i have a friend with a crvtec and he said it lags more than a gsr motor?its a b20 block gsr head,and crv pistions, i told him to put gsr pistons but he didnt cuz the block is too big he said,whats wrong?also he has a p72 ecu

 

now is it a older B20 or B20Z? Huge Difference

 

you told him to put gsr pistons in the b20?

is the p72 stock or chipped? and he's running the gsr stock intake?

 

i think older b20 and stock intake p72