psi testing new OEM gen 4 zx-10r intake valve springs
I just performed psi testing on two sets of new OEM gen 4 zx-10r intake valve springs that were purchased from two different suppliers at different times during the past six months. The psi for each spring at full valve open position was as expected; however, the free travel to full coil bind was between 0.050 to 0.060 inches and I expected higher free travel numbers. Prior to testing the psi of each intake spring, I was considering adding 0.015 shims to help mitigate high rpm valve float; however, given the free travel numbers I got, I'm not sure that adding 0.015 shims is a good idea. Any thoughts on adding the 0.015 shims?