, and even now with the 3310 750 a friend of mine put a jet block on in place of the plate, it will do 7000+ but no quick getting there than the 850 Buick Stg1 carb..

[@dalejohnson3520]

I love the Q-jet. I always used air/fuel gages, vacuum gages, timing lights to tune them. I also found that a fuel pressure regulator helped with a lot of the fuel issues relating to heat and small bowl size.

[@academaciated7466]

You turned me back on to carbs and that’s all that matters 👍🏻

[@jtg2737]

I find it funny how the dog made its rounds around 4 X's while this video was made. This was another simple video on extra information that I just learned. Thank you and a hello from San Antonio, TEXAS.

[@jasonarnold9847]

Uncle Tony thank you so much for taking your time to get online to explain carbs it's been very insightful

[@GenasysMech]

"CHOO-WAAH"...my rendition of the Q-Jet secondaries kicking in. The phenolic bowl float had a habit of gaining weight as well. Spread bores the way to go for street rodding. The 440 Chrysler NY'r Thermo was perfect for SBC 327 builds. Some versions had a cool solenoid activated idle circuit leaning feature that added to the idle loping of the cam which was always cool to kick in at a red light making it sound even badder...fun days for sure.

[@randywl8925]

It's spelled CHOO-WAAAAAAH

[@hitekbigmek]

Qjet years were '65-'90 .. 1965 Chevelle 396 got them ... Ram Air 4 Pontiac , Buick GSX 455 and quite a few others were very high performance cars

[@dallencloyd1776]

They're my carburetor of choice for 4x4 use. If you're climbing a steep hill, they'll just creep along. Edelbrock/carter do ok too, but Rochester if far superior in that application.

[@hilltopmachineworks2131]

I had a buddy that mounted his Q-Jet backwards in his Jeep CJ. Never had a hic up on a steep hill climb.

[@dallencloyd1776]

@@hilltopmachineworks2131 I haven't done this, but I've heard of this. Supposedly it works pretty well because gravity is forcing the fuel towards the primaries rather than away from them.

[@lonotiki]

Got a Q-jet in my 63 nova wagon. I'm learning to swap out her old gaskets and I'm glad you mentioned the plugs, I'll look in there too. Thank you confidence building videos, it's you that have helped me through many understandings of my car :) Thank you...it means a great deal!!!!

[@davestarkey7519]

Never used a quadrajet, but I love the T-quad.

[@magmomwise]

My personal experience with carburetors has been mostly with the Quadrajet. Once I leaned how all the systems worked I found it to be the most tunable carburetor and I was always happy with the results. Easy starting, Smooth running engine throughout the RPM range and really good fuel economy. Yes it has it's issues but they all do. Electronic fuel injection has really put most carburetors out to pasture.

[@johndevries8759]

Watched a super stock Camaro run 9's with a Q-jet, impressed me to no end.

[@paulgill5813]

Are you sure it wasnt a Holley carb that ran that fast

[@johndevries8759]

@@paulgill5813 I'm positive, it blew me away when I walked up and the hood was open, there sat a quadrajet. Of course the motor was worked on, had state of the art heads, cam, etc.

[@mschiffel1]

I saw a 1965 Chevy Impala 396/325HP with a factory installed Quadrajet carb. So GM introduced them in 1965. I had a 1985 Dodge pickup with a 360 and a factory installed Quadrajet. It ran great.

[@ripperace]

JB Weld has always worked for me to eliminate the well plugs leaking. Although, using JB Weld that will hold up to modern ethanol enhanced fuels is imperative. Also, some of the later Q-Jets were sought after by street guys due to the larger fuel bowls. You’d know these in particular, as the air horn has more screws attaching it to the fuel bowl over their older derivatives. (Think just prior to the CCC carbs.) Those had double vacuum breaks, and the bigger float bowl. They were the Chevy hot rodders dream carb. I believe they were only made for a couple years before they all went CCC.

[@livewire2759]

I've only ever had trouble with jet wells leaking on the very early Q-jets. I've seen lots of the later ones "fixed" with JB weld that didn't even need it and the epoxy turns brittle after several years and flakes off anyway. The only way to permanently fix leaking jet wells is to remove the lead plugs and tap the holes, then use set screws and put epoxy on them like pipe dope.

