1969 Chevy 427 Dyno Test

Dyno test and painting of an all original 1969 Chevy 427
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[@ralphvalkenhoff2887]

What a beautiful motor! The sound. The torque, the horse power, truly a magnificent display of engineering.

[@PetesGarage]

They definitely get the heart pumping.

[@sbcbuilder4279]

These big block chevy engines were extremely reliable right out of the factory. Just put a better distributor, free flow air cleaner and headers and you had a real good street engine. The oval port heads were better all around for everyday driving. I had two 69 Camaro's, one was a SS 396 375 HP - L78, 4 speed with 4:56 rear gear, the other was a RS Z28 with DZ 302/290 HP and 3:31 rear gear. Both cars had the same wheels and plate number (you would never get away with that today!). I would use the big block for street racing and the small block for road racing. Nobody ever caught on and it was lots of fun. The good old days of cheap beer and cheap high octane gas right out of the pump. The high octane pump gas is long gone but not the memories.

[@PetesGarage]

Now that is an awesome comment! Thank you

[@jlo13800]

They can run oil injection with a VRO pump and dry sump!

[@paulrollins604]

High octane gas is all over the place go get some.

[@THEAVERAGEGAMER13]

SBC Builder great story thanks for sharing it with us!

[@wackomanx]

There was a Sunoco about 45 minutes from my house that sold 100 octane at the pump. Last time I stopped by that gas station was probably 2008. They had all the normal pumps in front of the store and then that single pump in the back of the lot. Now we have E85 which ranges from 51%-83%.

[@blackwaterdogs4256]

Those 427 engines made power and torque ALL OVER the place ! :-)

[@DeanMk1]

Everything else being equal, 427 = 396 with a little more mid-range punch. Good engines, all of them.

[@GyroPyro121212]

DeanMk1 Maybe so, but I’d take a 427 over any of them except maybe an LS6 454 or a DZ302.

[@jamescates1606]

GyroPyro12 Or an LS7 I bought one new in the Crate for $ 1,810.00 back in 79. Still have it.

[@blackwaterdogs4256]

@@jamescates1606 Those were the days ! Back in `67, I bought an in-the-crate L78 from Motion Performance (Baldwin Chevrolet, Long Island NY) for around $800. That was a bad mofo , with a Super T-10 and 12-bolt 4.56 Posi, it made my `55 Sedan Delivery a serious competitor....

[@rtkl13]

@@jamescates1606 lucky you

[@billwalter9917]

As a lifelong mopar guy - much respect for the late, great Chevy 427.

[@PetesGarage]

I agree Bill

[@boostjunkie2320]

I'm a GM guy but much respect to the 426 hemi and the 440

[@rotorr22]

Say what you will, but I would have taken 509 HP under the hood of anything in 1969!

[@PetesGarage]

I know right? You be king of the hill back then

[@dentman67]

All these engines were way underrated at the time from the factory for insurance purposes. The results of these dyno pulls make perfect sense.

[@PetesGarage]

Yeah.....they could do much more back then which made them fun to work on

[@charlieb308]

Jack Petracci I don’t think so! I know a guy who bought a 1970 Chevrolet SS LS6 454 and engine was 280hp at wheels on dyno if you factor in the 15% loss through driveline that is not even 450hp. No way it was near 500hp. Was this 427 rebuilt to factory specs for say a Yenko Camaro? Or better parts than factory specs?

[@OldGriz708]

Chevy still underrates their numbers today.

[@steeljohnson539]

Yes they were. Anyone who studies the history of the first gen camaro's knows this. General Motors was underrating these cars before Nickey Chevrolet, Don Yenko, and Fred Gibb were making orders to the Factory. These guys were pulling motors out of the 69 Corvettes and souping them up even more before they dropped them in the Camaro's. A granddaughter of Nickey Chevrolet told us that they were putting 600 and 700 hp motors in cars back then!

[@yavin99]

I know manufactures back then said the power was brake hp but I would say wheel hp is more accurate.

[@potaka79]

And he does it again, well done Pete your a magician.

[@PetesGarage]

Thank you.....I don't feel very magical....lol

[@jlo13800]

I would run a roller bearing crank if i rebuilt one.

[@duncancox7341]

my first car was a '66 with a 396. I have also owned a 454, but never a 427. Maybe someday. Beautiful sounding and looking engine in the video. Thanks for posting it

[@PetesGarage]

Thanks my friend

[@OldGriz708]

The new 427 COPO Camaros are great as well !!

