I have upgraded everything but I had my springs measured and they seem to be seriously lacking in pressure compared to other after market springs. They are not stock springs. I have HKS 272 cams and will be revving to around 8000RPM.
Is there any way to tell if the valve is going to float without just running it and hoping for the best? I'd hate to risk bending valves on my brand new build
What brand and what are the pressure numbers on the springs? I doubt you'll have problems unless they are just slightly better than OEM springs. I even think OEM springs have gone to 8k (not safe but still have).
my buddy has a stang that had the valves float. Only he acct. ran his. When he launched the car it pulled crazzy hard, but as soon as he started hitting hire rpms it just died. His valves never contacted the piston though...i dont know if this is due to more valve to piston clearance or not??
you need to measure the installed height of your springs and add shims to get it back to stock height or your seat pressure will be low.open pressure will be about the same,so dont get the two terms confused. shims are a must after a valve job.the installed height micrometer is only $30 or so from summit or ebay.