327 Chevy on the DYNO - Exhaust Shootout

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Nick loves all kinds of classic cars and the engines that power them. Today, he will show us a big red Impala that is in the shop for a refresh and an engine rebuild. Time to dyno test the 327 that will help the Chevy cruise in style.
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[@georgekaratapios7246]

I would like thank everybody for there comments, and did get the ram horn exhaust manifolds Thank you everybody

[@trentdawg2832]

Beautiful car !!!

[@leroyll1144]

Awesome you won't be disappointed for getting them

[@georgekaratapios7246]

Thank you

[@613Builds]

Good old ram horns 🐏 🔥 I like the ramhorns that slant back on a 45 😎

[@BuzzLOLOL]

Think you would like 2 sizes smaller cam... this race cam miserable for a cruiser...

[@nickpanaritis4122]

After reading so many comments, my client has decided to order a set of Ram Horns manifolds.

[@unclequack5445]

Nick you really are the man nothing but respect Sir.

[@SurlyMike]

That is good to hear. My 66 Impala only has a 283 but I recently built it 30 over with about the same cam, 500 lift only difference. I got a smoking deal on some rebuilt 80s 305 H.O. heads that gave me bigger valves and higher compression, not to mention OEM hardened valve seats. I still run the ram horn manifolds and that allows for the stock alternator mounting. I did block off that down draft tube and went with a PVC setup. I'd like to see if you incorporate a PVC and still keep those valve covers.

[@gordowg1wg145]

Good move - which version? The usually used ones were a 2" outlet, the 'Vette versions used a 2 1/2" outlet and are generally the ones to go for. I think most repro' stuff is the latter.

[@davidsnova]

I love the video you made and stated " 400 small block , not a very popular motor" The 400 sbc only paved the way for the 434 ,377,and 383. . And the Oldsmobile 350 build was hilarious 400 hp was a modest number for that one. Let's not even talk about the 455 stage 1 Buick , laughable man. keep the funny vids coming.

[@craigd2599]

@@davidsnova 400 SB was a unicorn. It sucked. Everything you described was because they only used the block. Nick has forgotten more about engines than you'll ever know, troll

[@martinwallingford3773]

My Great Aunt had a 275 hp 327 in her 1967 Impala, man was that thing smooth.

[@charlesdavis4741]

67 first year quadrajet car.

[@brianwaldo2642]

Back in the 70’s I had a ‘68 Camaro SS with the 327 and 2:73 rear end. It was white with a black nose stripe, black vinyl roof and red interior. The tires were BFG T/A’s on aluminum slotted wheels. After graduating from college, my buddy and I drove it from Hamilton to Vancouver to LA and back in the span of 6 weeks. We didn’t have one hiccup with that car. I sold it in the early ‘80’s and have regretted it ever since.

[@bluecollar58]

One of the prettiest cars ever made in my opinion.

[@tedcorey3054]

My Grandfather had a '64 Impala SS ,triple black ,327 .Bought it new . I loved that car , first time I went over 70 mph was in it . I guess I was about 10 or 12 years old .When he mentioned to me that he was planning on trading it in I begged my Dad to buy it . His response was "I can't afford that car". That was 7 or 8 years after my Dad sold his '55 bel air to buy our house . That apartment wasn't that bad .

[@BuzzLOLOL]

Yeah, gotta sacrifice for the car you want... LOL !

[@kustomdeluxe8489]

Started putting together a 327 out of parts I've had since 1981, better late than never.

[@NicksGarage]

Right on. No time like the present.

[@BuzzLOLOL]

If it's a street driver, don't go as big a cam as used here...

[@dannybeeler9817]

Double hump heads are worth 50 hp

[@bertkilborne6464]

I did the same - Built a 327 for my truck. I was pretty surprised that with a small cam with 204 @.050 intake duration, the 327 still is happy at higher RPMs. Headers +.060 overbore - decked block - smogger heads - Quadrajet It's fun - Not octane sensitive at all... Bout 8.5:1 CR

[@kennyjfarquhar954]

@@BuzzLOLOL go away bud lol not getting the attention you crave here... We get it . You look your cars slower and less aggressive sounding .

[@jwilliams5107]

Back in 66 my brother bought a 65 Impala SS, 327/300HP, 4 speed with a posi. He was worried it would get stolen. He took off the 327 badges and replaced them with 283. That was a very nice car. Very fast.

[@NicksGarage]

Nice trick.

[@jgriffin7340]

My friend in high school had a 65 Impala with a 327, 4 speed, posi. But, that was 1988, the elements were not being nice. The rear springs ripped off the frame about the time he dropped the clutch in 3rd gear, rolling about 40-50mph. What ensued was the longest, most amusing crash I’ve been involved in. Seems like it took a full minute for it to spin all the way around in two lanes and median, grass flying around, him cursing and fighting that massive steering wheel

[@hopebrowning6300]

Lots of 327 hype .reality there not that good, A plain 350 built can get more power and they can't touch a 383 or 406 no matter what go fast parts you put in them, if the same parts go in something with a bigger bore and longer stroke , its not going to come to close or compare

[@stevenphilpott1493]

Had a 68 malibu 2dr with a 327 275hp with a powerglide. I was in the Navy in 1976 and drove the wheels of that car. Nice smooth driving car. sold it to by a 69 ss396,350 horse 4spd. wish i still had both!

[@olskool3967]

i grew up on my daddy's used car lot on the 60s-70s i got to drive and own a lot of cars. i became a professional transmission rebuilder and shop owner. i retired 2 years ago but still build a few now and then. i have a super nice 1986 monte carlo ss it is painted cyber grey,,,,,,,,,,,,,,,,,,,,,,

[@donlemme898]

My first muscle car experience was age eleven in 1966 when my brother came home on leave with his new ‘66 Chevy II, 327 350hp. One power shift and I’ve been hooked on cars ever since that time. Have a great week everyone

[@BuzzLOLOL]

The '67 Camaro cried out for that engine, too bad it wasn't an option...

