[Aml383]

considering building a high rpm race motor out of this nice old small journal 1967 327 . I've got some ideas that I'll lay out here and I'd like some good solid constructive advice/ criticism from guys that are more knowledgable than myself. I'll lay out what my idea is below and then whoever wants to....go ahead and let me hear it / have it lol
I'm currently building a 385 torky for street use that wont see more than about quarter after 6 that's gonna go in my 66 chevelle this spring .
But on with the 327 plan/idea .
This piece of history has been layin on the floor since 03 when I traded an 83 350 882 headed mexican block s h itster for it lol
It's been begging me ever since .
Im thinking maybe build this thing to twist 8300 rpm max 450 to 500 power at about 8 grand with a very long duration high lift cam and run a 456 gear with a stout th350. 13 to 1 or more CR
First off I'm thinking I need to build as much torque as I can because of the smaller inches.
How to do that is the big question along with the small cubes lol
So now I dont think I can put a 350 crank in this block seeing as it's small journal but correct me if I'm wrong .
I'm going to assume for the moment that I cant . So if that's the case I guess I'd be better to use the 327 crank that's in the block now for more torque versus putting a 283 crank in it and destroke it to a 302 . If I did the latter I could spin it to the moon but is there a way I can get more torque that way ??
Longer rods ?? Idk .
OR might I be better off with the 327 crank ?? And if that's the case the question of building torque still begs .
And how much can I would I should I bore this block given the stated goal ?
Then for up top maybe a small cc runner head ?? 180cc or less ??
Then I thought I'd run a true dual plane without a cut out in the divider with quite a bit of carb on top and maybe an anular booster. The smaller heads and the dual plane intake ought to help out with the torque I'm thinking but again I'm wide open for any suggestions or critique. I'll take anything you got other than " start with bigger inches "
Because this is what I got and it's a 67 and it's cool and I want to build it and thats my story and I'm stickin to it lol

 

[68maliblue68]

Definitely wouldnt put a dual plane manifold on it if you’re going for 8000+ rpm. Since it sounds like a nostalgia/gasser style build put a tunnel ram on it

 

[Aml383]

Definitely wouldnt put a dual plane manifold on it if you’re going for 8000+ rpm. Since it sounds like a nostalgia/gasser style build put a tunnel ram on it

Sounds cool . I knew a guy who actually did that on one . I never saw it but he talked it up good lol. Said the car tore alot of other cars up

 

[fred's old chevelle]

Make sure you have good rod bolts or aftermarket rods, screw in studs and good valve springs and a cam suited for your rpm range. Send it !

 

[VORTECPRO]

considering building a high rpm race motor out of this nice old small journal 1967 327 . I've got some ideas that I'll lay out here and I'd like some good solid constructive advice/ criticism from guys that are more knowledgable than myself. I'll lay out what my idea is below and then whoever wants to....go ahead and let me hear it / have it lol
I'm currently building a 385 torky for street use that wont see more than about quarter after 6 that's gonna go in my 66 chevelle this spring .
But on with the 327 plan/idea .
This piece of history has been layin on the floor since 03 when I traded an 83 350 882 headed mexican block s h itster for it lol
It's been begging me ever since .
Im thinking maybe build this thing to twist 8300 rpm max 450 to 500 power at about 8 grand with a very long duration high lift cam and run a 456 gear with a stout th350. 13 to 1 or more CR
First off I'm thinking I need to build as much torque as I can because of the smaller inches.
How to do that is the big question along with the small cubes lol
So now I dont think I can put a 350 crank in this block seeing as it's small journal but correct me if I'm wrong .
I'm going to assume for the moment that I cant . So if that's the case I guess I'd be better to use the 327 crank that's in the block now for more torque versus putting a 283 crank in it and destroke it to a 302 . If I did the latter I could spin it to the moon but is there a way I can get more torque that way ??
Longer rods ?? Idk .
OR might I be better off with the 327 crank ?? And if that's the case the question of building torque still begs .
And how much can I would I should I bore this block given the stated goal ?
Then for up top maybe a small cc runner head ?? 180cc or less ??
Then I thought I'd run a true dual plane without a cut out in the divider with quite a bit of carb on top and maybe an anular booster. The smaller heads and the dual plane intake ought to help out with the torque I'm thinking but again I'm wide open for any suggestions or critique. I'll take anything you got other than " start with bigger inches "
Because this is what I got and it's a 67 and it's cool and I want to build it and thats my story and I'm stickin to it lol

"Because this is what I got and it's a 67 and it's cool and I want to build it"


That was exactly my thinking when I built one myself.

