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Compression Gain - How Much

Old Aug 25, 2009 | 04:29 PM
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slow305rs's Avatar
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Compression Gain - How Much

I recently swapped out my old 081 iron heads for a set of TFS 305 heads on my Camaro. The old heads had a combustion chamber of 58cc the new heads have a 56cc chamber.

How much compression squeeze did I gain with the new (smaller) head? The factory says the motor is 9.3:1?

Just wondering...

Thanks

R
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Old Aug 25, 2009 | 04:34 PM
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SpitotRs305's Avatar
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
Re: Compression Gain - How Much

depends on other factors...
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Old Aug 25, 2009 | 10:45 PM
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Re: Compression Gain - How Much

All other compression-affecting factors being equal, about 2 tenths of a point. Nothing noticeable.
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