[@robertdavis8010]

Those little Chevy II's would blow your mind with a 327 with cast iron manifolds. I'm a big block man, but I knew those little cars were something that could ruin your day. Lol

[@Dayandcounting]

@@BuzzLOLOL It got the 302 which was is based off an even hotter 327 the L74, just with a 283 crank. The L79 would be stroked and became the L46 350/350 exclusive the Corvette. That Chevy parts bin isn't as big as most often think. The L79 was the solid lifter short block and heads(2.02) with a decent cam vs the plebeian standard 4bbl cam. The challenge Chevy had was the SBC didn't have great flowing heads so they leaned on the cams so rougher running more stall prone mills if they wanted power. You don't see the first decent factory head until '71 on the LT1 350. Perhaps over looked is that it introduced the 350 exclusive to the SS350 Camaro in '67, that stroke and more importantly the extra torque was something felt in every test drive. So much that with similar gearing it matched the 302 in acceleration at least until the headers and slicks went on.

[@BuzzLOLOL]

@@Dayandcounting - The first Chevy 302" were the '301's we made by overboring a 1950's 283... The small, light. streamlined '67 Camaro really should have had the L79 as its top engine option... but that would have been too much power/speed too soon for GM... and the rear suspension would have had to been better from the start... also, like the Fiero, Camaro was prolly first sold to GM as an 'economy' car... LOL! Chevy heads didn't flow bad for the time... a little 327 with 4 bbl. carb., base level cam, and 10:1 made 300 HP... everybody else back then needed lots more cubes to make 300 HP... Chevy's base 1.94" intake valves were bigger than Pontiac's hyper 1.92" intake valves... eventually everybody's small blocks got up to Chevy's hyper 2.02"/1.60" 'Fuely' valve sizes... except the Ford Windsor engines...

[@Dayandcounting]

@@BuzzLOLOL The top engine was the solid lifter 396 rated at 375hp (420hp actual). The '67 also came from the factory with a traction bar.

[@carlhobbs6109]

My brother had a 1967 Chevy II with a 327 4 speed back in the mid 1970's. I got the car from him around 1985. It had the small journal 327, it took 11/32 rod bolts and smaller rod and main bearings. I know that I would get some weird looks sometimes when I'd tell people that it had the small journal 327 in it. It had a front sump oil pan too! It took its own special oil pump, pick up tube and oil pump drive because of the front sump oil pan. Wish I still had it! My brother wishes that he would have kept it too!!

[@bobthbldr3]

In 1962 I ordered a new Impala with a 300 hp 327 and 4 speed. I ran at the local drag strip every Sunday. It came with 2.5 inch exhaust with the rams horns manifolds and I had open exhaust dumps welded on. I put on a set of Hedman headers and made no difference at all in et's or mph. Some rams horn manifolds were smaller though. I won 23 trophies with that car and it was legally stock and had a blast with it!

[@markraday8071]

I had a 68 Chevelle with a 327 with a rock crusher 4 speed. I bought it from my uncle it was red with black interior. I put a factory cam in it OEM 375 horse Corvette Cam a dual point distributor with a mechanical drive tach a set of Hooker headers and a 650 Holley spread bore with mechanical secondaries and man that car was the fastest car in town all anyone ever saw was tail lights 💯💪. Boy I sure miss that car

[@jeremyr6576]

My first car/truck was an '83 S-15 GMC pickup. It had a 2.8L V6 in it. It let go one day after about 173K miles, and the truck just sat. A buddy of mine had a 327 sitting around out of his dad's long-gone Corvette (not sure what year since I was just a kid, and not sure what trans it was bolted to). We decided to force it into my old truck one day. It took a couple of high school summer weeks, but we got it running pretty good. The fun didn't last too long. After a few pulls and his dad helping us tune the carb (I think it was a 4bbl Edelbrock) , our home-shop mods to the drive shaft let go. The fun ended there, but what memories. Knowing what I know now, with the resources I have....that would/could have been sooo much more fun....and probably trouble, for a youngster. LOL

[@sithlordjeffbledsoe651]

My granddad had a 283 in a 67 Chevy pickup with the front fill breather he was constantly replacing the Crome cap. I put a block off on and got 350 style valve covers with the breather on the covers never had another problem.

[@daxtonbrown]

I just got the rebuilt 327 in my 67 Camaro running! It's hot as a pistol, sounds like an angry panther.

[@BuzzLOLOL]

'67 Camaro cried out for the unavailable 350 HP 327" engine option!

[@Dayandcounting]

Pretty sure that car should have come with the ram horn manifolds which are good flowing. You can get a reproduction sets for ~$200 US 2.5" pipe.

[@NicksGarage]

Perhaps the customer will decide to go that way.

[@richardworsley8591]

My 66 Impala convertible had the 275 horse 327 with Ram horn manifolds, I'm sure they breathe better than the smoggers you're running

[@saxmusicmail]

The little engines that could... 327 Chevys, 273-4bbl Mopars, 289 Fords... always liked how the little engines ran putting out way better performance than you'd suspect for the cubic inches.

[@karlsracing8422]

And they can take a beating.

[@johnsonjeremiah74]

318's and 340's were way better engines than the 273. Only thing good from a 273 was it was reliable. It couldn't make power even if you paid it. That's why it would run forever. It couldn't produce enough compression to blow up.

[@HawklordLI]

Don't forget the Studebaker 289 (not a Ford).

[@BuzzLOLOL]

@@johnsonjeremiah74 - Hyper 273 had a snotty exhaust sound!