[@mikegriffith8266]

Glad to hear it run, thanks for not over revving it.

[@PetesGarage]

Thanks my fiend

[@pierredufresne3377]

I own a 427 and it's an awesome engine. Nothing like the big block performance and sound.😁👍

[@PetesGarage]

Couldn't agree more!

[@stevedeleon8775]

My high school car (1977) was a 1970 1/2 Heavy Chevy Chevelle SS 454..What a BEAST!

[@PetesGarage]

That's a monster

[@stevedeleon8775]

CHEVY🇺🇸 POWER! Thank God I grew up during this Glorious Era Of TRUE Muscle Cars!👍

[@PetesGarage]

You're a lucky guy!

[@stevedeleon8775]

@@PetesGaragemy first Car was my dads 1958 Bel Aire ..back in 1974...

[@josephracz7459]

Great job! Very professional and just fla out awesome! Keep up the great work please. Joe

[@PetesGarage]

Thanks Joe!

[@MrFireman164]

Very Nice sir

[@daveforsythe9021]

Very impressive. Gonna be a sweet ride. Subscribed

[@PetesGarage]

Thanks for the sub!

[@tickdog3]

holy cow.. that's a work of art!

[@PetesGarage]

Wait until you see the car

[@canusakommando9692]

Pete I came back across your post again and boy does it make me smile! And who is the guy that was bitching about your HP numbers? Ban that guy!!!! He is no Chevy lover. If he was he would just shut up and enjoy your master piece! Only a Master could pull down your numbers with very few tweaks and a massage. Thanks Pete I hope you enjoy your ride as much as we do.

[@PetesGarage]

That's awesome Gary. I like your suggestion, but I only only ban people who use profanity over and over or insult other people's comments. I respect everyone's opinions even if I disagree. Let's all enjoy the ride. That engine is going in the '69 Camaro right now. Hopefully it will be on the road this summer, I'll be sure to get some video.

[@canusakommando9692]

Petes Garage Sorry Pete I was joking around. I was poking a little fun at non Chevy guys. I have a ton of friends who are Mopar guys. I hope you enjoy your awesome piece of history Pete. Where abouts where are you at? And man do I love my Chevys ! Stay safe Pete. Got to go I'm off to Home Depot one of my most favourite places on the planet.

[@PetesGarage]

Ok...got ya....sometimes it's tough to tell....thanks my friend

[@milehighkit4725]

That's awesome! Just earned a new subscriber!

[@PetesGarage]

Thanks Hugh

[@thomashuteson569]

Nice build and video. Those big blocks sure put out alot of hp.

[@PetesGarage]

They are awesome for sure

[@scottwest1813]

Nice job!

[@starman6280]

Man am I jealous!!! My Pop and I built my 69 elCamino back in the 80's. I looked for over 2 years for a 427 that wasn't ridiculously priced. I wanted the 427 for the fast rev you get from that shorter stroke than a 454. I didn't want a 396 so I was looking for the 427. After searching for so long I settled for a 454. That was the last engine my Pop ever built. We didn't have access to a dyno so i have no numbers. Let's just say it was stout. I miss that car more than any I've ever owned. Data: 1969 elCamino, 454 with a Holly 650 vacuum secondary riding on the stock intake, Hedman Headers, Factory SS gauges, bucket seats, Hurst Competition Plus shifter, Muncie M22 Rock Crusher, Appliance mags shod with BFG TA Radial tires, 3:31 posi rear, and 1200 watts of Alpine stereo. It was "arrest me red" and had the correct black SS stripes. It didn't matter how I drove this thing, it got a reliable 9 MPG. Never less, never more. God I miss those days!!!

[@PetesGarage]

That's pretty awesome, still love the 454's

[@MrHeadshot1982]

sounds great keep up the good work.

[@PetesGarage]

Thanks my friend

[@GospelTenor4Christ]

The 427 chevy was grossly underrated. My uncles friend purchased a new 1966 Impala SS 427 4 speed, my uncle swore it was 600 hp, nothing factory could take it back in the day.

[@PetesGarage]

Interesting, but I don't think 600 from the factory.

[@joekurtz8303]

My buddy's parents had a 4door Caprice with this. Power plenty & on the highway, smooth acceleration. The good Doctor used this for his daily driver across the county and had good maintenance.

