what is the highest compression possible to run with 93 octane? after tuning of course.

anybody know the increase in hp with going to 12:1 - 12.5:1 compression?

 

depends on your cam. static compression is pretty much meaningless. you need to calulate your dynamic compression. People are running 13:1 static compression on pump gas with long-duration cams.

 

I agree.
Most setup can run 11.5 or higher with 93.

 

iam running about 11.1 right now just fine.

 

i run 11.3 to 1 with no problems. you can expect about a 3% increase in power across the board from going up a full point in compresssion. full point as in 10:1 to 11:1. id say the highest compression you want to run on pump gas is about 11.7:1. anything more is really pushing it, and if you have to pull timing because of it, your gonna be losing power not gaining. stay below 11.8 to 1 and you should be ok.

Scott