Hello. I have a question about the Wiseco pistons.
Can the intake valves hit the pistons if the cams are very "aggressive" and you run full advanced on the vtc?? Or is the valve pockets deep enough on the wiseco pistons?
My plan is to use either the jwt C9 or the Kelford stage 3 cams.

Thanks

 

part of ordering pistons is telling your piston company what your cams are are and if they are unfamiliar with the specific cams then E-mail them the cam card... and if there is still no certain answer during the moc up stage put playdough on the valve reliefs and turn the engine over 2 complete cycles and then disassemble and check you piston to valve clearance... or have a professional who knows what they are doing build your engine... or not and rooooolll the dice

 

I have run C-9's on stock bottom ends and with a set of Arias pistons with 11:1 compression and had no problems with clearence.

 

Last time I checked Arias 11:1 pistons are not part of "stock bottom ends"

 

Call JWT, they will know. I asked about my C8 cams, and am safe to 12:1 compression or so, maybe a bit more... but I'm going with 11:1 so it's a non-issue for me. Definitely call them though.