[@PetesGarage]

That's awesome, thanks Joe

[@regsparkes6507]

That engine, now that you have it painted, is almost as good looking as the car it belong's to. I've never driven a 427 engine'd car, but I did drive my buddy's 1967 Chevelle 396 SS, that was impressive I remember . So, I can imagine this 427 would be a powerful beast too.

[@PetesGarage]

Yeah, this one will be a little crazy

[@patfromamboy]

I have a 427 in my 66 Chevelle that was my daily driver for several years. It was great and still runs well 40 years later. It was built in 83. They are amazing engines. It revved to 8000 rpm’s a couple of times but normally had a 7000 rpm redline. We used heavy duty parts like triple valve springs.

[@jimnoneother6317]

Man once your done with the car, bring it around Marks. I'd love to see it. And a beautiful color Pete.

[@canusakommando9692]

It's my favorite from when I was a kid. I love the straight low rise all Chrome. Had to be chrome. Trick . Plain. Always come in as if you have no plan. Sleeper. Always come in sleeper form. Don't telegraph . Higgy always liked having a couple of oil leaks. I miss those days.

[@PetesGarage]

I miss those days too

[@joewilley7776]

Such a great engine

[@PetesGarage]

I agree

[@alisoncrehore8923]

WOW, lucky you! and cool shirt too

[@PetesGarage]

Thanks my friend

[@chivoberrinches400]

i entered the comment section to say the same! chevys and pink floyd are a match made in heaven.

[@kierantodd1597]

This is great,my car has a 1000cc turbo thanks UK insurance

[@marcuslimbaugh4592]

i love that eng.. i need 2 of them

[@PetesGarage]

Ok....let's right up a work order

[@natew8882]

@@PetesGarage Dont know if I'd have much confidence in a guy who doesn't know the difference between right and write, or the difference between ft. lbs. and lb. ft.

[@jrry1473]

The number that really matters is that great torque at only 3600 rpm. Awesome engine.

[@PetesGarage]

Thanks my friend

[@jlo13800]

they are convertable to a loop scavenged 2 stroke through the valves, but these motor lack the metallurgy of todays sled motors and have nowhere near the power for there size of a modern sled engine rotax engine.

[@rextruegood6168]

Bruce Miller why the 2 stroke obsession?

[@glenholmgren1218]

@@jlo13800 ??? ... what ?

[@Shamilt3]

Out of all the chevy BB's, the 427, was/is something special. If you think about it, there's something in the math. Ford, Chrysler, and Chevy's best BB's were all in that same CU" 426, 427,428,429

[@PetesGarage]

I agree

[@deansapp4635]

Nice numbers, as a Ford guy, That engine is very impressive

[@PetesGarage]

Thank you

[@mickthomassen2887]

Hi from Australia. Thx for the great segments Pete. Just subscribed. Appreciate the explanations, camera work and attention to detail you provided in the 289 rebuild. I'm skipping through the segments posted to see if you have done the same with SBC?? Recently acquired a numbers matching L48 69 Nova SS and am hoping to have something like the 289 vid to refer to. Keep up the great work.

[@PetesGarage]

Hi Mick. I did not do that for the Chevy, but if you follow the same building practices you will be successful. i have a couple more builds coming up that may help you.

[@Cradletothegrave67]

Nice !! We run a 68 L88 in a 67 malibu. nostalgia Drag car. I love my vintage power plant. The only thing not period correct in the engine is the valve springs and the chrome moly retainers. Runs like a champ.

[@PetesGarage]

Right on!

[@dank3998]

Big blocks rule, love the sound.

[@PetesGarage]

Nothing better

[@ziggassedup]

That's not too shabby.

[@botomblin323]

Good numbers

[@sknemo]

Had a 1967 SS427 convertible with 4:11 gears back in 1972, it was an Impala body but no Impala badges on it, Just SS and 427 all over the body. Top speed was only about 110 mph at 6000 rpm but it was a brutal street racer. The car came with an M21 but I replaced it with an M22. The car had the special hood that set it apart from the other Impalas. Disc brakes and 15" rally wheels from the factory too.

[@PetesGarage]

Sounds like an awesome car

[@ThatDanDude]

Nice build Pete. Chevy 427 was the dream engine when I was growing up in the late 70's early 80's Job well done. That is a lot of horses for a " mostly stock " engine. :-)

[@PetesGarage]

Back then engines were not built as tight. With some machine work and balancing you can squeeze a lot out of the engines

[@PetesGarage]

Too bad it was not popular to dyno an engine back then to see how well it performed

[@terrypetty9822]

Agreed then we could know what a stock 69 L72 427 could really do.