[@basilcarroll9729]

High compression 330 Olds!

[@aaroncooper8821]

We had a 66 impala SS with all original papers. It was listed as 275hp with single exhaust, if dual exhaust it was 300hp. Using this paperwork and many other sources this engine had the "300hp" cam which would later be used in the l48 350's of the 70's. I know this is an old video but Nick's Garage is historical documentation for furure generations!

[@fragman21]

He really needs that PCV. You and I both know it. Crank case pressure is a horsepower killer! Exhaust evac systems that put negative pressure on the crank case are all the rage these days.

[@jimmybraden3334]

well, it does have a breather in the front of the intake.. at stock engine HP, exhaust evac doesnt do much.. especially if hes goona use manifiolds.

[@nickpanaritis4122]

We installed and a new breather tube that is equipped with a PCV valve set up.

[@tahcogunworks]

PCV does nothing at WOT. There is less than 1 inch of vacuum. That's why you have a breather on the other valve cover to vent under high loads.

[@mpedward2]

The GM 327 was used in many things cars..trucks..even farm equipment! I seen one in a combine..a welder..a water pump. Even air raid siren! Great engine for its time.

[@BuzzLOLOL]

Also the 225 HP Mercruiser marine 327 engine... and seen a 327 in a large telephone company bucket truck...

[@kennyjfarquhar954]

I got mine out of a short bus...

[@lewispaine4589]

I wonder if a set of 2 1/2" "ram's horns" manifolds would have done better than the stock manifolds you used. I'm pretty sure the 2 1/2" were used on the Corvettes for quite a few years

[@redband6011]

I agree. The rams horns, especially the 2 1/2" Corvettes flowed better than the later manifolds. In fact, his 66 Impala would have had rams horns on it from the factory.

[@davidhansbury6247]

Absolutely, we ran those in oval track racing for years, because the rule required factory manifold's... Now, send them to brazinski to be hogged out and flowed, I'll put them up against ANY aftermarket header.!!

[@GwynnOak1]

Bingo! My thought exactly! Those junk manifolds killing that 327.

[@johncornell3665]

Yes those ram's horns manifolds flowed fairly well for stock manifolds

[@johnrafferty5266]

Yes I also ran circle track and rams horns flowed better so they were outlawed in stock classes as they made more power.

[@stevecr8934]

Be proud George. 327 was the motor everyone on the street tried to beat. My 2 best motors DZ 302 n a 327 with double hump heads. 25HP is about right for header gain.

[@edpetrikk2027]

When I see Nick in the control room it looks like someone in front of a mixing board creating sweet music ..👍😁

[@Wildstar40]

Nick's Engine Synthesizer !

[@hotpuppy1]

One thing to note to the owner: find a set of plug heat shields to use with the manifolds. Those log manifolds will cook the plug boots without them---I know from experience. Vette rams horns with angle dumps might fit and give better performance. They have 2.5 inch outlets. Those old Impalas used rams horns so they should fit OK. Older blocks had the road draft tube at the back of the block next to the distributor. California emissions had PVC valve mounted in that hole instead of the road draft tube. "Later" (relative term) blocks lost the hole in the rear and needed the hole on the valve cover. Frequently people would put a freeze plug in the road draft hole on early blocks and use vented valve covers. Oil fill and breather intake stayed on the front of the intake until 1969 when the inlet went to the opposite valve cover. That made sure that the vapors were pulled from one side of the engine to the other.

[@joevette6290]

I have 8mm wires and no shields on my vette and never had that problem you mentioned about melting the plug boots????????

[@kennyjfarquhar954]

wow thank you.Great info.

[@robertorhymes]

This 327 is a real screamer It's gonna make you a true Chevrolet believer Nick's Garage is on the case to make sure this engine has the pace to win the race It's going in a 66 Impala that's red on red that looks so sweet it's got all the street cred It's gonna be a real smooth ride With the new padding in the seat George can just relax and glide This block is unmolested will it outperform what the manufacturer suggested? Only way to find out is to get it Dyno tested!

[@NicksGarage]

Right on, Roberto! 👏

[@robertorhymes]

@@NicksGarage All the rhymes started with you though my bro

[@jeffalexander544]

Would love to see a 70’ white Cuda next to 70’ white Kowalski. 💪🏻

[@CORVAIRWILD]

We bought a Cordoba in 1975. 440 was still available. 318 was a no cost or credit. I tryed to get mom to go for the 400 4bbl w duals. No Cats on Chrysler in '75 like GM. Mopar got them in '76

[@lukepokrajac1057]

400 4bbl would have been a good choice!

[@ms01885]

This type exhaust manifolds did come on the car. It came with center dump 2 inch

[@richdorak1547]

Ya gotta admit that the 327 was a freak , an anomaly and a legend . The creation of a genius gone slightly mad. Top 5 greatest ever.

[@craigdoriety9798]

Still have one in my Nova. I am restoring it and many are suggesting I go with something larger. It was originally a straight 6 so I wouldn't be hurting the originality of it. That little 327 is very responsive though.

[@richdorak1547]

@@craigdoriety9798 ya gotta keep the story going and watch the smiles people get when they see one again !

[@tedheierman1181]

You can't compare this to an engine with a drivetrain and accessories installed! But, I appreciate videos!

[@BuzzLOLOL]

You can "compare" it... realizing the differences you may be adding... or not...

[@craigpennington1251]

The 327s that I had were full race Nascar type. 7 grand every gear. All cast iron too Gas guzzlers but GO GO GO. Man did they sound sweet with header 3 1/2 inch collectors an H pipe @4"back then a 1 3/4"x12" opening at the end of exhaust on a 45 degree angle setup with a taper out from the H pipe. 1968 Camaro Group IV. 4 speed trans. I did one season with it. Very good engines.

