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Re: 3 angle valve grinding??
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Posted by Frank Kovarick on November 13, 2004 at 23:01:21 from (4.156.231.115):
In Reply to: 3 angle valve grinding?? posted by Lynn Kasdorf on November 12, 2004 at 13:03:22:
You're getting into racing applications with a 3 angle valve grind. Rather than a single possibly 30 degree angle on seat and valve face, the seat has the matching angle of valve to seat at the main contact area. Then in two increasing angle steps of maybe +5-10 degrees on the seat in the head, 2 narrower chamfers "blend" the area past the seated valve/seat to allow better air flow into the head passages. Nothing to gain as I can see for the effort involved in a tractor unless you plan to do "pulls" or other high revs things.
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