[@twagoner2]

I’ve owned more then 200 cars, I had a 1967 Chevelle with 427 and 4 speed that was in my top 10 cars, the 427 was incredible!

[@PetesGarage]

That's awesome!

[@gerrywagoner26]

Agreed, on the 427. I've owned two of them.

[@carlosgavino6874]

really beutiful engine over 500 on hp and torque pretty impressive

[@PetesGarage]

It came out great

[@chief3378]

Like those work horse from the day. P. S. Love the shirt

[@PetesGarage]

Thanks!!

[@channellock_garage]

I think the 427 was the best engine combination ever made!!!

[@PetesGarage]

Could be

[@billwalter9917]

It's right up there, that's for sure.

[@lelandlewis7207]

Notice on the dyno sheet that engine torque, which is "work torque", is in lb-ft, not ft-lbs, which is "twisting torque", like for a bolt.

[@quantumss]

They can call torque whatever they want but its still ft lbs. Next thing they might try is power-horse. Can't fix stupid.

[@robbygee2539]

You are a motor head. Subscribed.

[@PetesGarage]

Thanks Robby! Welcome

[@karlsracing8422]

These and the 426 Hemi were sand bagging Hp numbers back then.

[@PetesGarage]

That's the rumor

[@mikebrown5648]

😭😭 I miss these engines

[@PetesGarage]

Me too

[@69newportking]

Those numbers are great street car numbers

[@PetesGarage]

It's great on the street

[@adamanderson5055]

I currently own a 454HO. It is rated at 438 hp. I believe that is very close to correct. To give you an idea how much they under rated the ZL1 engine...My engine has a roller cam with a fairly smooth idle.(not very lopey). And my compression ratio is only 8 3/4 to 1. That ZL1 runs 12 to 1 compression. That is a massive difference.

[@johnbecay6887]

pretty good numbers for that motor

[@PetesGarage]

The customer was real happy

[@joeboden8898]

409 and 427 327 are my favorites" Ps and 265 283"

[@PetesGarage]

They're all pretty good

[@ronnieboucherthecrystalcraftsm]

5200 rpm seems to be a perfect sweet spot - almost balanced hp - torque ! nice job no need for 6500 rpm . thank you.

[@davidmarshall8628]

There's a reason for that.😁

[@PetesGarage]

Thanks Ronnie

[@bunning63]

519 'Torques' that's pretty good for a stock engine. Nice job.

[@PetesGarage]

Thank you my friend

[@hotrodray6802]

Not stock. Dyno run no wp and b8g headers is not stock.

[@livewire2759]

@@PetesGarage It isn't totally stock though, is it? ;) Even the 435 hp corvette cam won't get you over 500hp.

[@livewire2759]

@@hotrodray6802 That's actually how they dynoed them back then. Remember, they measured GROSS hp and torque up until 71 when they started testing NET. Gross is measured with headers and no accessories, net is with accessories and manifolds. This engine would have been rated at either 390 or 425 hp in '69, gross, which would have been about 325 to 350 net.

[@SSGTA440]

Nice work, sounds great..couple of questions, tho...what cam did you run? ....did those dyno #'s come in using headers?....if so, using those manifolds may diminish the horsepower ratings, about 10%

[@PetesGarage]

I'd have to look up the cam on that one, It was a couple over factory. It was tested with headers to tune, but will be using stock looking manifolds in the car.

[@noneyabussiness634]

Nice motor I have it's big brother 454 ls7

[@PetesGarage]

Awesome!

[@PunisherDMT]

Not being a smart ass, but I’d really like to see the dyno number with those iron manifolds on it; very curious to know the difference from those ultra long primary headers?

[@MagaRickn]

Would be interested in the make of that "replica" aluminum intake manifold. I have a 69 Corvette 427 that is pretty much all original. Going back in my 56 Chevy this spring.

[@PetesGarage]

I'll have to look it up

[@grabir01]

Big Blocks rule !!!

[@PetesGarage]

They sure do

[@glennplumbe7815]

Hey Peter will the power output alter much with stock exhaust manifolds as you had headers on Dyno thank you .By the way sounded awesome during the pull .