[@buckeyduck]

George won't notice the horsepower change but if he was driving with the headers, he will definitely notice the drop in 40 lbs of torque.

[@BuzzLOLOL]

He'll also notice the cam is too big and peaky...

[@oldpolak5203]

Nick , you made my day by sharing your first car story that involved your dad . My dad bought me my first car too . It was a 66 Rambler American 440 convertible.

[@karrpilot7092]

I took a 327 out of a 1968 Impala, had it rebuilt, and put it into my 1978 Caprice. The 2.56 rear gear killed the performance. But after it got going, there wasn't much that could touch it.

[@paulmallery6719]

100mph in low gear or reverse with a 2 speed power glide

[@hopebrowning6300]

Had a olds omega with a Pontiac 455, same 2.55 gears .that big block worked great with the Pontiac engine. Don't no how , many street races won other drivers couldn't figure it out either for many of years .still gets brought up in talks all these years later .about 55 in first, little over 90 in second, about 2 inch past 120 then bouncing Speedo in drive/3rd.guessing 140 or so going by the space apast the 120 mark.Big block fords, other gm, low 373-411 gears cars , mopars , etc couldn't touch it.never beat in it.most would get me out of the hole , by the times I shift to 2nd I'd be fender to a door a head , end of the 1/4, 1 to 6 cars ahead , ebery time, every race .quite, no cam sound, A total sleeper. Most don't believe it but the 8 or so people still alive that raced against it or witness it run vouch for it.wish phone videos would been available back then

[@stevejohnson7132]

A classic Chevy is a classic American car and you really can't beat red on red. Thanks for showing this beauty Nick.

[@NicksGarage]

Thanks Steve.

[@mgcarr61camaro91]

Nice to hear some of your stories when you were younger! Especially how you got so involved in cars !👍👍

[@themackguyverchannel7713]

Be nice to see what she’d do with the old ram horn manifolds.

[@NicksGarage]

Maybe we will get to do that test some day.

[@nerradnosnhoj5122]

@@NicksGarage that would be interesting , Ram horn manifold with 2-1/2 " pipes , 1966 Chev Impala would have the Ram Horn manifold

[@nerradnosnhoj5122]

@@FrankF-vp4pt when using headers , I had gaskets and used Ultra copper sealant on both sides , heat cycle and retorque , do not bend flanges , heat cycle and re check, drive a day and recheck, do this a few times after instalation and al should be fine, unless you hit curbs etc. I had a set on a 55 Chevy and no leaks for 27 years, I only put on about 10,000 miles but still , all good and no ceramic coat either

[@superkillr]

@@FrankF-vp4pt Cheap headers have thin flanges, and nobody builds a cheaper header than for a Chev small block.

[@Ray56z]

@@FrankF-vp4pt Never had a header leak in my life. Dozens and dozens of cars, pickups, trucks, V8 inboards, transverse-4 Yamahas, tractors, agricultural equipment.

[@Ghostdog4]

Imagine being the guy who owns that vehicle watching Nick himself tuning your engine! That's like having a video of the Pope blessing your Rosary Beads.

[@NicksGarage]

Haha! Love that.

[@dennyray69123]

I had a rebuilt 283 . The guy that rebuilt in 1972 was Les Stadel . Not that much power. But soo balanced that we never did accidently blow it up. 2 clutches though. Best little motor ever.

[@billjamison2877]

Nick, in 1968, my dad bought a '68 Impala 2 door with a 327. Loved that car! When I turn 16, he let me drive it ONE time! I ended up with a '64 Dodge 330 as my first car! I wish I still had it! It would be a great build today with a 426 Wedge !Bill from Linglestown Pennsylvania

[@NicksGarage]

Thanks for sharing!

[@Frank-pe9pk]

Hey Nick great video. During the mid 70’s I had two 67 and one 66 Chevy ll. One was a wagon that was a 6 banger and 3 on the tree. My dad and I found 327 and 4 speed that we removed from a wrecked 63 Corvette. What a sleeper that was.

[@NicksGarage]

Very cool!

[@paulhare662]

Sweet combination. Had a 65 two door, Vette 327 & 4 speed. Ran 14.0 crossing the finish line in 3rd gear. Got 22 MPG too.

[@TheMotorick]

The 60's Impalas are so beautiful to me. In high school in the 70's, a friend drove his parent's Impala to school.

[@OlSgtLove]

Hey Nick , me and the Chevy Impala a 1966 to be exact have a Love - Hate Relationship....back when I was growing up ,in 1969 . I came out of my neighbor's driveway on my Firestone GTO bicycle, not looking and got hit by a red 1966 hardtop Impala with a Mom and her kids right after school , she was running about 35 mph .. Luckily I hit on the right side of the front highlights & hood . Well....me and the old GTO Bike went over the hood ,came down the passenger side ...I took the passenger mirror off with my back , when I hit the mirror ,it shot me and my bike about 25 feet into the driveway I came out of ...talk about rocket man ...The mom slam on brakes, stopped ,got out all upset ..Again my Guardian Angel was working overtime .. I came out with a bad bruised back , skinned up knees, hands ,and legs. No broken bones ,or any other injuries...So ever since then I have a high Respect for 1966 Impala's ...It's a true story .. my ol GTO bicycle was no worse the wear ...later in 1978, I got a 1970 Red GTO with black interior, tac on the hood and RAM AIR 400 ....Those were the days ..10 feet tall and bullet proof .. lolololol...love your channel Nick and George...God Bless .

[@NicksGarage]

Wow, Sarge.. You know how to take a hit!

