high compression pistons

[FattyMcBaggins]

Hey guys. I'm actually an SR owner, but was told to ask around over here for my question...I'm building up my SR and thinking about raising the compression from 8.5/1 to 9/1. Some guys in the SR forum said that CA guys do this. What kind of gains have you all seen? I know it will make the motor slightly less boost friendly, but I don't mind losing some peak power in return for quicker spool or a little more "all motor" power. Any information would be greatly appreciated. Thanks!

[themadscientist]

9.0:1 is not a bad thing. Watch your timing, use good gas and make sure your intercooler is up to the task.

[mikesim]

i say do it! and post back what kind of dyno #s you get.

[silvia_ca18det]

i got .40 over and 9:1 comp pistons for my ca! u need good tuning and good gas!

[float_6969]

I'm at .020 over and 9.5:1. You'd better plan on standalone and no less than 91 octane. Higher if at all possilbe. I've got to run a lot of retard under boost to keep it from knocking. The throttle response and spool is very quick though.

[FattyMcBaggins]

Well, we have 93 octane here in San Antonio. But, stand alone is way out of my budget. I was going to get an enthalpy tune. I might just stick with stock compression if it's going to be a huge amount of trouble. Any more tips or opinions?