[@PetesGarage]

Headers will add 40 to 50 HP. Thanks Glenn

[@WizzRacing]

Someone knows his math. As not many people can get those results from an factory produced engine. Unless they have an en-depth understanding of cam profiles and crankshaft designs. Wish I had that knowledge 40 years ago. I would have looked like a genius on a budget. Great Stuff!

[@PetesGarage]

Claude Rains I wish I had it too....lol

[@jefflee1189]

I used to work at mosler aero-automotive bout a decade ago before I worked at Ferrari.but anyway long story short warren mosler held a auction and we were getting stuff together and we found a brodix motor and a genuine MARK 4, 427 RAT engine. it was in a old crate. the crate looked to be 30 or 40 years old. I really couldn't believe my eyes. the brodix looked like it had to be 500ci

[@PetesGarage]

Wow....that is a really cool story!

[@bugbomb8048]

Hey Pete I did a 427 up back when I had no idea what I was really doing...up to this point I guess I just got lucky....I bought and had machined everything to do a 430 hp 427. The machine shop didn’t mill the heads enough for the valve springs to set lower for the higher lift cam....wiped the cam in minutes sent crap everywhere in the engine. Started over checked everything out better during the build this time and it ran great for a day....and would not start the next morning ... tore it back down and the distributor gear was eaten off and the cam gear in bad shape...I was broke and to this day still wondering why? Put the 402 BB back in and never looked back

[@PetesGarage]

That is a huge bummer! If you don't set the distributor end play it will chew up the gear. If it's too tight the pin will shear and it's all over from there. That would have been a great engine for you.

[@Imnotyourdoormat]

how high a lift bumpstick is it?....er..uhmm...WAS it?

[@bugbomb8048]

charlotte quillen ...can’t remember but the springs lengths needed more depth and the machine shop didn’t go far enough and I didn’t check it and basically done a bad assembly work and paid the price for going too radical for my knowledge at that time

[@NewtonWashinton]

Good numbers on your 427

[@PetesGarage]

Thanks

[@themouseonthebike]

The dyno run had headers and the engine was shown with a cast iron exhaust manifold. That will change the numbers of hp and torque.

[@PetesGarage]

That is true.

[@starbattles1]

THANK YOU, look how many clueless people didn't notice that. lol. Glad I found at least one who said something. I said a little more lol

[@dstrong11]

It gave that engine at least 35 to 40 hp!

[@traceanthony3588]

ronald brignoni i was pissed because i like the look of the old cast headers

[@traceanthony3588]

ronald brignoni they always use stupid tubular "hot rod" headers

[@blackbirdxx928]

509 @5800 Damn GM sure underrated that one! I bought a hondo pickle fork hydro that had a 427 dart/domi and a .610 x255 cam. It ran kinda ok until the blocked cracked. I took it all apart, it had std l88 pistons, dimple rods and the right rect port closed chamber heads.Replaced the block, put in a .700 x275 roller, flycut the pistons and swapped the single carb for 660s and a t/r, After some carb mods the thing hauled ass. If a stocker made 509 mine had to be 600+. kzbin.info/www/bejne/o5uVdmahfNuipM0 After that i swapped the 40 gears for 22s and picked up 11 mph best of 119 mph gps @7300 rpm..i used to run upriver at 6500 rmp 10 min at a time..Ran the motor 150+ hrs and never had a problem. As far as i am concerned the 427 makes more hp per dollar than any other motor made and with proper assembly they dont break

[@PetesGarage]

Sounds pretty solid!

[@SonnyL47]

I had in High School, I didn't build it, but, a 1966 Chevy Impala SS that had a 427/ 435hp stock from the factory, that someone had built, 20 over, full cam, high rise with a Holly 1050 3 barrel, again, I was in high school.

[@PetesGarage]

That sounds awesome!

[@genemauguin2274]

My '68Z-28 had Traco DZ302. Absolutely no trouble handling big blocks. 4.10 gears ran me up to 140 @ 8000rpm.

[@PetesGarage]

Nice

[@johnverrocchi4296]

The 302 motors breathed as well as the 427's.

[@chevy427ify]

Sweet 427,,,

[@PetesGarage]

The car is almost done

[@edzalewski2272]

It is almost stock... Dyno tests obviously had large tube headers (watch video). On a big engine with a lot of cylinder head that would likely add 40-60 HP. Real HP with factory exhaust manifolds is probably more like 450 HP. Nothing to sneeze at for sure, but a lot of builders run "Stock" engines with Headers to post impressive numbers.

