what would my compression ratio be with 72CC heads

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Oct 9, 2003 | 10:00 PM

BOTTLEDZ28

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From: Mass

Engine: 350 TPI

Transmission: A4

Axle/Gears: 3.23

what would my compression ratio be with 72CC heads

What the compression ratio figure out to be with a 72CC head on a stock 350 with stock pistons?

Oct 9, 2003 | 10:05 PM

shaggy56

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Joined: Apr 2002

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From: Armpit state

Car: 71 Nova

Engine: Superramed 383, Topline heads

Transmission: 700r4

Axle/Gears: 8.2 posi 3.08

Try thishttp://www.prestage.com/Car+Math/Eng...s/default.aspx

Oct 9, 2003 | 10:15 PM

BOTTLEDZ28

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Supreme Member

iTrader: (9)

Joined: Sep 1999

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From: Mass

Engine: 350 TPI

Transmission: A4

Axle/Gears: 3.23

just ried but I dont know what the numbers are for deck height, gasket thickness and valve reliefs is can you run me some numbers so I can get an accurate ratio

Oct 9, 2003 | 10:39 PM

shaggy56

Supreme Member

Joined: Apr 2002

Posts: 1,119

Likes: 1

From: Armpit state

Car: 71 Nova

Engine: Superramed 383, Topline heads

Transmission: 700r4

Axle/Gears: 8.2 posi 3.08

Your stock gasket is .028 compressed thickness. I believe your valve reliefs are 7cc stock. This info was from parts for your car. Im haveing trouble figuring your stock deck height. I know deck height is usually an average number amongst most sbc.

Last edited by shaggy56; Oct 9, 2003 at 10:47 PM.

Oct 9, 2003 | 10:45 PM

BOTTLEDZ28

Thread Starter

Supreme Member

iTrader: (9)

Joined: Sep 1999

Posts: 3,871

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From: Mass

Engine: 350 TPI

Transmission: A4

Axle/Gears: 3.23

what about valve reliefs on stock pistons? the stroke is 3.48 right? how much bigger does the bore get to displace 355CI and what is the stock deck height

Oct 9, 2003 | 10:47 PM

shaggy56

Supreme Member

Joined: Apr 2002

Posts: 1,119

Likes: 1

From: Armpit state

Car: 71 Nova

Engine: Superramed 383, Topline heads

Transmission: 700r4

Axle/Gears: 8.2 posi 3.08

355 I believe is .030 over. And yes about the stroke. Finally your stock deck height should .035. Im guessing 72cc is about 8.79:1 compression on your stock setup. Would be nice for a blown motor.

Last edited by shaggy56; Oct 9, 2003 at 11:10 PM.