Max Valve Spring Pressure for Reground Camshaft

RustyRatRod said

Ken Heard at Oregon says the stock Chrysler cores were hardened almost slam to the center of the core. He said they have never ground through the hardness. I guess if you're getting into solid roller territory, it's best to go with a billet core anyway.

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That's weird. He told me that regrind I wanted would definitely grind through any hardening, but since it's mostly on the base circle where spring pressure is lightest, it's not a huge problem. He also said the material itself is such that he wouldn't recommend running much more than 110 seat and 300 open pressures. Seems a light for a small hyd roller, but I guess we'll see.