[@williamthunder1414]

I have a 427 stock from. Back in the 69 . Hopefully it's as good .

[@PetesGarage]

No reason it won't be

[@ryanstarks5236]

427 bbc and a pink floyd t shirt. Right on brother!

[@PetesGarage]

Rock on!

[@wallyceiphert4599]

With the peaks of the torque & hp spaced that far apart in the rpm's, wouldn't a wide gear spaced tranny accommodate this engine better or equal to a close ratio set up ? Impressive !

[@PetesGarage]

It's getting a Tremec TKO 600 with 3:96 gears. You have a great point.

[@hillarylevenworth8824]

I'm trying to remember the 1969 Chevrolet 427 application that used that "original" electric choke Holley?

[@PetesGarage]

That is a great question, hopefully someone will comment

[@DeanMk1]

A 402 with a 454/502 crank is also 427 cu.in. and they made some 402 with a tall deck. I wonder how the dyno numbers would compare to an actual "factory" 427. Peak's would likely be the same, but I'm wondering about the shape of the curve on the graph as you take the engine from low rpm up through high rpm.

[@PetesGarage]

+DeanMk1 There were many combinations. The customer was very specific and bought parts himself, so it is what it is

[@DeanMk1]

Sorry Pete, I wasn't referring to the engine shown here, I was just musing generally. You guys did a great job on that motor. Thanks for showing it to us.

[@PetesGarage]

+DeanMk1 Ah ok....thanks for clarifying

[@bw6538]

Had friends that had 396 and 454 chevells one had a 350 hp camro never seen 427 except in a 69 corvette is really to bad GM didn’t make more 427 very impressive numbers thanks

[@PetesGarage]

It's too bad lots of those engines were made more of

[@mattbauckman9907]

The best thing to improve stock engines from this era is to convert the old points distributor to HEI. Points were very inconsistent, couldn’t handle the rpms and you weren’t getting a full 12 volts. This combined with an advance recurve and dialing in the jetting ( on a stock production engine) could potentially give you another 30-40 hp. You only have to sneeze on a big block to get power out of it. It cracks me up that the 70s and 80’s even 90s big blocks were so weak. You have to go out of your way to NOT get horse power on one of these engines.

[@PetesGarage]

I agree

[@Doosterify]

Those are really good power numbers. Can you tell us a little more about it? What heads, oval or rectangle port? , open or closed chamber? What camshaft? Compression ratio?

[@PetesGarage]

I'll dig up the info

[@jb3536]

I'm guessing it had 11:1 and square ports to put out that kind of hp. I had a 427/ 425hp (vastly underrated from the factory)with 11:1 and sq.ports and a 427/430hp (L88) with 12.5's and was said to be about 550hp.

[@gst69man]

pete, great vids I watch all of them. Question, I have a 289 SBF sitting in a car several years in a garage. Completely rebuilt as an hipo. We never painted the block. Seems like a slight surface layer of rust. How might I paint this engine without pulling it from the car ( 1977 datsun 280z). Do I need to use some rust remover? Can you recommend a process?

[@PetesGarage]

Eastwood's rust converter works awesome. Then you can use their 2k engine paint with a brush.

[@olderthanyoucali8512]

In 1969 I bought a Z-28. Was unhappy with the lack of torque. Could have run 4:11 - 4:88. Instead I obtained a almost new 427 cu.in. 435 h.p. engine out of a Corvette. Probably one of my favorite cars. Although I've owned most of the muscle cars from the sixties. Till they killed all the performance for the "Smog God "!

[@biscaynenick]

Pete, Are these the early style closed chamber 11.0:1 pistons ???

[@PetesGarage]

biscaynenick 11:1 machined to get compression down to 10

[@danielroach6190]

One important part that is left out is exactly which 427 is it? L36? L72? L88? Or one of the 3x2 motors with an Edelbrock C427 intake? Makes a big difference to get a proper read on this one!

[@PetesGarage]

The cast iron version is the L72

[@jlo13800]

I like the 427 tall deck block, its convertible into a 2 stroke@!

[@brianoutlaw7406]

no

[@Mike383HK]

Not L88!! L88 had aluminum oval port heads and a cast iron sort of header!! Back in the day they called them cast tuned port exhaust!!