[@OlSgtLove]

@@NicksGarage Yeah ,fortunately.....like the Timex watch ...keep ticking as long as we can .lolololol

[@Godscountry2732]

A friend of mine had a early 4 speed Nova with the carbureted L76 327 365 hp.The car surprised me ,in that the the engine felt much bigger than it was.If he had told me it was a 396 375 hp I would have believed him.

[@DANTHETUBEMAN]

That's a solid lifter cam, perfect for this motor

[@BuzzLOLOL]

Your friend may have had the available L79 350 HP 327" hydraulic lifters engine that ran about as well as the L76... get it up to 2500 RPMs and it 'came on the cam' and exploding into HP !!! The little 3 valve 280" V8 in 2006 & up Mustangs also is surprising and feels like a big block engine!

[@Godscountry2732]

@BuzzLOLOL The L79 was identical to the L76 minus the flat tappet camshaft in the L76.

[@derekbowbrick6233]

Bon Jour/Good Day, nice to see the little "mouse" motor on the dyno.

[@NicksGarage]

This mouse roars!

[@Smurphenstein]

I love the way Nick has so much care for the engines on his dyno. Checks for oil leaks, brings them up to operating temperature and makes sure everything is fine before running them up.

[@4ondflor]

Those Chevy valve covers are stunning - I love that font! That motor looks too good to run, like a piece of jewellery!

[@NebukedNezzer]

I like the ram horn factory exhaust manifolds. I had a 327 from a 69 impala with 2 barrel carb, turbo 350 trans. put it in my 60 chevy station wagon. worked very nicely for family car/boat puller. peanut carter was president and 55mph speed limit. my car would do 20mpg at 55mph and I was happy with that.

[@timothymilam732]

I agree with everyone that's mentioned the bigger set of rams horn manifolds, and 66 should've been stock for that year. They flow whole lot better than the log manifolds will ever be able to. Plus Jegs has even bigger ones that are very close to original factory set as far as looks go, but have bigger runners. I don't remember seeing the dump pipe off the back of the intake manifold that vents oil vapor an such from those blocks. That engine was rated at 275 @ 4800 rpms, and 355 lbs torque @ 2800 rpm with a 750 cfm spread bore quadrajet carburetor on it. It's a wonder that little mouse motor could move that lead sled as well as it does, but then it does have 80 lbs of torque more than it has horse power.

[@stevemacdaddy9909]

I'm 53 now, but when I was 17 I bought a 66 impala ss for 800dollars. Being young and crazy the first thing I did was put a Holley 4barrel and headers. Bullet mufflers. The car had double hump heads and ran like a scalded dog for a led sled. It was rusty ,primer fenders and a grey rebel flag with stars in primer on the roof. It was supposed to be 325 horse. The carb and headers really seemed to work good. Great video sir.

[@markanthony3275]

As a young man I bought a 62 Pontiac Parisienne 4 door that had a 327 in it. Upon further inspection i saw that it had a Carter 4 barrel carb, dual exhaust , and a fan that only turned when engine temp came up. Hmm...I dug in the glove box and found the owner's manual...it turns out that it was the factory motor for the car , but was the same spec as the 300 hp 10 1/2 -1 compression , Corvette motor...1962 being the first year for 327. You never know where you'll find those 327's.

[@BuzzLOLOL]

Canadian Pontiacs are Chevy's with shortened Pontiac-look bodies...

[@mdouglaswray]

That Impala's owner loves that car and spoils it just like he would a girlfriend. Just different jewelry. True love like that never dies.

[@seekingtruth9182]

Oh wow...327...don't see many of those any more...can't wait to watch this!!

[@mariosaccoccio1688]

I had a '70 Cuda, blue on blue, white rag top. Nice car! I wanted the Hemi, with the shaker, but I ran out of cash & had to settle for the 383. My first new car, I was 17!

[@eugenecastles7475]

Good afternoon, Nick, I'm anxious to see what kind of power the 327 makes on the dyno, and the difference between header, and stock exhaust manifolds. The 327 was Chevy's bread and butter engine that was widely used in all of GM's cars and trucks. Here we go!!!

[@NicksGarage]

We shall see.. the dyno reveals all. Glad to have you with us again!

[@MichaelandCathy1999]

It’s still being used, it’s the 5.3 liter engine Chevrolet still uses.

[@tomboone201]

323.42 cid

[@eugenecastles7475]

@@NicksGarage I'm glad to be here, just have to keep reminding myself that it is in the afternoon now, lol. The 327 made very respectable power even with the stock exhaust manifolds. George will have a very nice cruiser when the car is finished.

[@eugenecastles7475]

@@MichaelandCathy1999 You are comparing apples to oranges. The Gen 3 5.3L Vortec is a totally different engine than the Gen 1 small block Chevy. Nothing about them is similar at all. The 5.3 is 325 cu in, and has a completely different bore and stroke than the 327. The 5.3 has 6 bolt mains, and most 327 engines were 2 bolt mains, except for the HP versions in the Corvette that had 4 bolt mains. The head design is also different, the 5.3 has aluminum cathedral port intake design, and the 327 has cast iron heads with a rectangular intake port. I have a 5.3 in my 2003 Silverado, a way different engine than I had in my 1964 Chevelle that had a 250 HP 327.

[@RealWorldGarage]

It’s amazing how this thing sounded when you fired it up. It sounds exactly like mine. Very similar set up. And yes we’re running cast iron manifolds. Great job Nick!

[@woof3598]

same here, old iron manifolds to keep it looking stock

[@charlessmith7780]

I've had several 327 motors in my 60 years and found this motor to be very responsive and almost indestructible one of the best motors Chevy made I wish like alot of us older gear heads say had the cars back that just them motors were in

[@TruthPoliceLegend]

My first vette a 65 327/365 four speed with 4:11. So much fun and 0-80 through the gears was always fun. They were like little race engines and sounded like it. Some of GMs finest days back then.

