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Discussion Starter #1 (Edited)
Im trying to line up a small block for my nova, looking for over 300hp mark
302 or 327 or 307 or 350
(I love thought of a 302!)
Either motor i'm probably going to run a set of camel hump heads,
a Vic Jr Intake
A flat tappet cam with the specs:

INT / EXH
Duration @ .050 : 236 / 244

Lift : .490 / .485

Lobe Sep : 108
Intake Center: 108


Soo which should I build?????
 

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Welcome to the site. Do you already have the cam shaft? The reason I ask is that I would not pick the can until you know what size engine you are going to build, what heads you will have, what trans you will be running, rear end gear ratio, etc. I personally would build the 350. And for just about the same money, you can stroke it to 383. Cubic inches will win every time.
 

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"Cubic inches will win every time. "


^^^^^^^^YUP-what he said:D
leftcoast carl.
 

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Discussion Starter #4
Well, I havent bought any motor parts yet, its all going to be street driven, Ive got a 200r4 trans and 3.36 gears in a 10 bolt

I really like 302's, I like revving it to the moon!:jumping:
That and everyone has a 350 or a 383 right, I love dare to be different builds!
 

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I used to have a 301 chevy with the 30-30 cam in it when I was in high school. That thing would fly and rpm like you couldn't believe. I used to beat a lot of cars with 327's in them. I say build what you want. Like you said, everybody has a 350 or a 383.
 

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Here we go again with the revving to the moon thing--ANY size small block Chevy will rev as high as your wallet will allow. My 410" sees 7000+ easily. My old 391 saw 9000 a few times...OOOPS! I have a friend with a 439" that was shifted at 8200 and ran 9's in a 4000 lb. car. The main reason the old, small engines were revved so high was that was the only place they made any power. My 410" makes over 600 at 6900 RPM, yet makes at least 500 lbs of torque between 3800 and 6300. Your 302 won't see that kind of torque at any RPM.
 

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Sounds like your mind is set. I want to do a similiar build some day but with a 327. Think it can handle it better and they have come stock with almost 400hp:)
 

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get ready for maintenance.... any small stroke engine is going to have to rev.... and those revs are going to be costly in parts replacement.. like valve springs, .. and periodic tear down... to inspect for fatigue... when swinging a engine 8000 to 9000 it takes its toll on the parts...

you would believe it or maybe you will.. a good solid FT 350 built right, and with the properly select components will see 8500 all day long...... that was back in 1975 or 76 in a 56 belair... that engine saw regular Saturday night drags.. it did live for three years...

but back to the 302... whats so special ?? in order for the 302 to do any thing you going to need a minimum of 4.11 gearz, 4.56 would be better... a turbo 2004 will not like the 9000 rpm band, if you build the 200r to take that, then you will be needing a 4500 to 5500 stall converter.... suggest you find a face plated 4/5 speed...


face it the 302 was developed for limited trans am racing (5.0 liter) (3 years only) then Trans am went to a 5.7 liter and the 350 which was introduced the same year as the 302 was.. the 350 was already a beast in the form of the LT1..by the time the 5.7 rule came in.

didja know the 350 and the 302 were only available in one car in 1967? yep the Camaro...

now if you were going to race super comp or something like that where 13000 rpm is done on a regular basis.. with engines of under 300ci...have fun.. but you will not like the street manors of a hard hitting 302 in a blvd cruiser with out steep gearing...your going to have to get it in its power band and keep it there...


what to be different? build a 500 caddi and suff it in there, add a 200 shot of N20 and watch the tires melt off cause you will be making in excess of 700ftlbs of torque
 

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Here we go again with the revving to the moon thing--ANY size small block Chevy will rev as high as your wallet will allow. My 410" sees 7000+ easily. My old 391 saw 9000 a few times...OOOPS! I have a friend with a 439" that was shifted at 8200 and ran 9's in a 4000 lb. car. The main reason the old, small engines were revved so high was that was the only place they made any power. My 410" makes over 600 at 6900 RPM, yet makes at least 500 lbs of torque between 3800 and 6300. Your 302 won't see that kind of torque at any RPM.

And least not with 3.36 gears, you have to gain a mechanical advantage somewhere i.e. transmission and rearend gear. I had a 301 in my 55 chevy with 4.88 gears, had the Z28 optional cam and 11.5 to 1. Without the gears and a heavy car that engine wouldn't pull a straw out of a milkshake.
 

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Here we go again with the revving to the moon thing--ANY size small block Chevy will rev as high as your wallet will allow. .
X2... I dont know why people are so hung up on small cube motors and revving them.. If you are building this for street use and only 300hp, why would you rev it hard???? How many times on the street will you see 7000+??? A street 302 would be fine, but it would need a small cam to build more tq down low...and wouldn't like to rev
 

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I had a basic 307 combo with a little .454 lift cam in it. 9:1, basic bolt on stuff. 2.73 freeway flyer gears with a 200r4 overdrive. It would idle down the road at about 1,700 rpm. Ran 13.9's and daily drove forever like that. Why does everyone insist on putting ridiculous .550 lift day long duration cams in these little engines? What did they ever do to you? :eek:

Kev
 

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ur 406

ever do this ?


302's / 283's are fun ,,, they just seem to keep winding ,,,

maintenance ,, yeah ,,, keep some pushrods and tools in the car ,, a flat tappet will surprise you what they'll stand

a 302 , 513-557 gear and a 4 speed would be fun on the street,,, 5 speed with a deep 1st and a 411 ,, you have to make up the difference ,,, and forget a hyd cam ,
 

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did 8500 several times with a 11:1 LT1 355 and a crane Fire ball cam, and a set of turbo heads... thats a half inch more stroke...

my 385 sees 7300/7500 and could see 8k if need be but that hasn't happened yet...


consider that prostocks see in the range of 14k 8500 aint so much any more... and that super comp sees 12 to 14k as well... and they are below 300ci...
 

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if i

really wanted to put on the battle helmet , to take on the attack of haters , i'd tell ya about the time i saw a 283 with stock pushrods , pressed studs , stock valve springs , stock rockers , and the 30-30 cam go 8800 ,, but ,, i don't wanna start a fuss on here ,,, WHUPS
 

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I'd chose torque over hp anyday of the week. Its what gets things movin. when you wind a motor to the moon your just askin for all kinds of problems, it can be a beating on your wallet too. If you want the motor to last, build a motor with good torque and cam it to keep the r's down below 6500.
The cam u have is not going to work very well in anything smaller than a 350. This is what i found with your cam numbers... http://www.summitracing.com/parts/CRN-113542/
I wouldn't use that cam without 9-1 compression. Its an "ok" cam, as long as the heads, intake and exhaust flow well, but dont forget you will also need high tension valve springs and screw in rocker studs with that cam. The rpm range is stretched way up there @ a 3000 - 6800 power band, and in my opinion thats pushing it a bit on the street.
Like many have already said, you will not like driving an over camed, low rear ratio car on the street, and it will be over camed in anything smaller than a 350 at least for street use.
with that said, 350's are an excellent and plentiful choice. a stroked 350 is even better. 400's are good motors too but harder to find, and a good cooling system is a must with a 400 due to its semisized bores.
My suggestion, use a slightly shorter cam, like comp cam 280h or something around that nature. Use the heads and grab a sturdy running 4 bolt main 350 block, disassemble it, hone the cylinders, slap some moly rings, federal mogal bearings, forged flat top pistons, and hit the road haulin balls.
With a good flowing intake and exhaust system you can easily see 400 hp. with this combo.
 
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