Originally Posted by
jerry clayton
Pat
I wasn't referring to any particular cam, just his method--
When I have had to correct valve/piston clearance issues, generally it wasn't because of total lift issues but the location of the notch, angle of the cut or issues around the valve od because of diameter
I have run valve/piston as close as .020but always tried to get more around the valve edge because if you do ever tap one and bend it slightly you need some comfort room
Another area not talked about is valve to valve interferance and cylinder wall prox