Holley 670cfm TBI on Chevy 350 - 8 year review

[@HectorHernandez-bx8ei]

☝🏼️☝🏼☝🏼👍🏻👍🏻👍🏻💪🏼💪🏼💪🏼

[@LuisAFigueroa]

I just got one of those for my 92 Camaro for just $40 in very good condition. Nice to see they're reliable.

[@W1Ck3Dj3St3R1]

I just took the injector tower off the old throttle body, and put it on the bigger ported Holly. had to grind a little for the fuel line to fit but worked fine...Didn't have to splice or cut into any wires.

[@adaml6458]

What was the benefit to keeping the stock injectors? Are they better, more reliable, or something else?

[@colonialroofingofnorthcaro441]

I was looking for each one of your vent lines and where they hooked up, but hard to see with all those wires and hiding running around, but thanks for the vid

[@darinr9424]

wouldnt mind tryin a dual quad intake and run a pair of the tbi units with a holley computer.or a tri 2 barrel setup with 3 factory tbi. yea there are nice kits out there for 4 barrel setups. but i think it would look pretty darn cool.

[@nimbusnimbus.IV.]

I've been thinking that for years. Duel 4bbl intake w/adapters running 454 TBI. Some guys been running Megasquirt for computer

[@lorenzoleyba5295]

Corvette cross fire injection had 2 tbi

[@darinr9424]

@@lorenzoleyba5295 2 small ass junk units. I mean dual holley 950 cfm units with dual 90 pph injectors on each Not that small junk crossfire dual setup. Big difference

[@thedobermangang3503]

i never try the chip off line but depends on your up grades chip from intermet wont work..you have to get a good tuner thats real good..

[@thedobermangang3503]

THE REASON I WERE LOSING POWER AT ABOUT 45 MPH AT 2000 RPM IS THAT I STILL HAD THAT STOCK FUEL PUMP IN THERE AND I SHOULLD HAVE CHANGE IT..I GOT A UP GRade now ac DELCO EP381 1996 vortec PUMP..IT IS 155iph wish supports up to 450hp

[@KooshdaakaaGarage]

That's the one I want to get too! You'll probably get there before me. You'll have to tell me how you like it. My plan is to do some frame restoration this summer and will swap out the fuel pump while the bed is off, maybe change the hard brake lines too.

[@thedobermangang3503]

@@KooshdaakaaGarage hey i dont have the specs of the cam with me that he put in there right now i have it around here somewhere when i find the paper i will let you no..i can tell you this he fuck up...i do no he put the wrone one in there..but this time you can beleive its going to be right..

[@dancingwithbear770]

Have the same tbi works great at idle but bogs down when I try to step on it like it has to much fuel any ideas

[@KooshdaakaaGarage]

Hello! I had a similar issue with mine but it turned out to be the fuel pressure regulator diaphragm ripped. I replaced it with a stock one to cut the fuel consumption down and it did the trick. You may consider getting a stock FPR diaphragm too. That of course is the quick cheap fix. The alternative is to introduce more air via upgraded heads, cams, air intake, intake manifold, etc. Which is always a fun option :)

[@randy1ization]

the injectors on a 454 are 4.3 liter injectors, gm ramped the fuel pressure to 30 psi on them

[@cuenta2202]

Good tip

[@darinr9424]

4.3? u mean 5.7 injectors with more pressure? 4.3 inj are 50 or 55 pph. 305 and 350 injectors went up by 5 pph respectivly per engine size

[@randy1ization]

@@darinr9424 it had 4.3 inkectors and ran too lean , the 5.7 injectors ran perfect,, the pressures in the injectors didnt go up until 96 on

[@darinr9424]

@@randy1ization 96 and on were a different type of injector completly. it was a port inj with poppet valves. all the injectprs were in a cluster in the middle. not a TBI inj.

[@thedobermangang3503]

if i new i had to go threw all this to get my truck to run right i would have spend a few more dollars and got the holley sniper EFI AND I WOULD HAVE BEEN HAPPY

[@KooshdaakaaGarage]

You would be very happy with an efi setup!!! Man those things are just what the chevy dr ordered for these old TBI. I wish those existed when i bought mine 🤘🤘

[@johnnymack8442]

Of you change your fueling system. I would be interested in buying that Holley tbi from you.

[@KooshdaakaaGarage]

It's a pretty sweet unit. I'll keep you in the loop man.

[@iDrive4fun93]

You could get a Holley Sniper for a few bucks more than that 670. Get a dual plane, vortec-to-tbi manifold, some vortec heads, a mild roller cam, and headers, and you’re not too far from 400hp, and you have a programmer. An Edelbrock Pro Flo 4 port injection manifold/EFI combo or a Holley Terminator aren’t bad choices either for a bit more money.

[@KooshdaakaaGarage]

For sure. If they had EFI as affordable and effective 9 years ago when I bought the 670, I'd be all over it. I've been looking into the summit racing heads, comp roller cam, and performing some port matching from the TBI to intake manifold - intake manifold to heads. EFI will have to come later on down the road after I finish my Duramax project. For now the ole SBC 350 makes for a damn good hauling rig.

[@iDrive4fun93]

Kooshdaakaa how much power are you getting out of the 670? I was on another thread and it seems the 670 can support a fair bit of power, with a Summit 1103 cam, vortec heads, a chip from TBIChips, Chevy performance intake manifold, and a full exhaust.

[@KooshdaakaaGarage]

Can't say for sure how much power. I have the jet 6 stage chip, holley tbi, edlebrock intake, shorty headers and 3" exhaust. It was enough to blow the tires off a newer stock ls 6.0 in a straight away. Boy was he pissed! Those summit cams look pretty rad, I haven't seen too many people run them yet. I use my truck primarily for hauling campers, wood, dump runs as well as romping through the mountains on old logging roads so a nice bottom end torq monster cam is what I'm looking for.

[@KooshdaakaaGarage]

Gotta say, a mild summit cam and vortec heads would be pretty freakin awesome 🤘

[@iDrive4fun93]

Kooshdaakaa awesome, basically what I am looking to do to my truck. A buddy of mine has Vortec heads but he left one of them outside and it needs all new valves, springs, rockers, etc. I would need to get them resurfaced and planed, and then buy an all new valvetrain, so I think I might just buy brand new heads. The cost isn’t far apart and it’s a lot less work. You have the chip already, so an 1102 or 1103 cam would work wonders in your truck. The 1102 has a little more low and mid range grunt, while the 1103 has a bit more up top, but power is increased all through the powerband with either cam.

