Originally Posted by
SlowSo basically it's the cam profile that determines if you need stiffer spring and not the rpms you are revving to correct?? For example one wouldn't need the 130# spring for a N1 cam even revving to 9500 but would need it for a Kelford race cam revving to the same rpm because of the aggressive lobe profile, do I understand that correctly??
correct, that's why N1's have softer springs than 20ve's it's the ramp angle of the cam that has to be focused on.
of course the next question should be why does the N1 have such a different ramp angle but that's for another thread.