I need a 10.5:1 piston for my 383 that i can have fly cut to clear my valves. any help is appreciated, because the pistons i have now are not going to clear my large 2.08 valve with my lift being .583 and 5.92

THanks in advance

 

srp has many with large valve reliefs

 

do you have a suggestion as to what piston to use, that is a really good brand, and do you know if it is thick enough to flycut?

 

It might clear, and it might not. It depends on what the valve lift is at a point far away from peak lift (i.e. the .582" and all that, doesn't matter).

The only way to know, is to put a piston on a rod, assemble it to the crank, put the cam in with the timing set on like you intend to run it, put a head on with some sort of realistic head gasket simulation, and measure it.

I know you're getting tired of me telling you that..... but belive me, it's the only way you'll know.

I can tell you, that with that little bit of lift, you shouldn't have a problem, especially not if it's a roller cam; because the duration is going to be so short (like less than 250°) that the valves will be pretty much entirely closed the whole time that the piston is anywhere near TDC. If you're really really worried about it, and you've already got a set of pistons that your bore is honed to, have the valve reliefs for the intakes cut about .050" bigger in circumference.