[@eddieb4227]

@@livewire2759 that's exactly what I do. But I use aluminum rods and thread them, cut to length and cut a groove on the end. Use extreme high temp thread locker on them.

[@thefinalroman]

Pos carb needs glue lol

[@smilsmff]

was reffered as Quadrajunk when i was in Highschool. most chevy when floored would just emit huge Black brown smoke cloud. and oh Thermo Flood

[@johnkufeldt3564]

Hey UT, John and Ashly in Canada. Just want to thank you for sharing your carb knowledge and passion. I love carbs . Fixed my accelerator pump in Mexico (67 Rambler, 232 2bbl) with a tassle from my girls leather coat and a razor blade and screwdriver. That was in 1987 when I was 21.

[@BareRoseGarage]

My father built his shop, business, and reputation on that Q-Jet right there. He did them all, but that was his bread and butter. But the vast majority of all of them where for people just wanting to go down the road. Drivers not Racers. As for the Secondary Metering Well Plugs... that was dad's secret weapon for success in all that. We bought the factory Re-Build Kit for them, with the O-Rings (QJT-1 & QJT-2 part numbers if I remember right). Drill them out and pop in those plugs and they run forever. We used to buy them by the case, and still have about a half a case of them left over...... I think it was a $2 part and only took a couple minutes to install. One of these days (now that dad has fully retired) I'll get video of him installing them 1 last time. Good Video as always UTG!

[@oliverrojas7117]

Thanks, very interesting review reporting the new design of smaller primaries and larger secondaries. It's so enlightening to see efforts were made to save the fully mechical fuel distribution system prior to fuel injection. Learning this helps draw a link between the past and current production variable valve timing.

[@t44e6]

Interesting theory about the fuel spec change. Less volatile fuel reduced passive emissions, part of it was emissions related.

[@shoominati23]

I think that is partly the reason why GM went to the 1 piece rear main seal after 1986 , oil leaks and fuel vapors were then included as part of the total vehicle emissions

[@repete2362]

when i started running a Qjet on my 1966 GTO i had to rig a fuel return line to the tank to solve the vapor lock . this was about 2004 before that i had ran a holley anda 2 bbl without vapor lock problem.

[@edmundanderson657]

@@repete2362 i don't know about the earlier ones but I'm sure 68 and up came with higher volume fuel pumps. It had a 3rd line on it for return. You could always tell if someone swapped out there 2bbl for a Qjet, the fuel pump only had 2 lines.

[@johnelliott7375]

Congratulations on your 4 years on the air helping out with their cars. I wish you a great Labor Day from my family to yours. I have been around from day one and I will be continuing to yak, like and share your videos until you go off the air. God bless you all and I will say the same for your friend The Bennett family. Good morning to you and I hope that you have the time to comment back. I had a few of them on late 70's Pontiac Trans Am's, Chevy Nova's, and a couple of Oldsmobiles I only had a problem with one that wouldn't idle and it sat at a car lot after being wrecked for a good time and a rebuild fixed it and it was the only problem with them I ever had. Great day to you all again, thanks for sharing your milestone with me and my family/friends.

[@pllinc7014]

You are absolutely correct Tony: Q-Jet fuel bowl is small. How do i compensate for that? Run Z-28 / Corvette / High Capacity fuel pump, remove internal fuel filter and run in-line filter. Change the tucked fuel line from pump to carb, (has too many bends) and run the line in a straighter fashion, away from the engine and insulate it. You are again correct when you say you can get away with it if your fuel delivery is top shape. Thank you, Keep up the good work. Pierre Lafontaine

[@alleyoop1234]

In 67 & 68 the intake manifolds had the exhaust heat crossover also going through under the base of the Qjet and used a thin gasket with the stainless steel thin heat shield. The old 2GC actually had the exhaust running through the base of the carb! In about '69 they deleted that system. Chevy did make a Qjet aluminum heat shield too

[@WVXL64]

If you look at 1967 Q-jets and their intake manifold, you will see they have a channel in the base plate that runs under the fuel bowl that is fed exhaust gasses from the intake. This heated and vaporized the fuel in the bowl. They did away with this passage in 1968 which solved a lot of the issues. If you don't drive in the cold, block off the heat crossover in the intake manifold and you won't have heat issues with the Q-jet.