[@charlessmith7780]

When big blocks were reigning the race car scene at the dirt tracks we blew ours up one of our friends with the pitcrew had a 69 chevell with a 327 in it and we jerked the motor out of it and installed it in the stock car and went out and won the feature with it , and it sounded like a bumble bee against those big blocks but it was funny 😳 👍

[@tonyprice5344]

Nowadays BB Corvettes are bringing big money. But the Corvette was never designed for a BB. The SB was much lighter so handling was much better with less weight on the frontend. Properly tuned a 327 didn't give all that much away to the BB of the time. I was sad to see the 327 go away.

[@renegade44040]

No better way to spend a very wet and stormy Monday. The rain is really coming down on DelNorte CA but it doesn't seem so bad when Nick is Dyno testing a customers engine on You Tube.

[@NicksGarage]

Just washing the streets for better summer cruising.

[@missesmew]

Always remember my uncles 67 Malabou, 327, four speed, tuned up. Used to surprise a lot of cars. Nice and light with plenty of snap.

[@artvainio9972]

We had a 1966 Bel-Air ,283 loved it totally awesome !!!!

[@RL-xb4gz]

327 396 my favorite engine's of all time.

[@jeffreyrubish347]

Old car wiring sure is less complex than new car wiring.

[@NicksGarage]

Truth!

[@wildbill5670]

Back when I was in high school (Class of 1970) if you had a 327 you were a bad ass. If you had a 427 you were a god.

[@hopebrowning6300]

Nah..my parts of the woods 455 Pontiac beat them all in the old days

[@frogwizard5637]

Let's see some super-high revs from that little bowtie 327! Let's Go Nick! Hey George!

[@NicksGarage]

Wind it up!

[@dennymoore4219]

My first car was a 66 Impala, 283 Powerglide. Love to have that one back

[@ericborgen7311]

I seen an article with a crystler 440 and the guy who rebuilt it said that he first tested it with hydraulic lifters and then he used solid lifters and with the solid lifters the same engine gained 40 Horses

[@arnoldschmidt2753]

EVERYTHING starts with an idea .Then a clean sheet of paper. Then the pens are laying down the ideas .Hen the foundry sand moulds are made Then the castings are poured. Then they are cured .Then they are machined, fitted with crankshafts, pistons & Rod assemblies, camshafts ,heads,pushrods,Oil pump and intakes carbs,and fineally oil pan ,valve covers,timing chain cover ,harmonic balancer and pulleys belts,air cleaner . AND VOLLÀ .One sweet running little engine .

[@Luigi-pk8mk]

The very fine 327 small block from its small block family: 265, 283, 327, 350, 400. We also had 302 (Z/28) and 305 (garden variety). Now you can get a 377 from Mercruiser! The small block lives on!

[@basilcarroll9729]

Don't forget the 307.

[@Luigi-pk8mk]

@@basilcarroll9729 You’re right there was the 307 & 305 small blocks which were standard on many Chevrolets, the 307 I think replaced the 283 and the 305 came along later like when the full size and mid sized cars were down sized in 1977/1978.

[@basilcarroll9729]

@@Luigi-pk8mk Yes, 1976 for 305 and 1979 for the 267.

[@musclecarmitch908]

I'm a mopar guy too, but I also have a Corvette. I like everything!

[@GJ-DT]

that Impala is really RED! center dump manifolds with 2.5 inch flange probably a little better.

[@MikeJBlues]

Nothing wrong with a small block chevy , great Monday Nick 👍

[@billfeld5883]

They did have a road draft tube in the back of the intake manifold in the early years of the small block Chevy's!!! 2022

[@SeymourBalz]

Seeing that engines nearly stock, I believe you would have had better header numbers with 1-5/8" tubes. Another simple trick is to add 1.6 rockers on the exhaust. There are stock type stamped steel ones available. Also there were multiple 327's available. Up to 365 horse with a carb. The various 327's used Rochester 4GC's Quadrajets, AFBS, or an 1850 style Holley. As HP went up, so did the size of the carb.

[@BuzzLOLOL]

Also, a smaller cam would give a torque 'curve' instead of a torque 'peak'!

[@texasredneck9226]

You must be an old ChevyNut! I'm with you, so I am as well.

[@stevepick9527]

That mouse motor has a nice rumble to it at idle! Always liked the power and rpm’s the 327 could put out. 👍

[@duanepierson4375]

100%! I had a 68 Vette w/ nice 327/350 horse. It would be nice to see a dyno comparison between log style and the rams horn style.

[@leroyll1144]

You mean the mouse that roared!;

[@leroyll1144]

Rams horn they say had a 32oercent larger opening and a smoother arched flow to produce higher Cfms

[@richardcheese4722]

327 has a real nice bore/stroke ratio. They run ridiculously well for their dimensions.

[@leroyll1144]

Especially w a11:25;1 compression popup pistons

[@rixkafer56]

Thanks Nick and George ! Ive had a 327 .030 over for years and i love it !! solid isky and 202 camel hump heads, 600 holley.... had headers but i swapped back to manifolds several years ago ... i knew it slowed a bit down but its still a fun ride in my 64 malibu.... thanks for the dyno numbers as i thought mine was always in the low 300 hp range ... happy greek easter too

[@danmyers9372]

Opa!!

[@lessharratt8719]

Cool.

[@sachenstein]

Yip, i love my little steel crank 68 327, last ran 20 years ago, being built to an old school recipe, using a NOS moon circuit cam, offy ram, 650dp spreadbore, 462s, and powerglide. Heads, crank etc are the engines originals.