[@graysenh-ti8tu]

How the hell do I tune it I bought a truck with one and it idle so high when I start it and I would thing maybe idle high for a second and then go down but it always has a super high idle warm or cold

[@KooshdaakaaGarage]

@graysenh-ti8tu you'll want to get a tuning chip from somewhere like jet or hypertech. I have the jet 6 stage and love it. Economy mode and tow haul are my two most used. Also check your vacuum lines for leaks. One thing I also did was swap out the fuel pressure regulator diaphragm for a stock version which flows a little less than the diaphragm that came with the holley . My 350 is mildly built so it didn't need all the fuel.

[@jayarmenian629]

Where did you connect the ported vaccum ? Do you have video of how you connected your lines ?

[@teamdanados1525]

friend, can you help me please, I have a Chevrolet suburban 1500 5.7 vortec 1996, I made the TBI carburetor and distributor, I had the camshaft altered a bit in stage 2 and I put an aluminum radiator with electric fans (the problem is that it It heats up after 15 or 20 minutes and the time according to the mark on the pulley is not left, I move the distributor and not Measure the time) What is the problem? can you help me

[@thedobermangang3503]

my engine is being done right now the cam im putting in is a xe 262h when i get threw with it ..it will have alot of power with my up grades ..that up grade fuel pump and up grade regulator spring edelbrock intake 4.10 gears i took the stock torque coverter out and put 2000 to 2400 stall in there and i got a good tuner thats going to do my chip and he is the best i learn alot from him that i didnt no..i send alot of customer to him ..

[@KooshdaakaaGarage]

Nice! I read about that cam, looks perfect for a 350. The 4.10 gears is a damn good upgrade for the big tires, it'll put the power to the ground for sure. Hell yeah man, got yourself am offroad beast!

[@Staygolden6996]

Hey bro long fucking time ago but do you happen to know anybody that still burns chips?

[@ethanvess3823]

Do you know where u got the diaphragm kit I'm in need of the same one

[@KooshdaakaaGarage]

@@ethanvess3823 summit racing! I'm sure you could find one on amazon too. Get the oem diaphragm that is 4-6 psi

[@thedobermangang3503]

I LEFT EVERYTHING UP TO MY TUNER HE KNOWS EXACTLY WHAT I NEED..IM NOT RUNNING MY TRUCK THREW NO MUD PAID TO MUSH MONEY FOR THAT PAINT JOB,, MY TUNER SAID THE 249 IS TO SMALL FOR WHAT I GOT AND THE 262 IS MUSH STRONGER CAM AND I HAVE 35X12 TIRES ON MY BLAZER 4.10 GEAR AND UP DATED MY COVERTER TO A 2400 STALL AND UP GRADED MY FUEL PUMP I ALREADY HAVE HEADERS ON IT 3' PIPES ALL THE WAY BACK I GOT A FEW MODS DONE TO MY TBI MY TUNER TOLD ME TO GET THE TRANS -DART 2534 TBI SPACER AND WHEN HE BURN THAT CHIP I SHOULD GET ABOUT 380 TO 400 HP

[@KooshdaakaaGarage]

I'll be looking forward to watching your reveal video when its all done and you are mobbing around!!!!

[@thedobermangang3503]

@@KooshdaakaaGarage IM HOPING EVERTHING TURN OUT GOOD...

[@thedobermangang3503]

hey this is the second chip he made for me the frist chip it was alittle better but the power and the acceleration just wasnt there at 45 mph or about 2000 rpm it would break down like i was not getting enough fuel and that was the problem so he got to do another chip and i have to change the regulator spring in the tbi ...hopefully i should be good..you no its hard to get it just right when someone in another state doing the chip for you..

[@KooshdaakaaGarage]

what a pain! Yeah, I bet that guy would be able to create a nice chip for your if he got a hold of your rig in person. Ahhh the trials and tribulations of building badass rigs. Those FPR diaphrams luckily are easy to come by and are cheap and easy to replace!

[@zanixinaz]

Did you have to do any modification like wiring to get it connected or is it just plug and play ?

[@KooshdaakaaGarage]

Thank you for the question! No wiring or anything with this Holley unit, it is a direct plug and play replacement.

[@IsaiasMoreno.]

Im having running rich issue on mine it smells alot like gas . Idle ok but smells and burns lots of fuel and getting smoke

[@KooshdaakaaGarage]

Ah your regulator diaphram might be tore. That is exactly how mine was acting. It's an easy amd cheap fix!

[@thedobermangang3503]

the reason i ask you is because i have a 1990 k5 blazer 5.7 my situation may be alittle different when it come to the chip i rebuild my engine i got about 640 miles on my engine so far..i put a few up grades in it .. nothing big... i got 3704 edelbrock intake upgraded the cam xtreme energy camshaft 434/444 lift 206/212 duration with seperation 112 degrees i took the stock torque converter out and upgraded with a 2000 to 2400 stall it has 700r trans in it 35x12 15inch tires 410 gears in it ..my engine will not idle good and dont have the power i should have cant seem to time it correctly but it sounds good its not missing or anything like that its like im losing vacuum im going to get my chip programed to that cam..i belive thats my problem ...

[@KooshdaakaaGarage]

You're on the right track man. The oem ecu isn't equipped to handle extra air and fuel mods. I think you'll be much happier with a tuned chip!

[@stevedriver1476]

Holley sent me an email regarding setting up another motor i have. my truck is a 1992 GMC C1500 2x4 5.7 auto. The engine i plan to use is a rebuilt 408ci sbc with entry level brodix heads and a hydraulic flat tappet cam crom comp cams. The Holley Sniper on my truck will require a stand alone transmission computer, bypass the original engine computer and my instrument panel wont work anymore. I think this Holley 670 can be the option and should feed a 400sbc thats around 400hp, the thing will bolt on, no new dash panel, no running sniper wire harnesses, no aftermarkey gearbox moduals. I am in Australia and none of these trucks around here. Your on your own.

