Hey guys i am putting a motor together for my 75 corvette.

383 stroker
Using the stock 350 4 bolt block .030 over
scat crank 400
stock rods ARP bolts
some pistions maintaining a 10.1- 11.1 to 1 compression with a 64cc head
prolly run a edelbrock performer rpm intake
750 carb


My questions is what cam would be a good choice? Also what heads. CC size. runners. valves. etc.

We are building this vette to be a sunday driver take it to the shows. but with the capabilities of running a road course. salom so on .

we already got the suspension tires and whees done.
But i just told you about what we want i used for so we can keep a good rpm range with good torque and good acceleration.

thanks for the help

 

11:1 is too high for pump gas.

10.3 for aluminum or 10:1 for cast iron.

For a 383 either use dished pistons with 64cc heads or flat tops with a 70-72cc head.
Pick a 170 to 200cc head. Avoid the Dart Iron eagle 180's.
Out of the box flow sucks. Hard to go wrong with all the others. What kind of power are you after? will it be a auto or 4speed? rear gear ratio? idle speed, Power brakes?

Are you looking for a flat tappet or roller cam?

Hood clearance on a 75vette will be very tight with a RPM intake. May need to use the GM L88 air cleaner for hood clearance. A lower height intake manifold is another option.
The Edelbrock EPS intake is a little lower. A Weiand Stealth is lower.Holley/Weiand also offers some Mid rise dual plane manifolds.
I'd mock up the motor in the chassis and see how much clearance/room you have for the aircleaner. The old L88 air cleaner provides the most clearance without restricting flow.

 

no it is not.. i have 11.2:1 on 92 octane.. you just need the right cam to complement the compression..

i would say some sort of a roller cam..

 

You mean pick a cam that is too big to kill off cylinder pressure and power. Doesn't work. Ya still end up detuning it to avoid detonation on pump gas. (retarded timing and over rich jetting). You end up with a motor that is not as fast as it could be. Usually short lived. Yours just hasn't come apart yet. Compression ratio is a slippery slope when you'e stuck with pump gas.
Design the motor by picking a cam, head induction and exhaust system that makes the power and torque band you are after. Then pick the compression ratio that will work well, yet within the limits of pump gas and the wide range of less than idea real world road conditions. You'll go fast(er), longer. for less$$$ overall. there is a lot more power to be had by making the motor breath more air in and out than trying to compress it to the max.

 

you have a point there.. but just saying, you CAN run 11:1 with pump..