Roller Rockers 1.5 vs 1.6

Totally agree with PRH and TT5.9MAG on the whole max lift vs cam position discussion as it pertains to piston to valve clearance.
The directions I gave for measuring piston to valve is only if you’re going to contact comp to run their program. And then it is only to see which of THEIR cams will fit at what ICL and rocker ratio. Their directions is to use TDC clearance because it can be done without needing to set up a degree wheel. Their program does the rest with piston location according to rod length and stroke. So that’s really more appropriate if you’re looking at a “larger” camshaft. It only requires a basic dial indicator and base setup to measure accurately. I would think that most cam grinders would have similar programs they could use for the same end.