I'm planning to raise the compression of my 2000 Civic Si to 11.5 from 10.2 What kind of power/torque gains should I expect? Will I get power starting from idle to redline? Or from midrange to redline and none whatsoever at idle to low 2K rpm's? Thanks

 

Prob 8-10 hp WHEN you dial the cams as their timing will be affected. Torque def improves (I run ~11.5:1) but you will still not get v8 pull low down. But def. will notice it. You may have to dial back the "electrical" timing, that is retard it slightly or you will get knock....

 

I believe the standard equation is 4% for each point of increase, and this for the entire rev-band.

 

Thanks very much guys. I'll look into it.