Quote Originally Posted by jerry clayton View Post
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
yes jerry i know what you were talking about.i fly cut some pistons and i go 050 more on the od if i can get it.... i was just talking about the cam he had