[@Motor-City-Mike]

Actually a damn good carb - once you figure them out. I ran 'em on all my Chevys, a few Fords, even an IH pickup I had. Guys forget, at WOT any two carbs with the same airflow and fuel mixture make the same power. I like that the Q-jets fuel curve can be tuned so close, and the only issue with making big power is the tiny fuel bowl - which there's more than one way around. Holleys are fine - they're simple and easy, if that's all you want.

[@pippendog1]

I agree ! I replaced a Holley with a stock 1973 Q-Jet from a Chev. Blazer on my stock 1976 Jeep 304 . Much improved acceleration and great sand dune climbing ability !

[@P_RO_]

Bullseye hit about WOT/airflow. What the Q-jet did was improve everything between idle and that so you'd go faster getting to the top.

[@livewire2759]

I'm in the pro Q-jet camp, I run late '70s chevy trucks, all with Q-jets. I like them for economy and low end throttle response, I almost never even open the secondaries on them. They were introduced in '65, then became widely used in '67. The bowl design, float and needle valve were refined in the late '60s to increase bowl capacity and to give the float more leverage since they had problems with the fuel pump overpowering the float and forcing the needle valve open. It was also around this time they started using extra thick base gaskets to try to reduce the heat getting to the fuel bowl for the problems you mentioned. You're absolutely right about a conspiracy to make gasoline less volatile around that time so it wouldn't evaporate so quickly, but it wasn't a conspiracy between GM and the refineries, it was done because of govt. pollution laws to reduce emissions... less fuel vapor polluting the air. It was also around this time they stopped making external bowl vents on carburetors, and shortly after they introduced charcoal canisters for fuel vapor storage (evaporative emissions systems) and stopped making vented fuel filler caps. Anyway, if you're having trouble with vapor lock on your Dodge truck, you're best bet is to just swap it to a thermoquad so you don't have to modify throttle linkage, etc... You probably already know that you can get a base gasket that helps insulate the fuel bowl (two designs, one is open under the fuel bowl, the other closes off the gap under the bowl) but they don't always work and may not work at all on a Dodge for all I know. I like to block off the exhaust crossover in the intake, that seems to help the most, but then you also have to convert to manual choke, which I prefer anyway. The older 4MV Q-jets (up to 1974 in cars and 1978 in trucks) are less prone to vapor locking than the "modified" M4MV Q-jets (1975 and up in cars and 1979 and up in trucks), but the later ones have much larger fuel bowls and more adjustments so the're better for performance.

[@troyallen3427]

In Michigan we loved those carbs on our work trucks especially in the winter they always just worked.

[@hunnybunnysheavymetalmusic6542]

Actually, it was a super thick fiber gasket. They began installing essentially a heat barrier to keep the carburetor cooler.

[@christianperspective9527]

They also added a return line on the fuel pump

[@hunnybunnysheavymetalmusic6542]

@@christianperspective9527 I remember early on that a lot of vehicles did not have internal pressure regulation in their fuel pumps, and when I would install a newer pump on a car, I had to rig up a return system to the fuel tanks.

[@Bbbbad724]

I had mine on an FE Ford, and I made an aluminum heat shield that want out and up to keep the heat away and always block the heat passages in the exhaust ports with a thick piece of stainless steel in each sides port shaped in the bowl and Devcon to seal the bowl and a thin piece of stainless in the gasket passages installing it. On an FE half of the head is the intake. I liked the Holley SD and used a homemade plywood adapter where I started a spreadbore shape and sealed the adapter with a gasket and it was matched to each with the heat shied and I wore that carb out, daily driver street racing, it was perfect!

