Quote:
Originally Posted by PJ305
" Any valve job permitted " What does that really mean? In old rule books NHRA gave you an example of what an accepted 3 angle was supposed to look like along with measurements. If you have small intake runners to keep velocity up, are you allowed to put your heads on a serdi machine and open up the bottom angle as big as you want with a cutter off the valve guide and still be legal under there new any valve job rule? You did not grind, sandblast, acid port, shot peen or anything else, you simply did a fancy valve job on a machine with cutters off the valve guide. Will NHRA tech allow this if the runner cc checks or will this be a gray area judgement call " the famous I don't like the way it looks " I don't think Wade or any of us want to here that phrase anymore.
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I was told that any cut had to be concentric with the valve guide, it had to be a cut, not ground, and the angle/shape had to go all the way around the bowl/seat, 360 degrees, and there was no depth restriction. Legal port volume must be retained.
If I were going to do something like that, I'd "get it in writing from Glendora", and keep it in the notebook that goes with the car.