How are you checking the seat pressure and open pressure of your springs? The installed height is really just a baseline, whereas the spring pressures are absolutes. And just because you achieve the ideal installed height, doesn't mean the installed seat pressure or open pressures will correspond. That's why they make offset retainers and shims so you can tune the pressure more so than just the installed height. I know the .015"-.020" doesn't sound like a lot, but on a hydraulic cam it can be problem if you don't at least know where the pressures are. I guess what i'm trying to say is there are a few more important things that need to be checked in this exercise than just the installed height.



Class III CNC Machinist/Programmer