[@jorgedacosta8957]

The L88 had the Tri Power used in the 1967-1969 Corvette with sidepipes

[@KM-os4be]

Nice ..What cam did you use in this beast?

[@PetesGarage]

I don't recall the number, but it was a couple over stock.

[@edstone5149]

want cam heads comp ratio thanks

[@jimclarke1108]

The best BB 427

[@PetesGarage]

Can't beat 'em

[@Anarchy-Is-Liberty]

Premium quality!! What heads are on it? Rec port or large ovals?

[@PetesGarage]

Rectangular

[@mschiffel1]

How about some realistic dyno numbers using the factory cast iron exhaust manifolds?

[@PetesGarage]

I agree, but that's how the dyno test is done

[@marksimpson7477]

i ran a 2nd design l88 cam in my 67 396 chevelle.absolute dog up till 3000 rpm.but then it screamed.im sure that motor hit 7000 a few times doing burn outs.not a nice street cam but once you hit its power range it was a lotta fun

[@PetesGarage]

That sounds fun

[@williamthunder1414]

I have 69 chevelle with a 427 in it .love it

[@PetesGarage]

Awesome!

[@MicheluceRizzuto]

Were any of the power and torque numbers lessened with the use of the factory exhaust manifolds?

[@PetesGarage]

Yes

[@mrmorgan5003]

There's probably at least 80 more horse power in that engine in just timing and if you had some good 60s high test gas ⛽ 😉

[@PetesGarage]

Possibly

[@Thundarr995]

You're probably right about the gas. I'd like to see what that engine could do with some race gas. That's probably as close to 60's high test leaded fuel as anybody can get nowadays. I think you might still be able to get low leaded fuel for aviation,maybe for boats? I was salmon fishing up in a little town called Sekiu WA. They had a pump labeled leaded for boats only. Idk if there was really leaded gas in the pump? Idk if that pump was actually even being used. Maybe it was only there because everything was really outdated up there. LOL!

[@PetesGarage]

There is more HP in every engine. The question is, does the customers want it

[@mrmorgan5003]

@@PetesGarage If they don't want more horsey power than they need to go buy a prius and you the real man keep the engine that should be shop rule number 1 🤔🙂💪

[@pineyLt]

Is this built to factory specs or does this have a hotter cam, head work, etc… ?

[@PetesGarage]

Yes to all

[@jeffcolt9185]

if you ever get your hands on an original L71 427 Corvette engine I'd like to see one of them on a dyno

[@PetesGarage]

I had one long ago before I started making videos....I'd love to have it back.

[@jeffcolt9185]

Pete's Garage do you know what kind of horsepower it made at the crank

[@PetesGarage]

I don't really recall

[@jeffcolt9185]

probably a little more than the L72

[@kylelee4682]

Hi I'm looking into building a 427 for my 69 nova what tips do you have for me? And what product do you suggest to use for the build original or aftermarket?

[@PetesGarage]

You'll have to look around Kyle. It took awhile and some big bucks to get a '69 block and heads. The rest can be aftermarket. Just go with good name brands.

[@kylelee4682]

@@PetesGarage ill keep looking and saving lol. I was looking into a blue print crate engine also what advice an thoughts do you have that option?

[@michaelteeple8704]

Not sure if it has stock internals but i wonder what chevy claimed for hp numbers in the 60s, 500 is pretty dam good, seems the said under 400.

[@PetesGarage]

With balanced rolling assembly and better flowing heads you can get better numbers than factory.

[@turbochevelle5641]

What is the part number of the cast exhaust manifolds being used? I would like to try a set and see if the will fit my 68 big block chevelle. Thanks in advance.

[@PetesGarage]

If you call Camara Specialties in East Aurora NY they can tell you.

[@turbochevelle5641]

Thanks

[@antilaw9911]

Hey Pete " question?... 427-L88, can I build a 454 to be better than a high reving 427 for the street? Something that makes tons of low end torque ( 500-550lbs) and still get respectable RPM's? At least match the 427 performance or even better with better driver characteristics? Thanks!

[@PetesGarage]

You could, but the 454 is known to be a leaky engine that burns a lot of oil

[@adamanderson5055]

I wonder how much it would put out with the exhaust manifolds.

[@PetesGarage]

Me too

[@YaniT991]

A horny engine with power where you can actually use it! Top job Pete.

[@PetesGarage]

Thank you my friend