[@KooshdaakaaGarage]

Hey Steve, I think the Holy 670 should hold up to the test for you. It's a simple, straight forward operation. If you can, I would port match the TBI to the intake manifold so that there is a 1:1 flow ratio. I'm about to port match the TBI to the intake manifold, intake manifold to the cylinder heads, perform a mild port & polish on the heads then match the heads on the exhaust side to the exhaust manifolds. I did a similar procedure on my Duramax and it made a world of difference for idle, smooth acceleration, better fuel mileage and the overall health of the engine feels better.

[@stevedriver1476]

People in America also gave me part numbers of 454 Tbi unit 1996 5.7 vortec fuel pump. All will bolt right on and work. I will be using a duel plane edelbrock air gap that will require an adapter to the Tbi. The as cast brodix heads are cheaper than playing with cast iron heads or buying chinese heads then replacing bits. By using alloy heads anx our fuel i can run 11.0:1 compression no problem.

[@KooshdaakaaGarage]

@@stevedriver1476 heck yeah man. The 454 tbi should work out alright for ya. The only complaint I've heard when running them on a 350 is that they over fuel at idle and cause the truck to run a bit rough at idle as you can imagine. Maybe a custom tuned chip may help with that? I'm not too sure. Those heads sound pretty sweet!

[@stevedriver1476]

@@KooshdaakaaGarage i will be using my spare 400ci chev. I do have a spare 383 thats in my camaro but its git a solid cam and makes power after 4000rpm. Its 470hp and 465tq. the old 400 will be more torque and power at 2500rpm. Better for daily driver

[@stevedriver1476]

@@KooshdaakaaGarage the brodix heads are made in america and 13 week back order wait is the only issue. I was running L31 vortecs on that 400 i am using. They had steam holes drilled and that 400 was in my camaro 15 years. Ran 13.0 ets at the strip. Stock bottom end. Our fuel is premium 98 thats equal to your 95oct. I can run 11.1 compression with alloy heads. So its cheap horsepower. If i use my vortecs i can only run 10.1 comp

[@Ricky-manic]

Just to think would it be possible to have a 4 barrel tbi instead of a 2 barrel?

[@KooshdaakaaGarage]

That would be rad 👌 you can toss a 4 barrel efi unit on though and that is super badass!

[@Ricky-manic]

I found on youtube someone has 2 2barrel tbi on a cross ram intake

[@willubhave5]

Put a tbi spacer with 2 inch bores, increase the timing to 8 degrees, and put a K&N filter than a paper element, 160 degree thermostat, 3/8 1.6 roller rockers...Im running a stage 2 jet chip it gets up there...probably with the all the bolt ons really close to the 5.7L vortec territory...

[@KooshdaakaaGarage]

Herd that Will! Thanks for the suggestions, I'll definitely try advancing timing and have been meaning to get at least the 180 thermostat (long overdue). Been considering the 2 inch spacer for a while now so I think you just gave me the push to pull the trigger on that! I did like the k&n filter when I ran it. I have the 6 stage Jet chip in there right now (economy, tow haul, stage 1 & 2 etc.) And love it, made a huge difference in conjunction with the holley.. Roller cam and a full gasket match and polish is going to happen in the near future now that the lb7 duramax is rebuilt. All in all this ole silverado still has a ton of potential it smoked a newer stock LS as it is! 🍻 the 5 speed manual and 3.73 gears help too of course.

[@alexditcharo4168]

when it was running rich did you replace the entire fuel regulator or just the diaphragm? did the holly tb come with a new fuel regulator or did you put the stock one in it?

[@KooshdaakaaGarage]

Hey Alex 👋 all I replaced was the fuel regulator diaphragm. It had a pretty big rip in it. When I replaced it I went with a stock diaphragm and it still runs fantastic to this day.

[@nimbusnimbus.IV.]

I had a 93 c1500 w/350 & 4l60e. Did Holley build factory TBI for Chevy? The one I had said Holley on it. I was told it was all stock. This guy is telling me Rochester was the only ones to build them for Chevy and mine must have been aftermarket. Is he right?

[@KooshdaakaaGarage]

To my knowledge holley did not build the stock tbi for these trucks. I know mine and all the others I've seen that are/were stock did not say holley on the tbi. I can say that the holley 670 I installed flows way better than the stock though!

[@nimbusnimbus.IV.]

@@KooshdaakaaGarage thank you

[@nimbusnimbus.IV.]

@@KooshdaakaaGarage I sold the truck years ago otherwise I'd be able to look at it. It also had this body kit on it & wooden interior, obviously from the 90's. There was a company that put these trucks together somewhere in the south. "Trans-Co" maybe? I'm not sure. I ripped all that stuff out. I replaced the TBI w/ one from a 454, replaced the regulator to an adjustable and injectors from the 5.7l and never had any major issues. The kid I sold it to is a junky and everytime I ask who he sold it to its always a different person. I now have a 19996 s10 and a 5.7l swap is in the works. That or an LS.

[@KooshdaakaaGarage]

@@nimbusnimbus.IV. I've seen an s10 with a 350. That thing was absolute hell on wheels! The dude who had it still had the s10 driveline and went through about 3 or 4 of them. Can't go wrong with a 350 🤘😁

[@1980sSinaloense]

Been thinking of getting this for my 3rd gen Camaro, 92 Silverado and a 94 Cheyenne but they are rather pricey so have been looking for one on Facebook market and offer up

[@KooshdaakaaGarage]

They are a bit pricey but they pack a punch that's for sure. In the future I may look into a nice EFI setup to spice up the ole girl.

[@1980sSinaloense]

@@KooshdaakaaGarage would you say the benefits justify the price tag ? Or would you say just go with a 625 street demon carb

[@S_Pascual]

Does your throttle fully open? Mines only opens 1/4 of the way

[@KooshdaakaaGarage]

Mine opens all the way. Are your throttle plates hanging up?

[@S_Pascual]

@@KooshdaakaaGarage yes won’t tried to add a spacer and same thing is your manifold bore size same as a stock one?

[@KooshdaakaaGarage]

@S_Pascual my manifold is slightly bigger, it's an edlebrock aftermarket. The plate shouldn't get hung up on the manifold though. The throttle plates might be a little off center. You can try loosening the screws on the throttle plate to adjust the plate then tighten it back up. It they are still snagging after that you might have to sand down the walls a bit where the plate is snagging.