[@rixkafer56]

just a thought... do you have the rear crank case vent blocked ? Its jsst a hose to the ground then in 67 they routed it to the air cleaner ... thanks again👍

[@LuckyBaldwin777]

Seems like that engine should have a road draft tube. If that port is plugged, blowby would build pressure in the crankcase and pop the breather cap off like it does.

[@fastbuzzardo4204]

Only because I currently own a 1967 327 sbc that I got from a 1967 impala SS that has the small journal forged crankshaft which was the last year of the small journal I speculate that the 327 in this video is a post 1967 large journal which the block was different than the early years . This engine block does not have the casting hole beside the distributor for the lifter valley vent/baffle . Also this engine in the video has a larger harmonic balancer and Bolt . Pre 1968 small journals had a very small thin balancer because the engines were internally balanced . And also this engine has the spin on type oil filter and not the early canister .

[@meowerstationone3793]

Had a '63 Impala convertible with a 327. Loved that car. Great video. Enjoyed the music choices!

[@davidtolson4804]

Great show Nick that 327 screams.A friend had 327 in 67 chevelle with 4.88 in the rear that thing was a monster.

[@jcos55chev19]

I agree with using the larger Corvette Rams horn manifolds. If I remember correctly back on the full sized chevys from 1957 thru 1966, they used small rams horn manifolds. Also the early small blocks used a "road draft tube on the rear of the engine block (next to the distributor) so that crankcase air could enter thru the oil cap and exhaust thru that road draft tube. Without that tube, crankcase air has to go in and out of the same oil cap. In that case you probably need a PVC hook up.

[@raynicolaas7679]

PVC robs horsepower and builds carbon on intake valves over time. Now your fuel milage just went out the door. Run that crap out the road draft tube and breather caps. I wish Nick would show us on the "Dynomometer" just how many horsepower those PVC valves rob from us.

[@fastbuzzardo4204]

@@raynicolaas7679 Positive crankcase ventilation Valve (PCV) Valve is a good improvement . It keeps the engine block well vented with a slight vacum from the intake or carb .Before the PCV valve the sbc were oil users and leakers . With the correct baffles just before the PCV valve the oil mist will condensate and drip as a fluid back into the engine oil .i believe it also helped to keep oil vapor in the engine and helped with emissions regulations that came into effect in the late 1960's.

[@chriscatarcio2983]

The 66 blocks should have a hole behind the spark sorter for the p.v.c. valve at least. A nippel for a hose. It was steel and not part of the block . Then it had a baffle inside of the lifter valley. That's why the valve covers had no holes . My 58 283 had a draft tube. Two and a half rans horne manifolds would be nice. Check speed way.

[@SeymourBalz]

...Road Draft Tube

[@chriscatarcio2983]

@@SeymourBalz right tom. Stinky. Fumes. It was wore out.

[@erneststorch9844]

I had a 70 Camaro I bought new and in less than a week the valve covers were leaking. I changed the valve cover screws and they were no more than finger tight. I tighten them up but only slowed it down. My experience is when corke gaskets start leaking there is no stopping it . I replaced them with neosporin gaskets and worked perfectly.

[@patturk7408]

Your numbers were right on the money. 331ci, double hump heads, 232 degree cam, 650 Holley....335hp with headers is right in the ballpark.

[@BuzzLOLOL]

Except cam is about 2 sizes too big for that engine... horrible torque 'curve'... see 18:45...

[@jimk4530]

@@BuzzLOLOL I agree with BuzzLOLOL...a 218@050 454 lift (Comp 268H) cam would have produced a flatter torque curve...important in a big heavy Impala.

[@BuzzLOLOL]

@@jimk4530 - Yeah, something with 210-219 intake duration would make for much more enjoyable cruising... with little loss of peak HP...

[@OlSgtLove]

Hello Nick and George!!! Very cool to see the Chevy Impala getting a new lease on life . Very good to have a wiring man who knows his stuff . That's a beautiful 327 engine , beautiful color and paint job on it . Be nice if they stay that way ...lolololol. Love hanging out at Nick's Garage ..

[@NicksGarage]

Thanks 👍

[@donscott6431]

Chevies were great because of interchangeability of engine parts. 327’s came with either large or small diameter crankshafts which opened up even more possibilities of crank-throw/ bore configurations, depending on which c.i. block and rods you used. I always used “pink” rods for large diameter, “green” for small diameter. You could stroke/destroke an engine by using a large diameter crank, and then off-set grinding the rod throws .090 (the rod throw diameter difference is .0100, with the additional .010 for cleanup). You would use the “green” rods in this instance.

[@darrellsomers5427]

All small journal Chevy cranks are forged

[@harveynewman4333]

the 250hp,327 had power pack heads. that 327on the dyno has 194,camel hump heads. it was 275 hp,with the Q-jet carb.

[@jeffrobodine1850]

I had a 63 Vette 327 with a small cam and it ran 375 bph it was quick 💯💯

[@pockets5628]

Needs to be a draft tube at the back of the intake when using that factory style breather/fill tube. Impala SS would have had rams horns manifolds. Why not get those with a 2 1/2” outlet version, would be a lot better. 40ft lbs torque to give up is a huge amount, especially for in a big car.

[@79tazman]

I would like to see a test between the rams horns and the ones on the engine I know the old timers loved the Ram horns better plus they were used on the Corvettes and that of the 60's it would be cool to see what one is better.

[@dongeorge4037]

There's another way to go without destroying the valve covers with a PCV opening. I pulled the draft tube at the back and put my PCV there. Same vapor flow as with a PCV.

[@byronhegstad6931]

If I remember correctly they used a necked down fitting in the draft tube hole and the pvc hooked into that

[@themackguyverchannel7713]

Of course it depends on the compression ratio. The 11:1 version was 1965 - 1968 with 4 Barrel Carb (L79) Max Brake Horsepower: 350 @ 5800 rpm Max Torque: 360 @ 3600 rpm Stroke: 3.25 Bore: 4.001 Compression: 11.0 Firing Order: 18436572

[@NicksGarage]

Thanks for the numbers.

