Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 11:1 on pump gas or add more gasket??
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Old 02-10-2013, 06:14 AM
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With 11:1 and a small cam its border line but a little bigger cam should work it out. Lots of ppl use 11:1 in there street cars but careful tuning will be needed.

Is the 11:1 measured or just calculated from what parts you have. The tight quench was probably done to hold back the detonation.

I use this calculator to figure compression. And dynamic compression.

United Engine & Machine Co. Incorporated

The larger quench is not ideal with alum heads and good cam it should be fine. Was the engine knocking before you took it apart?

Also what is the piston volume and type this can be very important.

Fyi: i got 10.8:1 when i ran the numbers. With 6cc pistons and 4.1/.041 gasket.

Last edited by hcompton; 02-10-2013 at 06:21 AM.
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