Gonna pull some valve springs and test them. First, my cam is a SFT with .625/.595 actual lift after lash numbers. My current pressures are 145/410 with titanium retainers. Would this be enough? What pressures should I have up to 7000rpm? I need to get a spring tester, which one would you suggest for best accuracy under $200. This cam is in my 511 and is 270@50 on a 110.