[@S_Pascual]

@@KooshdaakaaGarageok will double check and see if that’s the issue. Thanks

[@thedobermangang3503]

sound good ....why did you take the stock one off do you have alittle more power or better acceleration with that one,,i were thinking about taking my stock one off and get the 670 502-9 ..i wont get it if its not going to be a big difference.

[@meyawabdulaziz3863]

that part is made to work with better top end (better camshaft and head if possible) , put a better camshaft in that thing and it will scream , a honda with 2.2 making 100hp while these TBIs with 5.0 and 5.7 liter are making between 190 to 220hp ? why because of a better induction system

[@KooshdaakaaGarage]

the holley made a pretty big difference with that additional air and fuel. it was almost like driving a completely different truck! lots more acceleration and it powers through hills with a load much easier. added bonus, it sounds a little more throaty 🤘

[@darinr9424]

no it wont scream with a bwtter intake cam and headers and exaust. the heads are way to tiny to make any power above 5k ish. absolute garbage heads. one of or the worst flowing heads chevy ever produced.. no joke. besides the computer wontbhandle those mods. not even close. not without a custom made chip for your specific setup. those ecu setups are very intolerant to any meaningfull airflow changes.

[@KooshdaakaaGarage]

@@darinr9424 are you talking about the swirl port heads? I didn't get a chance to use those, the original engine was dead when I bought the truck so I threw in a Mr. Goodwrench. Also not great heads but flow a bit better on the top end than the original swirl ports. One thing I'll say about the swirl ports from looking at dyno graphs, they are hard to beat in the torque department under 3k rpms. They are pure towing or rock crawling heads. I cant imagine they would be fun for the city folk or people who live in flat areas who spend more time driving long distances on flatter surfaces. I had my friend who I bought the truck from drive the truck after I got it put back together with a few fun parts and can he said it didn't even feel like the same truck anymore. The combination of the New Mr. Goodwrench engine, high flow air intake, holley tbi, edlebrock intake, jet chip, high flow shorty headers and high flow 3" exhaust was enough to get that thing moving scores better than the 100% stock original engine. Although I didn't drive it when it was 100% stock, I did blow the tires off of a new 6.0 ls 3/4 ton truck with my ole chevy 350 as it is. Heads and Cams are next after I finish up with my duramax project.

[@darinr9424]

@@KooshdaakaaGarage yea those were the ones i talked about. cometw crap unless its a tow/small motorhome or tryin for mpg.

[@IsaiasMoreno.]

Is the reulator adjustable

[@Itchy_fungus]

Would this fit on a 89 Chevy Silverado 1500 5.7 i clicked you link and amozon said it wont fi t on my truck

[@KooshdaakaaGarage]

As long as you have a tbi setup, this will work for you no problem.

[@Itchy_fungus]

Would i need the lower intake you think

[@KooshdaakaaGarage]

@@Itchy_fungus The intake manifold? No, so long as you have the TBI intake manifold (stock or otherwise) this holley tbi will bolt right on. It's built exactly like the OEM tbi with better flow characteristics. I highly recommend a tuned chip for your ecm to make use of the extra air and fuel. Plus the chip will utilize future air flow mods \m/

[@arctic3038]

How’s much of a difference honestly was this unit compared to the stock tbi?

[@KooshdaakaaGarage]

I upgrade this unit along with the Jet Chip at the same time so as to account for the additional air/fuel mixture and the difference was night and day! I remember the first time I drove it with the new TBI: usually to get up to speed on a merge ramp I have to feed it all the onions to get up to speed and by the end of the merge ramp I'm up to 55. Now it does it in about 2/3rds the time roughly and will noticeably put you back in your seat which in all honestly made me swerve the first time I did it because I wasn't expecting that much of a difference (boy was I wrong). Keeping in mind this is paired with the Jet Chip, Edlebrock Manifold, Shorty Headers and 3" exhaust in a Mr Goodwrench block, the Holley TBI tied it all together so the other parts can take advantage of the extra air and fuel. I"m going to redo the exhaust in the near future and I think I have the heads and cam picked out that I want - should be a fun off road vehicle. THE ONE COMPLAINT my friends and I have when we are daily driving is the accelerator pedal has NO CHILL. As soon as you hit the gas pedal the truck WANTS IT NOW and if you are not paying attention you will break tire. This however, when loaded with my camper translates to nice acceleration under load :) PROS: Tons of power throughout the power range, tons more bottom end torque, way more fun to drive over stock. CONS: uses a little more fuel, driving manners for start and stop daily driving is a little obnoxious because it just freakin wants to get up and go, however, its manageable enough.

[@arctic3038]

Kooshdaakaa what I’m asking is my ecu chip and long tube headers are on their way but my tbi is already here would it be a bad idea to install the Holley tbi and run with a stock exhaust manifold and chip before they arrive. Or should I wait and put it all I together at once

[@octoman_games]

Just got my hands on a 95' k1500, did this 670cfm make a difference compared to stock?

[@KooshdaakaaGarage]

Congrats on the ride 🤘 I've had mine for over 10 years now and can't bring myself to get rid of it. They are damn fine rides. The holley tbi combine with a chip did make a noticeable difference over stock. I'll say though that I already had an edlebrock intake manifold and shorty headers so the chip was able to take advantage of the bump in air flow from all the parts combine. If you go the Holley TBI route I highly recommend a chip, the stock ecu have a difficult time compensating for the extra fuel and air. It was about 9 years ago when I bought the TBI and if I were purchasing today I would get the holley "used" if I could get it for a good price. Brand new they cost about as much as an EFI Fitech, or for a few hundred extra you can get some of the other EFI units. All of which are self tuning. That being said, if you want to keep it TBI, the Holley with a chip is a solid choice.

[@octoman_games]

@@KooshdaakaaGarage Its the chip isnt it? seems no matter how many mods you do, if the ECM isnt flashed for it, it wont make a difference. I love my ride and will NEVER get rid of it! I want to do the vortec head swap too!

