Quote:
Originally Posted by Super Bleeder!!
People have run 8500rpms on 272s with stock valvesprings since the dawn of time.
264s, 272s, and 280s all have the same 10.3mm lift and the same ramp rates, so if whatever spring works with the 272 will work with all of them given the same rpm limits.
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I understand that, but since I had a head with quite a few miles on it, I decided to just go with some new springs because I wasn't sure how worn out the stock springs were. I had my head off, and figured it was a good time just to go ahead and upgrade them to assure that I wouldn't run into valve float.
But I didn't know that all the HKS cams had the same lift, so that's nice to know that I could upgrade to those. I never plan on revving over 8500, and the only time the motor would ever see that kinda RPM's would be when it's at the track, which it hardly ever will be. Are the FP3's comparible in lift to the HKS's? Or would running those on crower springs be pushing it a little bit?