Seems like there are certain quench ranges that cause issues too. For some reason quench from .070” to .09” range is worse than .09 to .14”. Then after sometime after .14” issues start to show up again. See that on open chamber stuff to where we milled the heads and quench end up in that .070” -.090” range, has some extra issues, each engine acts different though. Not sure the RA heads will be much different, my guess is they are going to respond similarly, I would keep out of that .07-.090 quench range.
Last edited by Jay S; 07-16-2021 at 10:18 AM.
Reason: Aff
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