[@KooshdaakaaGarage]

@@octoman_games You got it man, just like the old carbs, they have to be tuned to accommodate the additional fuel and air. Vortec will be killer on the k1500! That matched with a mild roller cam would make it feel like a new ride :D

[@mikeydejon2148]

What chip do you use?

[@mr.2trucks485]

@@KooshdaakaaGarage what chip are you running? would like to do this to mine

[@ryanvillanueva9471]

i am having trouble with my throttle cable bracket? what should i do?

[@KooshdaakaaGarage]

Hey Ryan, sorry to hear about the cable bracket. Which part are you having difficulty with? One thing I noticed with the Holley TBI is that the "cruise control" cable will not attach to the TBI linkage. I'm sure it can be modified with a delicate hand but I have not gotten that far yet. Maybe I will trouble shoot that in the future and make a video on it. Are you having the same issue or a different one?

[@ryanvillanueva9471]

@@KooshdaakaaGarage so i have the stock intake manifold with the holley tbi but the throttle bracket does not fit it has no place to mount should i buy an after market bracket if so which one would help?

[@KooshdaakaaGarage]

Are you talking about the bracket that is mounted to the intake manifold and holds the 2 throttle cables (or 1 throttle cable if you do not have cruise control)? If so, my Holley didn't come with a new bracket, I reused the stock bracket and it mounted right into the edlebrock stock location on the manifold. Or are you talking about mounting the throttle cable to the Holley TBI? Mine has 2 throttle cables and only one will fit on the Holley TBI and that is the bottom cable which is controlled by the throttle pedal. The top cable is for cruise control and the plastic shroud mount thing is too thick to mount up up with the bottom throttle cable. I think the video better illustrates what I'm talking about.

[@ryanvillanueva9471]

@@KooshdaakaaGarage my stock bracket for the throttle cable just doesnt but i have found one that bolts the the intake but thank you!

[@KooshdaakaaGarage]

Excellent work muh man!!! Glad you found a solution and can get back on the road 😁🤘

[@jamesryan2918]

Where did you buy your fuel pressure regulator? I’m not finding any that look like this one they look a little different

[@KooshdaakaaGarage]

Thanks for the question James. I picked up the JET 61511 FPR Diaphram from Summit Racing.. www.summitracing.com/parts/JET-61511 Been holding strong the past 2 years I've had it.

[@jamesryan2918]

@@KooshdaakaaGarage dude thank you so much.

[@KooshdaakaaGarage]

Absolutely man!

[@thedobermangang3503]

hey i got a 1990 k5 blazer same engine i just rebuld my engine did a few up grades nothing real big because of the computer i got the same intake as youdo i have 3704 edelbrock and went up on the cam cam xtreme energy cam 434,444 lift 203/212 duration with seperation 112 degrees and i upgraded my torque converter to a 2000 to 2400 stall 410 gears i got 35x12 15 tires on it i have headers msd wires and mds core i got about 950 miles on it so far..i had to get someone to prgram my chip for me because i didnt have any power and it wouldnt idle it would surge up and down and cut off at idle some time..the guy that did my chip he told me to put trillium bosch spark plugs in it..if you change that stock cam its not gonna run right if you decide to do that..

[@KooshdaakaaGarage]

That is a killer setup man! And on a K5 to boot! What do you think of that cam? I'm thinking about something similar in my rig. How do the 410 gears handle with the 35s? I have the performance Jet chip with 6 settings, its setup for a larger cam and higher flowing heads when I finally upgrade them. Until then I just keep it in tow/haul mode which work with the engine mods I have excellently (edlebrock intake manifold, high flow air intake, holley tbi, shorty headers, high flow exhaust, chip).

[@thedobermangang3503]

@@KooshdaakaaGarage you should have put the long tube headers on threre mush better.

[@KooshdaakaaGarage]

@@thedobermangang3503 Long tube is pretty excellent for mid and high range hp. I'd definitely consider it for daily driving or mudding builds. The shortys make excellent bottom to mid range though and that is the sweet spot for my truck. It spends a lot of time crawling up steep mountains at low rpms/ exhaist velocity, loaded down with weight. Thats why I'm going to stick with the swirl port heads too. Great bottom end. I'm going to port match and polish them up a bit though.

[@josephsaucedo8691]

Ya the holly with a jet fuel reg and a air aid spacer and air stack make a good increase in throttle power. Ya the line suck you have to bend to fit and the original senser supplied suck use ac delco sensor definitely nice but not cheap new. 💯👍✌️

[@adaml6458]

Do you know if I need a tbi spacer since my intake manifold is stock? Will the bigger valves on the holley have any clearance issues?

[@KooshdaakaaGarage]

Hello Adam, and thank you for your question. I'd say TBI spacers are optional. You won't need a spacer for the Holley to fit but many report a little bump in performance when a spacer is added. I don't have one installed but I think I'll give one a try to see what it does. The bigger ports on the Holley won't create any clearance issues with the stock manifold, it will bolt directly on.

[@adaml6458]

Awesome! Thank you so much. Was the backfiring issue that you experienced, related to the holley tbi at all, or something separate?

[@KooshdaakaaGarage]

@@adaml6458 no problemo man. The back fire issue is from an exhaust manifold leak. Needs a new gasket 😬

[@adaml6458]

@@KooshdaakaaGarage hey man! Got this 670cfm. Thanks for the video! Definitely dumping fuel like you mentioned though. What fuel pressure regulator diaphragm did you get? I can't seem to find one.

[@KooshdaakaaGarage]

@@adaml6458 Hey man, It's been a while since I've replaced it but I think I went with an OEM one on summit racing. You can find them on amazon for a decent price too like this one: amzn.to/3DXgQsa Or if you wanted to get fancy with the JET version you could try this one: amzn.to/3thn2q8

[@themackguyverchannel7713]

How about replacing those dried out PCV hoses.

[@KooshdaakaaGarage]

In due time.

[@KANDYPONTIAC78]

Did you have to change your throttle cable or any issues with gas pedal sticking?

[@KooshdaakaaGarage]

Hi Brandon. I did not have to change the throttle cable, however there wasn't enough room for the cruise control cable to fit back on there. After a few years I did notice a little bit of throttle plate stick. I think in the future I'll either gently sand down the throttle plates or polish up the side walls so the throttle plates no longer stick.

