9:1 or 11:1 better?
Registered User
Joined: Apr 2002
Posts: 480
From: Lincoln, NE, USA
Forced Induction - 9:1
Naturally Aspirated - 11:1
Stock LT1's have 10.4:1 not 11:1
If you plan on running a supercharger, you will need special pistons with lower compression due to the cylinder pressures produced by the forced induction setup. If you are not going to run a supercharger, you will probably be able to run up to 11.5:1 on regular pump gas and still be pretty streetable.
Just my .02
Naturally Aspirated - 11:1
Stock LT1's have 10.4:1 not 11:1
If you plan on running a supercharger, you will need special pistons with lower compression due to the cylinder pressures produced by the forced induction setup. If you are not going to run a supercharger, you will probably be able to run up to 11.5:1 on regular pump gas and still be pretty streetable.
Just my .02
Registered User
Joined: Apr 2001
Posts: 716
From: Calimesa, California. US
If you have the high octane gas available, then the higher the compression ratio (no or little dome on the pistons), the more torque available at the crank. There were many dyno tests done years ago by Ford, Pontiac & others that showed this was the easist way to increase torque.
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