[@bobthbldr3]

@@NicksGarage That's the L79 he is talking about. 350 hp with hydraulic lifters! Came in Corvettes and Chevy II's. They embarassed a lot of big block cars.

[@DANTHETUBEMAN]

@@bobthbldr3 yep that's the 151 cam

[@BuzzLOLOL]

@@bobthbldr3 - Was also top motor for Chevelle before 396 came along late '65 and after...

[@BuzzLOLOL]

11:1 also in earlier 360, 365, and 375 HP 327" engines...

[@kennethjosephson134]

Living in Southern Nevada, road salt induced rust is not an issue. But intense heat and UV kills soft parts. I completely rewired my ‘66 C-10, my ‘59 Plymouth wagon and had the harnesses rebuilt for my ‘69 Fury convertible as there are no reproduction harnesses for most C bodies. The brittle insulation was definitely a short and fire hazard. Even garage kept vintage vehicles receive intense sunlight if driven nearly daily in this climate. But after growing up in Wisconsin, replacing wiring, upholstery and weatherstripping is the lesser evil when compared to replacing rotted steel.

[@darthgrundle2349]

This man knows what he's doing. Once an engine is up temperature, retighten the header bolts too compensate for expansion, will save you fixing leaks later on!!!

[@daxtonbrown]

The 66 327 originally had an oil can inside the engine for venting but most people seal that off. You could probably pcv to that hole.

[@fastbuzzardo4204]

Lifter valley baffle made of stainless steel.

[@Stonehombre1]

I had a 66 Impala SS with a 327 and next to my 69 Charger it was one of the best cars I ever owned .... SWEET body style !!!! You can tell some things were changed as those are Chevy SCRIPT 283 valve covers. 66 327 had some breathers coming out the valve covers .. Sure do miss that car and engine. P.S. You said you were going to make provisions in the valve covers for a breather, I WOULD NOT DO THAT !!! THOSE ARE COLLECTABLE TO CHEVY GUYS !!! Get the CORRECT 327 valve covers and you'll be OK.

[@NicksGarage]

Nice taste.

[@Stonehombre1]

@@NicksGarage Please check my additions to my comment. Thanks

[@kavinskysmith4094]

you know when it comes to convertibles the one I've always had a thing for is the 71' when it came to the cuda, its like the 63 split window of the cuda line, a one year option, well look, that was also the last year of the convertible itself and the 426 in the line as well, it was alot of the last of the last and I think what really did it for me was the nash bridges tv show they had with the cuda with the small block on there, a 360 performance crate as they blew the 340 in the hero car like the sound that car made, plus it was kind of a custom color a sherman williams safety yellow of all things that was like a cross between Lemon Twist and Butterscotch, mixed in with a white interior, like it just really worked for that thing. also that 67 yeah those fuses, I recognize those, those are housing fuses of the period that they used in the 70's, its probably a very good call that he switches them out as those straight up look like tv tubes lol and also with that 67 that puts it right before they started switching over to the 350, as the corvette C3 only had the 327 for one year, 1968, and probably the same here with the impala and its amazing how much bigger that car got, as my father had a 61 convertible, black with red interior with a 283 with the turboglide turbine transmission, 3 blades, smoothest car he ever had, and fast, deceivingly so, as the guy he sold it to got 5 speeding tickets in the first month, and here that is with what I think is the same engine enlarged to 327 cubic inches with a much wider body on it. like that thing should be quick and then some, like you'd think you'd need a big block but that motor, they used that in everything, including a bunch of italian cars, a famous Bizzarini car made by the guy who made V12's for lambo made his car using that engine called the 5300 same thing with the Iso grifo, and if the italians love it, you know its gotta be fast, or atleast sporty, like the 68 Vette that had the 327 revs up to the upper 6K's, like its a proper sports car motor granted I think with the italian setup they put on either double or triple carbs, but the lambo test driver, the guy who tested 550 horsepower countaches and all that crazyness, he considers the bizzarini GT car with that motor his favorite, and dont forget corvette C2 grand sport, 327 enlarged to 377 cubic inches and it puts out 425 horsepower on race gas also those figures, the saying goes take 25% off to get the actual to the wheel power, so 300 ish hp, 25%, 75 HP, 225 to the wheels, and that is with a single carb, and 247 with the good exhaust like that's not to far from what that souped up 76 ghost camaro Helge Meyer had with nitro from stock for humanitarian runs lol like nevermind that stupid 305 they put in everything in the 80's, they should have just brought this back lol

[@twgarage-terrywatson1672]

Great job as always. Would be interesting to see the difference between the log style manifolds verses the ram horn style. Maybe that could be the next SBC dyno test?

[@pappy017]

Evenin Mr Nick!! Have a Great week!! U too George!! Just watched a replay of Friday's stream, awesome!!

[@NicksGarage]

Thanks! You too! Glad to have you with us.

[@jurisklavins2578]

DJ Nick at the console - (Dyno Jockey) - vroom! 😎

[@johnvrbka570]

Earlier engines had a breather tube on the back of the engine then in like 63 they put a pcv in the carb with a hose to a small manifold there the earlier breather tubes were. You should add a pcv. It not only keeps the engine cleaner but less back pressure, less leaks.

[@jeffjankiewicz5100]

George has a beautiful Impala, soon to have a nice cruiser engine too. Well done Nick. Stay safe guys, God Bless.

[@NicksGarage]

Thanks 👍

[@BuzzLOLOL]

Cam looks too big and peaky for a 'cruiser'...