[@KANDYPONTIAC78]

@@KooshdaakaaGarage thanks for the reply. I called Holley and they advised me to untighen the 4 screws on the plates just a little to see if that would help. I haven't tried it yet but I did notice that the actual gasket on the base plate seems to be hitting the plate (flap) in rear on the driver's side...I even noticed the particles from moving the throttle shaft back and forth. I'm hoping that getting the gasket checked(shaved) will solve my problem. Thanks again.

[@KooshdaakaaGarage]

@@KANDYPONTIAC78 Thanks for the tip! I didn't think of loosening the 4 screws on the plates a little; I'll give that a try as well.

[@paulreis553]

Was it plug and play

[@2pink1stink]

I recently put one of these on my 93' 454 but the vacuum for the TPS seems to stay all the way open, the computer doesn't seem like it likes this TBI and the idle adjust has been dificult. I could really use some help or advice if you have any.

[@KooshdaakaaGarage]

oh man, sorry to hear about the troubles. do you a nice programmed chip to throw in there? I have a jet chip that has 6 options i can switch through, including 2 performance modes, tow haul, economy, and more. your computer might be having difficulties reconciling the additional air and fuel with a stock tune. also i would pull the fuel regulator diaphragm to make sure it isn't ripped or plugged. I had to swap the fuel regulator out on mine a couple years back, pretty easy and cheap thing to do if that turns out to be the problem.

[@2pink1stink]

@@KooshdaakaaGarage turns out I actually had the blue and white crossed with the blue and black wire. That's what I get for working on it at night I guess lol

[@KooshdaakaaGarage]

Glad it was an easy fix!

[@nickvisconti2648]

how did u get the edelbrock air cleaner to fit?

[@KooshdaakaaGarage]

I used the bottom pan from an old k&n air cleaner I think is what I did.

[@nickvisconti2648]

But how did u get that stud in the middle? There’s a bolt in mine… do I take that off and put a stud in that hole and then add height things so I have enough clearance?

[@KooshdaakaaGarage]

@@nickvisconti2648 oh I see what you are saying. Yes, you will need a longer stud. Mine already had a long stud when I purchased the truck. As far as I could tell it was the stock stud that came with the 92'. It still had the stock air cleaner at the time.

[@mikeydejon2148]

Are you running chip also?

[@KooshdaakaaGarage]

Yes, I have the jet 6 stage chip. I usually run it in tow haul or stage 2 works very well with this unit.

[@mikeydejon2148]

@@KooshdaakaaGarage okay thank you summit only has 2 holleys left I ordered stage 1 chip from jet but can't really spend 932 on tbi I can but is it really worth it in your opinion?

[@KooshdaakaaGarage]

@@mikeydejon2148 the tbi and chip combo is definitely worth it if you want some nice added power through the entire rpm range. It took me by surprise when I first installed them, I wasn't quite ready for the seat of the pants power 🤣 I'm happy with it and am going to keep it like this!

[@mikeydejon2148]

@@KooshdaakaaGarage okay I'll probably bite bullet

[@mikeydejon2148]

Did you have to do any modifications to the holes on the intake for this to line up n work correctly?

[@thedobermangang3503]

i saw that one online but i dont think that will work for me because i have a rebuild engine and remodify everything ..

[@KooshdaakaaGarage]

The stage 2 setting should work, its tuned for performance parts with high air flow mods and a 180 degree thermostat. When I use it, it seems like its a bit too much fuel for my Mr goodwrench 350 with a handful of mods. Stage 2 wants the cam and head flow to take full advantage of the tune, its what you would put in an old tbi camero if you were building a fun street rod with a holley tbi, intake, heads, cam, free flowing exhaust. If I were you I would either go straight for the efi setup or I would toss a stage 2 in there to make your engine happier. But the efi would be freakin sweet with what you have setup 🤘

[@oddskies]

Did you notice a big difference in your gas mileage? More power would be great but I'm mostly after better gas mileage in these expensive times and wondering if the money for one of these will be worth it in the long run vs. rebuilding my TBI.

[@KooshdaakaaGarage]

Hello sss and thank you for the question. I didn't really notice a difference too much of a difference in fuel milage. It's been so long I can't really remember what i was getting before but it wasn't too much different than what it's at. This unit will benefit from more air though that is for sure. Air intake, cam, and a nice set if heads or polished heads at that

[@dp1651]

You get better fuel economy with it?

[@KooshdaakaaGarage]

No increase in fuel economy that I seen. I think if I put in a nice cam and did some porting to increase air flow I'd pick up some better economy with that added fuel. I did notice a nice bump in power though 🍻

[@Truth0515]

Where did you get the diaphram from?

[@KooshdaakaaGarage]

Summit racing and jegs carry them for around $15

[@Truth0515]

@@KooshdaakaaGarage so it doesn't haven't to be the Holley version ?

[@KooshdaakaaGarage]

@Jorge-rm6ly nope, just a regular oem diaphragm if you want it to flow the stock psi which I think is 4-6 psi.

[@Truth0515]

@@KooshdaakaaGarage thank you for your reply. I appreciate it.

[@Truth0515]

​@@KooshdaakaaGarage do you have the ported vacuum line capped ?

[@thedobermangang3503]

have you ever bough a high performance chip for your truck

[@KooshdaakaaGarage]

Yes! I have the Jet 6 setting chip in there right now. I usually leave it in tow/haul mode for the boost of bottom end torque.

[@brendansizemore9969]

Would you please leave a link for the exact chip you’ve got?

[@thedobermangang3503]

HEY BUDDY ...IM STILLING WAITING FOR I ENGINE TO GET DONE WAITING THE HEADS TO GET FINISH ..AND THE CAM HE PUT IN MY ENGINE THAT WAS THE WRONE ONE WAS XE 249H AND THE CAM HE WAS SUPPOSE TO PUT IN WAS XE262H SO HOPEFULLY EVERYTHING SHOULD BE GOOD ONCE THE ENGINE IS FINISH I GOOT MY ADJUSTABLE PRESSURE REGULATOR GAUGE SO I CAN SET THE PRESSURE IM UP GRADING MY PRESSURE REGULATOR SPRING AND MY FRIEND GONNSA BURN MY CHIP FOR ME ..I WILL KEEP YOU UP DATED MY BROTHER...

