Quote:
Originally Posted by SS Engine Guy
I have been given the same explanation as Alan and also in writing (for what little that is worth). 3 thru tech with not a word said and never used the letter. The only thing I was told that wouldn't fly was a radius valve seat. (which I don't use) However, I have seen them go thru tech also. I think this disinformation is what Wade is trying to clear up.
There is some hp directly behind the valve if work is done correctly. I would think that .250 thou. below the seat would be all that should be allowed in stock. Anything more I would consider a form of pocket porting.
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Well, 0.250" below the
stock valve seat angle
was the rule until they opened it up. Now there is supposedly no limit on the number of angles, and I was told 0.500" below the seat angle would pass. I was told a radius seat was legal as well, I just have not had time to try one, yet.