heavy85 Posted October 29, 2004 Share Posted October 29, 2004 I just got done porting my P79 head (well just gasket match and smoothed out the casting marks) and am starting in on the valves. I've searched but not come up with any specifics other than 'polish valves' so what should be the surface finish on the stem, the top (port) side and the bottom (chamber) side - I'm thinking there may be a difference but dont know? I found I can get a mirror finish by stepping through several grits of sandpaper and ending with metal polish but where should I stop? Also, there is a chevy bow tie-ish mark cast onto the bottom side of the valves -should I grind this off to make is completely smooth or just leave it? The reason I started in on the head was from the carbon build-up on the valves in the first place so I'm mostly trying to reduce that in the future but any performance gains would also be nice. The head had already been shaved and it's got a Schneider cam (I think), tripple Mikuni's, MSD, header, etc ... Thanks Cameron Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.