[@KooshdaakaaGarage]

the 249 didn't work for ya huh? Man, that looks like it would be a sweet cam for a chevy 350 truck street and off road crawling. That 262 will be fun too. You building a high tire speed mudder or what??

[@fredcolberg8789]

Might replace that boot on your vacuum line there champ

[@KooshdaakaaGarage]

Lol, hell yeah. Changed the vacuum lines since this video 🍻

[@illustr8phee100]

stock fuel pump right?

[@KooshdaakaaGarage]

Yes, stocker for now. I have my eye on the higher flow fuel pump from the 1996 Silverado for when I pull the bed to do some frame restoration. Do you have an aftermarket pump? Any recommendations?

[@illustr8phee100]

No..I thought about a pump upgrade myself.. just to see . I’m running tbi Harris yellow spring in my fuel regulator for now..

[@W1Ck3Dj3St3R1]

@@illustr8phee100 Get the 96 Vortec pump, it'll bolt right in...

[@111000100101001]

She’s a runner Daddy!

[@arctic3038]

What is your opinion on this tbi unit? Your review so to speak

[@KooshdaakaaGarage]

So far I like the unit. It is a bit pricey to purchase brand new, but it bolts right in place of your stock unit so if you are looking for performance gain without the full EFI conversion then I would say go for it. I'll get into that more when I answer your next comment.

[@arctic3038]

Kooshdaakaa my Holley tbi just showed up in the mail.. I have a stock exhaust manifold but am picking up long tube headers should I wait for the headers or would installing the tbi with a stock exhaust manifold run fine for now?

[@arctic3038]

Kooshdaakaa also which performance chip for the ecu would be good with this tbi?

[@KooshdaakaaGarage]

Hell yeah man, congrats!! You will be perfectly fine with the stock manifolds until your long tubes get in. Which long tubes did you get? I'm looking into getting some myself. TUNED CHIP: Since you already have the new TBI, slap that puppy on and see how it runs without a performance chip. If the stock tune doesn't seem quite right and/or you are going to keep adding air flow mods, peep this 6 pack performance chip made by Jet: I've had this for about 8 years without fault: www.jegs.com/i/Jet/561/292196P/10002/-1?gclid=CjwKCAjwzIH7BRAbEiwAoDxxTq0hduuD3zXTs11BM9ufBoAK2RjPpMGqGQBN73fUQaVa_sQ8qPTOcxoClCoQAvD_BwE

[@KooshdaakaaGarage]

I answered this question in your last comment, but let me elaborate as to why I like the Jet 6 Pack Performance chip. 2 reasons: 1)tow/haul 2) stage 2. Those two settings are my trucks best friend and will allow your truck to account for the additional air & fuel provided by your TBI, long tube headers and additional mods made in the future. Tow Haul makes a noticeable difference on the bottom end torque when hauling my camper around the mountains, and stage 2 is all out hell fire on the street. Plus its nice to be able to lock the tuning in with a key as well as you can set it to "valet" mode which sets the governor at 15mph or you for security purposes you can turn the fuel pump completely off and lock it in that setting until you are ready to change it back. www.jegs.com/i/Jet/561/292196P/10002/-1?gclid=CjwKCAjwzIH7BRAbEiwAoDxxTq0hduuD3zXTs11BM9ufBoAK2RjPpMGqGQBN73fUQaVa_sQ8qPTOcxoClCoQAvD_BwE

[@meyawabdulaziz3863]

that part is made to work with better top end (better camshaft and head if possible) , a honda with 2.2 making 100hp while these TBIs with 5.0 and 5.7 liter are making between 190 to 220hp ? why because of a better induction system , i dont blame GM it must have been regulation issue or something you want this thing to move put a better camshaft in that thing and it will scream

[@KooshdaakaaGarage]

Absolutely bud! Its a work in progress 😁 the good wrench engine in this thing stock makes about 190hp. I have the holley tbi, edlebrock intake manifold, shorty headers, free flow exhaust, and a jet chip with multiple settings. Heads and cams are up next, and will tie it all together 🤘

[@nickwebb9937]

@@KooshdaakaaGarage what power you think it’s making with the upgrades now?

[@KooshdaakaaGarage]

@@nickwebb9937 Comparing it to other builds I've seen who have dyo results, I'd say its in the 300-325 HP range, conservatively, with gobs of torque on the bottom end. A nice roller cam with some port and polish work would probably push it in the 350-400 range.

[@TheBlkac1]

👍🏿👍🏿👍🏿👍🏿👍🏿👍🏿👍🏿👍🏿👋🏾👋🏾✌🏿 I'm gonna see how this set up will do on my 1992 Chevy G20 Van 😁😎😁

[@KooshdaakaaGarage]

That will be one badass Van :D !!!

[@TheBlkac1]

@@KooshdaakaaGarage 😁hey I certainly hope that it will after seeing how well your trucks take off was. That's how I want my van to respond when I accelerate to get on the highway 👍🏿😁

[@TheBlkac1]

@@KooshdaakaaGarage Hey🤔 will this fit my stock intake? ✌🏿

[@TheBlkac1]

Will that Holley TBI fit the stock manifold on the Chevy 5.7 350🤔🤔🤔

[@KooshdaakaaGarage]

It will fit the stock intake manifold! Sorry for the late reply

[@thedobermangang3503]

HEY I GOT BAD NEWS FOR YOU MY BROTHER.....I HAD TO TAKE MY ENGINE BACK OUT THAT MY FRIEND REBUILD FROM THE CRANK ON UP HE FUCK UP SOME WHERE IT WAS BLOWING BLUE SMOKE AND HE PUT THE WRONE CAM IN MY ENGINE I WERE USING A QUART OF OIL EVRY 250 MILES..IM GETTING IT RE DONE NOW I HAD OIL ON #7 SPARK PLUGS ..I PUT ABOUT 2000 MILES ON IT..

[@KooshdaakaaGarage]

Ah shiiiiieeeet man, that blows! Which cam did he put in? Did he get the right size snap rings in there? Almost sounds like the oil isn't draining and is getting caught up in the piston. Either way at least it can be fixed!!!!

[@thedobermangang3503]

good video my brother

[@KooshdaakaaGarage]

Thanks brudda!

