ok guys here´s my problem..
I purchased a set of 9:1 JE turbo pistons for a B20 vtec a while ago (84mm). Now I´ve got the chance to get a benson sleeved B16 block (84mm too :-)) for a good price and I want to put the JE pistons into the B16 block. I´ll go with a stock B16 head for the first time so what compression ratio will theese B20 vtec pistons have in a B16 block? Is there a way to calculate the new compression ratio?

thanx for your help!!!

 

i calculated about 7.53 or 7.42 depending if that b20vtec is supposed to have a b16 head or gsr head at 9.0 to 1
a b20 vtec would have a 9.0 cr with a b16 head if the piston volume is -12 cc and 9.0 cr with a gsr head if the piston volume is -13 cc.
if you put this into a b16 bored to 84 mm and put on a gsr head you would have 7.61 with -12cc and 7.50 with -13cc piston domes.