Quote:
Originally Posted by Shadylane
2020 Rule book: Stock Cars
Cylinder Heads
“Heat riser passage may be blocked from intake manifold side of cylinder head. Blocking passage down in the valve pocket prohibited.”
My interpretation: don’t block anywhere down into the head, but that’s just me. I would hate to get busted for plugging the head when a thin piece of stainless will be sufficient.
Kelly
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Kelly, As long as the plug is recessed a tad and not reshaping the port, it's fine. We've been doing them that way for year....Hettler /Kadar/ Watters , and others.