Max valve lift with stock pistons

[nick6690]

What is the max valve lift the stock pistons can take? I need to know if im gonna have to get my pistons notched. Thanks.

 

[dcurtis]

The amount of cam your engine can take is more determined by the duration of the cam than the lift, and for the most part most cams will clear the stock pistons just fine, most people notch their pistons to accomodate larger than stock valve sizes, what year is the engine and what cam are you looking at installing, no matter what people say will clear you should check for ptv clearance anyways.

 

[nick6690]

im not sure of the year, i just bought the block and pistons from a guy,
but the pistons are forged and they are stock.
the cam i am using is a cc xe282hr with .565/.574 lift and 232/240 duration @ .050.

 

[nick6690]

oh and i have afr 185's with 2.02 1.60 valves

 

[watchdogfour]

.

you will have to have notched pistions to use those parts and i would check with afr on your valve springs i think those 185's are only good for a 550 lift cam

 

[dcurtis]

With the 2.02 valve heads you for sure need to have your pistons notched to clear the valves. And as watchdogfour stated I would check to make sure the springs are compatible with that cam, which I don't think so.

 

[5spd GT]

Peak lift has nothing to do with piston to valve clearance.

The radial clearance will likely be more of a problem than the lift point at a certain duration, during overlap.