[@bizeerog2281]

Thanks Tony for throwing me back in time. I will never forget the 70 Chevelle SS I had with the LS6 and cowl induction. I think the rochester was the 800cfm version. When the 4 barrels opened up the sound coming through the cowl induction was unreal. Thought it was going to suck the windshield out of the car. I had a buddy that did some modification to his on a 69 vette BB that supposedly got it to flow 1000cfm.

[@bizeerog2281]

@@racer44x Actually you are correct the engine had a holley on it originally. The manifold was a square bore also. I did not have an adapter but did have a spacer. So dremeled out the secondary side of the spacer on the quadrajet side to fit. So many years ago. The town was 3300ft above sea level and at the time just could not get the holley to run right. Also would eat so much fuel barely had enough gas to get to the next town.

[@glennmanchester5335]

I don't believe it could ever flow that much or even need to but good story

[@davidchristensen2970]

I literally laughed out loud when you simulated the bog! This was a really good introduction to the Quadrajet. I was having trouble with being able to satisfactorily rebuild these things until I bought a set of special tools (including a throttle shaft bushing install kit) to get all the initial settings right (CCC era).

[@crazycoffee]

I learned the QJET on my Toronado. After replacing rocker arms, pushrods, and intake. First fire it had a huge backfire out the QJet and split it at the secondaries opening. I loved cruising in it. I liked the kick of the secondaries opening. 800cfm QJet on the 455 Olds was pretty fun. It was the first not lawnmower or tractor carburetor I rebuilt. Will still hold a place in my heart even though I'm 21 and only had the QJet for a year and a half.

[@powderriver2424]

My father could make a quadrajet carb produce he loved them too. He wasn't a professional mechanic but so many guys dropped carbs by the house for my dad to work on. Besides as you said they were the best moderate to higher performance carbs out there and they were cheap. After he passed in 06 I had boxes full of carbs and parts and I'll tell you I had guys begging for what I had.

[@larryr8492]

Had those on my first 76 Impala 400 small block. Got 20mpg if I stayed out the throttle and made the coolest sound wide open with the air cleaner top flipped over.

[@tricycleguy2657]

Fellow lid flipper. had my all stock 72 k20 lid upside down always howled up the hill to the scrap yard with a load of junk.. miss them days of being a poor kid with a cool truck

[@gearbender427]

I remember when the thermoquad rebuild kits came with the new plastic body, and when the quadrajet rebuild kits came with the foam plug, they worked well for me.

[@randombeel9472]

I used to love getting free quaddies when my mates put holleys their cars, and the induction roar when those back barrels open sounds spectacular

[@slimjim2291]

I have found that a trans cooler between the pump and carb solves the heat soak issue. It can be 95+degrees and the carb is cold to the touch. Also insulating the fuel line from the cooler to the carb is a good idea.

[@slimjim2291]

@@geosradiomusicalstuff3124 yep.

[@slimjim2291]

@@geosradiomusicalstuff3124 I will add that I have only ever used a stock mechanical pump while doing this. I would guess that a trans cooler can handle more pressure but I'm not sure how much.

[@jameskisor8632]

They started using a thicker gasket under the carb and it solved the heat soak problems

[@briang4470]

The super early ones, 1965- around 67-68 used a heat passage directly under the carb base and required use of a thin, metal sided gasket and those would really heat up, sometime in the late 60s they quit using that whole system and started using the thick 1/4in gasket with no heat passage which greatly reduced carb temp.

[@pgtmr2713]

I knew there'd be some way to easily engineer out the problem. I love stuff like this.

[@960wattoffgridrv]

What I did to fix the vapor lock issue was I had to get more cool airflow into the engine compartment. 1981 GMC Vandura 3500 21ft class C motorhome. I struggled for nearly 2 years with what I thought was running out of gas. But one night at a huge car meet. I attempted a burnout (yeah in a motorhome) and suddenly my engine died. Everybody at the car meet (mostly younger people) had no clue what I did. I opened the hood, removed the fuel line and started cranking the engine. I had these kids watching in shock that I was making the engine run again. I also watched air bubbles going through the inline fuel filter. I realized that I was getting too much heat inside the engine compartment. Later on I was back at the shop where I was working. I borrowed the grinder with a cutoff wheel and I cut out a piece of metal nearly the size of a license plate out of the upper rad support to get more airflow. Immediately after that, I no longer had all that heat buildup and no more vapor lock issues.

