The 16v piston won't hit the 20v head's valves, they'r non interference type head. But the 16v pistons don't hv the cut-outs in the right place for the 20v head's valves , so using 16v gze piston with 20v head may make worse combusion than using the gze piston with 16v head. Let's go get some 7.5:1 forged pistons for 20v head and boost it to 20psi!!
Sat, 09 July 2005 13:07