 

[VORTECPRO]

"Because this is what I got and it's a 67 and it's cool and I want to build it"


That was exactly my thinking when I built one myself.

 

[Droptop72]

If you are going to turn THAT kind of RPM with a small journal two bolt block, you are a MUCH braver person than I am.... My uncle ran a reasonably successful late model with a 331 SBC on a half mile track back in the 80's and it did OK, even though it was giving up power to the guys that had 350's. That motor would SCREAM, but one night she gave up the ghost just past the start finish line, and about the only parts we were able to salvage was the intake manifold, carburetor, water pump and one valve cover. It destroyed EVERYTHING else.

 

[billdini]

I have the 68 L79 (large journal forged crank) with the other differences being a 750cfm Rochester and cast iron manifold. I am also using the GM 151 L79 grind that pretty much limits the RPM to 6000RPM. Max hp is at 5800rpm. I have the same 30 over 11 to 1 forged pistons and 202 double hump heads so it is now a 331ci. It runs strong, probably very close to my favorite engine the 70 LTI. I do not have headers but I have better flowing exhaust and ths engine has absolutely no problem pushing my well equipped 68 convertible around even with AC on. Gears could be better with 2.20 first gear (M21) and 3.31 12 bolt posi. However with a little work it could spin up to 7000 rpm's since the lower end is forged but it would not be a race engine in today's world. My last car was a 2014 GT500 Supercharged making over 700hp so that really makes my comparison unfair to the L79. It would be an enjoyable, fast package but not a race engine by any standards today. With the right gears, cam and ignition it would be a very easy mid 12 second machine. I love my L79, just a great all around engine, good mileage, plenty of torque and it wakes up fast at 3500 rpm.

 

[chevcraz]

Recommend reading for a 327 is Bill Jenkins book
I had lots of references to that book when I built a bracket engine a few years ago.
One of the best engines I had, miss that sound shifting at 7200! Not quite the 8K+ your looking for but a bit more port volume and cam would have put it there.
It ran on 93 octane and had a best time of 11.63 @ 118 , 7200 rpm shift, in a 3000 lb 67Nova
330 CI, large journal forged crank in a 4 bolt 350 block.
Flat top KB piston, full float pins and Eagle rods. .020 negative to deck.
New GMPP vortec heads, hand ported, factory valve job, 1.94, 1.5 valves, cut for double springs and screw in studs, milled .020. Felpro .015 shim gasket.
Comp XE282S tight lash solid flat tappet, advanced 2deg
650 mighty Demon, 1/2” Wilson tapered spacer on a RPM Air gap, Super Victor slowed the car down.
Locked out MSD @32 degrees

Build it!!

 

[p40]

Definitely wouldnt put a dual plane manifold on it if you’re going for 8000+ rpm. Since it sounds like a nostalgia/gasser style build put a tunnel ram on it

a dual plane would kill his top end if he wants to go 8 grand

 

[Alex_NY]

If it was me, I would have Vortecpro build it per your goals.

Takes the guess work out, and precise / accurate machine work and clearances is way more important in any built, in particular high RPM engines.

Alex

 

[hessz24]

We built a 327 for my dads camaro about 30 years ago. It’s the original two bolt 67 motor in his Camaro. It has 10 to 1 flat tops we had a shop build the 202 fuel heads chambers are cut to 58 cc. Has a Lunati 525 lift cam, Old school Edelbrock torker single plane with new Holley 700 carb. I know she spins 7500 easily. I think we had it up to 8000 a handful of times. It’s def doable. Or just take that 327 and build yourself a 302.

 

[Aml383]

And ??

"Because this is what I got and it's a 67 and it's cool and I want to build it"


That was exactly my thinking when I built one myself.

And ?? Lol. Howd it work out ?
What combo

 

[Dads 72 Malibu]

Couldn't you have the block drilled for splayed 4-bolt mains?
Main studs. Billet caps. High perf H-beam rods with ARPs. Forged 4340 crank (you may be able to get a small journal 350 made/ground - if desired). If not, I'd stick with the 3.25 stroke. Forged pistons 12.5 - 13:1 (if you have a steady source of race gas - you may be able to go as high as 14:1 with the right head/cam/timing). Definitely not use a dual-plane if you're looking to spin it to 7500-8000+ - may be able to get away with a torker, if hood clearance is an issue, otherwise I'd go with a Victor Jr. or the aforementioned tunnel ram.
You will be spending a bit of time conversing with your cam and head companies. 180cc seems WAY too small considering your desired rpm peak - but that would be for your cam grinder and head manufacturer to help you with.

