Piston to valve clearance?

[LEEDAY Boss]

Anybody running a Comp Cams XE274HR with stock shortblock and ported E-7s. Was wandering abou PTV clearance with 1.6RR.

 

[BlownFiveLiter]

With .555/.565 lift I/E, you'll almost certainly run into PTV clearance issues, not to mention coil bind if you're running stock valvesprings. Having that much lift, you absolutely must check clearances. I think the recommended clearance is somewhere around .110 for intake, and .080 for exhaust.