I installed my ctr pistons on my gsr. I got pretty good power gains especially in the higher rpm range at about 5500. I am playing with the timing advances and am later goning to try to find some 100 octane gas. I am very happy with the power but it feels like I could get more from it. I know tuning is going to be a beeeoch but does anybody have any suggestions on how to get it tuned without using a dyno. If any one else has installed ctr pistons your help would be appreciated. Thanks