how big of an combustion chamber

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Jul 26, 2006 | 09:17 PM

cyko83

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Joined: Jan 2006

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Car: 83 trans am

Engine: 5.7 V8

Transmission: 700R

how big of an combustion chamber

i have a question, i'm about to buy a supercharger and a pair of heads for my car. well my question is do i buy a high combustion chamber heads like a high 70cc or a low like an 64cc chamber??

Jul 27, 2006 | 08:29 AM

roarin_mouse

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Joined: Apr 2005

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From: Central FL

Car: Z-28

Engine: 383 stroker

Transmission: 700r4

Quote:

Originally Posted by cyko83

i have a question, i'm about to buy a supercharger and a pair of heads for my car. well my question is do i buy a high combustion chamber heads like a high 70cc or a low like an 64cc chamber??

Use whatever it takes to get your CR low enough to handle the boost pressure that you intend to use. If this is a stock bottom end, I would stay under 10psi and with a CR of 8.0:1 - 8.5:1. Other opinions will soon be coming but that's my two cents.

Jul 27, 2006 | 09:46 AM

calebzman

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From: Charleston, SC

Car: '85 TA

Engine: 350 turbo

Transmission: T56

Axle/Gears: 3.70 posi 9bolt

It depends on what pistons you have. The less dish on the pistons will require a larger cc on the heads to maintain a low compression ratio.

Jul 28, 2006 | 07:30 AM

cyko83

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Car: 83 trans am

Engine: 5.7 V8

Transmission: 700R

well i have alum pistion but i have cast iron rods and crank. what about if i just change the crank to forge can i just increase the psi in the charger or will i have to change the pistions/rods to??
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ttt

Last edited by cyko83; Jul 28, 2006 at 07:31 AM. Reason: Automerged Doublepost