Good luck - Sounds like a screamer....

 

[Aml383]

Cool . Nice solid build. That one spun to 6400.
What you think I'd need to spin up higher like up to 8 grand ?
Bigger head ?
Longer cam ?
I get the point about the single plane
Anything you can think of to gain some more torque?

 

[Aml383]

Couldn't you have the block drilled for splayed 4-bolt mains?
Main studs. Billet caps. High perf H-beam rods with ARPs. Forged 4340 crank (you may be able to get a small journal 350 made/ground - if desired). If not, I'd stick with the 3.25 stroke. Forged pistons 12.5 - 13:1 (if you have a steady source of race gas - you may be able to go as high as 14:1 with the right head/cam/timing). Definitely not use a dual-plane if you're looking to spin it to 7500-8000+ - may be able to get away with a torker, if hood clearance is an issue, otherwise I'd go with a Victor Jr. or the aforementioned tunnel ram.
You will be spending a bit of time conversing with your cam and head companies. 180cc seems WAY too small considering your desired rpm peak - but that would be for your cam grinder and head manufacturer to help you with.

Good luck - Sounds like a screamer....

I've got some skip white NKB heads that are 200 cc . Maybe I ought to use those.
I'll reach out to cam and head suppliers like your suggesting and see what they say . Thanks man

 

[billdini]

I have been a hipo SBC guy my whole life and built many strong engines. My least favorite was the 283 and the 302. Just too small and they never seemed to get it done dual quads and all. My two #1 engines to modify were the 327/350 and the 350/360 engines. The later held the title for the fastest street car (Z28) for a couple years in the Lexington Ma area and this was in the early 70's. I have never ever seen one spin to over 7000 rpm back then solid lifters and all and I suspect the ones that did had an inaccurate tachometer. Not saying they couldn't be modified to do it but it wouldn't have decent street manors and would never be an daily driver, not back then. It takes a lot of money to make a engine spin to 8k and hold together.

 

[wes migletz]

Couldn't you have the block drilled for splayed 4-bolt mains?
Main studs. Billet caps. High perf H-beam rods with ARPs. Forged 4340 crank (you may be able to get a small journal 350 made/ground - if desired). If not, I'd stick with the 3.25 stroke. Forged pistons 12.5 - 13:1 (if you have a steady source of race gas - you may be able to go as high as 14:1 with the right head/cam/timing). Definitely not use a dual-plane if you're looking to spin it to 7500-8000+ - may be able to get away with a torker, if hood clearance is an issue, otherwise I'd go with a Victor Jr. or the aforementioned tunnel ram.
You will be spending a bit of time conversing with your cam and head companies. 180cc seems WAY too small considering your desired rpm peak - but that would be for your cam grinder and head manufacturer to help you with.

Good luck - Sounds like a screamer....

I used splayed 4 bolt main caps from program engineering on a stroked 283 and a stroked 327 I built.

3 3/4" Stroked 283

3.875" Stroked 327

 

[Aml383]

This block is goin to the machine shop to get checked out this coming week.
I was thinkin about makin it like a 302 high spinner with a 283 crank but idk maybe ill just do something more along these lines.
Not sure what would be faster.
That's kind of the deciding factor.
I've got some real nice 68 186 202 heads that would work real nice on that motor .
Your son had to love takin a truck with a motor like that in it !
Had to be the talk of the class lol

 

[Aml383]

Recommend reading for a 327 is Bill Jenkins book
I had lots of references to that book when I built a bracket engine a few years ago.
One of the best engines I had, miss that sound shifting at 7200! Not quite the 8K+ your looking for but a bit more port volume and cam would have put it there.
It ran on 93 octane and had a best time of 11.63 @ 118 , 7200 rpm shift, in a 3000 lb 67Nova
330 CI, large journal forged crank in a 4 bolt 350 block.
Flat top KB piston, full float pins and Eagle rods. .020 negative to deck.
New GMPP vortec heads, hand ported, factory valve job, 1.94, 1.5 valves, cut for double springs and screw in studs, milled .020. Felpro .015 shim gasket.
Comp XE282S tight lash solid flat tappet, advanced 2deg
650 mighty Demon, 1/2” Wilson tapered spacer on a RPM Air gap, Super Victor slowed the car down.
Locked out MSD @32 degrees
View attachment 703381

Build it!! View attachment 703336

Look what they're getting for this book