What is the limit compression ratio wise
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From: Pensacola, FL
What is the limit compression ratio wise I was wondering what the limit is compression ratio for 93 octane on a LS1 before you start to run into problems.
Live in Florida with 100+ temps if that means anything.
Live in Florida with 100+ temps if that means anything.
Your camshaft choice will have a lot to do with how much compression you get away with. An 11.5:1 car with a split pattern cam on a 110-112ICL is going to be able to run more timing without detonation than say a single plane cam on a tighter 108-110ICL. Tighter ICL's on the cam trap more cylinder pressure, thus making it harder to run tons of compression without knock. The upside to that is, the increased cylinder pressure can create more TQ and throttle response.
But, to answer your question in short. As Jon said, it's good practice not to go over 11.5:1 in a street car unless you own your own tuning/logging software and can monitor what your car is doing at all times.
But, to answer your question in short. As Jon said, it's good practice not to go over 11.5:1 in a street car unless you own your own tuning/logging software and can monitor what your car is doing at all times.
Im at 12:1cr 24 degress advanced on 91 pump gas. Depends also on your cam specs and how much compression it bleeds out. I did switch to running 30% E85 and tuned it to run more timing with no detonation.
Your camshaft choice will have a lot to do with how much compression you get away with. An 11.5:1 car with a split pattern cam on a 110-112ICL is going to be able to run more timing without detonation than say a single plane cam on a tighter 108-110ICL. Tighter ICL's on the cam trap more cylinder pressure, thus making it harder to run tons of compression without knock. The upside to that is, the increased cylinder pressure can create more TQ and throttle response.
But, to answer your question in short. As Jon said, it's good practice not to go over 11.5:1 in a street car unless you own your own tuning/logging software and can monitor what your car is doing at all times.
But, to answer your question in short. As Jon said, it's good practice not to go over 11.5:1 in a street car unless you own your own tuning/logging software and can monitor what your car is doing at all times.
I agree. I went with 12:1cr but Im crazy like that.