[@larrybarber8815]

I’m putting it on a 98 I will let. You know

[@KooshdaakaaGarage]

This will pair nicely with those vortec heads 🤘

[@shadowopsairman1583]

Leave the EFI on the vortec alone. Different computers/wiring etc are used on 96-99.

[@darinr9424]

had one. even with the proper intake that doesnt require an adapter to make it fit. its not worth it. yea it works but for the money? put a 650 carb and a junkyard large cap hei dist on it and blow away that throttle body by a long friggin ways. the factory ecu if pretty intolerant of these changes. it will run ok. but the for the money and time for the returns its a complete waste. been there and made that mistake

[@KooshdaakaaGarage]

For sure. And with EFI technology developing to the point that it has and becoming more affordable to the average Joe, old carbs and tbi's are a thing of the past in regards to performance unless one is trying to keep their project as stock as possible or finds a cheap used carb or tbi.

[@glastornjet73]

Just get a set of tuned port corvette aluminum heads dont mess with those that is the worst set of heads gm ever cast! And put some flat tops in it

[@KooshdaakaaGarage]

These swirl ports are the best flowing heads under 4500 rpm in stock form and best under 5500 with proper mods. Best bottom end torque monster heads gm put out. They used old diesel swirl technology that is still used in diesels today. Corvette heads are probably really nice for street and lower 48 driving but this truck needs to perform in low rpms up steep grade mountains on old logging roads 🍻🥳 when I finally get my old hot rod car, I'll get me some of those corvette heads for street fun 🤘🤘🤘 thanks for the recommendation!

[@glastornjet73]

@@KooshdaakaaGarage ummmm i dont even know how to reply to this the these heads are not the best at anything other than keeping your boat in one spot on the water with a chain welded to them... engine rpm has nothing to to with head flow heads flow the same at 10k rpm as they do at idle valve lift is what changes head flow and a small 175cc intake port with with a 2” valve would make a great torque head remember what the tuned port heads heads came on? Yeah a tuned port they ran out of steam at 4000 rpm and made TONS of torque from idle to 4000 just what you are looking for! But that being said the heads have way less to do with torque than cam and intake selection do... my buddy built a 406 for his 92 chevy 2500 with ported dart pro 1 aluminum heads (way bigger than stock tpi heads) and a performer carb manifold with a adapter plate and a 52mm bored tbi unit with the proper cam selection for the application! that thing will pull a house down i used it to pull an all steel 20’ car trailer and my crx and you literally cant tell its back there its easy double the hp of the 350tbi the heads cam and tbi unit flow are the limiting factor of a tbi engine! Believe it or not the stock intake flow Quite well and a aftermarket is not needed according to tbichips.com and the throttle body boring guy

[@KooshdaakaaGarage]

All very valid points my man! I have no doubt about what you say with the exception of rpms not making a difference. What I'm after is maximizing velocity of exhaust flow at low rpms. The amount of exhaust flow at 1200 rpms will be different than 6000 rpms. Turbo applications make this point. My turbo on my lb7 doesn't spool up at 1200 rpms, it doesn't have the velocity too... but it spools amazing at 1600 and gets better with higher rpms/higher velocity exhaust gases. We don't want too big of ports on an engine that needs to perform at or under 2500 rpms with a truck and camper climbing old logging roads. The huge ports will kill the velocity which destroys scavenging. That's where the swirl ports excel. Tow/haul and fuel economy. And when the cfms are measured they actually are close to rhe old double humps. What I have slated for 5bis truck is a port match job all the way through and a nice mild roller cam. The ole girl will be a nice wood hauling, camping hauling alaskan mountain beast! Old HeadBytes (an old school KZbin hot rod performance port and polish master) loves these old heads for truck application. I love them too for up in mountains, having used them as well as other trucks. Point is.. I own them. They flow great and make tons of power on the bottom to mid range, is great for camper hauling up steep grades, and if I mess up the port job and need new heads, I'll take you up on your advice and give it a shot 🤘🙂

[@KooshdaakaaGarage]

@@glastornjet73 forgot to say. Totally agree with the stock cams being weak AF. They bog everything else down. And they are flat tappet to boot. Luckily the 92s as well as the mr goodwrench short block I put in this thing about 11 years ago has the provisions for roller cams. I'm thinking a nice mild yet high velocity on the low to mid range comp cam like the 08-408-8. Or I remember seeing a 4x4 series a few years back, the 411 looked like a nice fast ramping roller cam capable of decent velocity for low rpm mountain crawling.

[@jeremystory6981]

😮😮😮

[@thedobermangang3503]

to remodify that chip they want $500 i didnt think it cost that mush they going to make a chip for me and ship it to me and i send them my old one..they are in littleton colorado ...the name is command performance engineering .dont no if you heard of them or not...the people at edelbrock told me about them..you cant find to many people that does that,

[@KooshdaakaaGarage]

Damn, $500!!! Thats spendy. Might as well save a few more bucks for a new efi setup. Have you looked into the jet chips? Mine is a 6 stage on a selector switch. It has: economy mod, tow/haul, stage 1, stage 2, then some security settings like valet parking (sets the governor at 15mph) and a setting that will cut power to your fuel pump so no one can steal your truck. The selector switch comes with a key so you can lock in your setting. Its been a few years since I bought it bit I think it was between $250-$300

[@shadowopsairman1583]

Find a TPI intake

[@KooshdaakaaGarage]

Classic. Those things are pretty rad.

[@chuckchuckf.l.o.w4131]

Lol come help me fix mine

[@jeremystory6981]

Uu mis her

[@KooshdaakaaGarage]

Yes

[@darinr9424]

wouldnt mind tryin a dual quad intake and run a pair of the tbi units with a holley computer.or a tri 2 barrel setup with 3 factory tbi. yea there are nice kits out there for 4 barrel setups. but i think it would look pretty darn cool.

[@ScooterLee-ei1ep]

Why? Tbi is not for great for hp. Yes it can be done but the amount of money you would spend would far surpass a dual carb set up

[@darinr9424]

@@ScooterLee-ei1ep very true.. and I agree ...it would be just a cool type thing to do.but a dual tbi can support 500 ish hp. A single unit is good to about 260-270 tops.