im wanting to know if it will be safe to run rs machines oem itr replica pistons in a b20 vtec with gsr cams on a b16 head. also, im pretty sure the piston/valve clearance would be ok with this setup but i was also wondering how much i could mill the head without bumping the compression to high or having to deal with clearance issues. thanks in advance

 

bump

 

maybe you should ask rs machines?

but if its setup as stock with gsr cams there should be no clearance problems.

 

The RS pistons were made just for that combo.They have the bigger reliefs to clear the valves with just about any cams you want.Your cam timing would have to be way off in order for the valves to hit the pistons .Infact the valves will probably hit each other first before hitting the pistons.

 

u dont happen to have any ideo how much i could mill the head do u ?

 

Why would you need to mill the head? compression is pretty high with that set-up already.

 

heads a little messed up and needs to be resurfaced

 

then just have it milled enough to get straight again

 

thats what i would do

 

how much you can mill depends on the rest of your setup. If you'll have adequate clearance between the p2h and the p2v after milling then you'll be fine.