[@koopeysgarage2905]

There's only 2 videos worth watching how to rebuild a Quadra Jet carb and this is one of the best! Thank you for doing it. I really learned a lot quickly from your income full video.

[@ourkid2000]

I have a 1966 Olds which came with a Quadrajet so 1967 was definitely not the first year for the QJ. In fact, the 67 Olds came with a completely redesigned QJ compared to mine (vacuum damped secondary's rather than fuel dampened) so by 67 they were already onto a second iteration of it. Great video though, love the review.

[@livewire2759]

In '66 they were only used on the 396 big blocks, but in '67 they started using them in almost everything, except trucks which didn't get them until '69 or '70.

[@ourkid2000]

Again I have a 66' Olds with a QJ. It came on it from the factory ll

[@eddieb4227]

@@livewire2759 oldsmobile used it on almost every engine they produced in 66. Look up the 66 olds toronado!

[@lgude]

The moment I saw those wee primaries and honkin great secondaries I knew I never rebuilt one or owned one. But I rebuilt many earlier 4bbl GM carburettors and noticed that people would quite commonly lock the secondaries out to improve gas mileage. So based on that experience I think GM did a great thing to do an asymmetrical design.

[@dangeary2134]

My favorite carb!! I had rebuilt one for my car way back when, and the cold-started engine ran at exactly the same idle speed as the warm idle!

[@Chisos1]

Never ran into any vapor lock problems on my 1966 Buick Rivera with the 425 c.i. Nailhead and it gets hot in west Texas. I suspect the design of the manifold having air flow across the bottom of it kept carb temps down. You could hear that motor halfway across town when the secondary's opened up. Loved it.

[@mongomay1]

What about using the bypass fuel filter application to prevent vapor locking?

[@mikesr3407]

My little brother and I thought our Buick 455 w/ quadrojet was fast until a 440 Thermoquad wasted us like we're setting the parking brake !

[@n.mcneil4066]

That big rear choke butterfly was actually an air vane that was hooked up to two tapered metering rods. It operated much like the variable venturi carbs used on bikes as well as 351 & 400 Ford engines in the 80's.

[@ChrisSs85]

Man, glad I watched this. Had just watched your video about the fuel filter with a vent and that helped tremendously. Now I just get a cough when its hot, had no idea it was also vapor locking in the bowl as well. Crazy.

[@alanwilliamson9350]

I'm a fan of the quadrajet. Never had any issues with the ones I've used.

[@Thumper68]

They are good carbs id say the best feature is they will idle and start on extreme angles easily while others can seem struggle. And the sound of the secondaries opened up which I always had a problem with not hearing at all times 🤣

[@kramnull8962]

Have you gotten around to strokin a SBC for your Camaro? Watched your short, awesome car. Extra clean with that vinyl top. Dad had a 70 Impala White with a Black vinyl top and they just added so much to the image of the body styles...

[@Thumper68]

@@kramnull8962 Thank you. But yeah I want to get the original engine out and put on a stand and save for cars matching numbers value. I have everything ready to build one except cam pretty much. 350 .060 over, wiseco skip white performance pistons, 6” rods, 45 lb custom crank. I have some camel hump heads I was going to use that are all ready to go but I think I’m going to go aluminum so I’m trying to sell mine first. I do all this on $1200 month disability so it takes time unfortunately.

[@diontiasevski1403]

Congratulations on the anniversary mate, well done.. Watched & liked every single video over years, learnt more than I ever have & confident with my engine works thanks to ya! How about you get some more tshirt stock Uncle T? Cheers buddy!

[@UncleTonysGarage]

Much appreciated, thank you!

[@sagepope731]

My truck had a lean issue on the secondaires, pulled the carb apart and found four check balls in it. Re built it back to factory specs (minus the electronics) and it's never failed me.

[@adaml1162]

GM ran em for decades for a reason. Most reliable carb ever made.