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Originally Posted by Tom Wesenberg
NO cam can be reground and match original specs. Either the lift or duration has to change.
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Not so. The base circle (heal) is reduced in order to have enough "new" material on the other end to grind the stock profile. Here's a good thread on that...
http://www.jalopyjournal.com/forum/t...am-work.36558/
You do have to make up the difference in the slightly shorter total cam lobe. Usually done with adjustable lifters/rockers. With a stock model a valve train you would need new valves so that you have long enough stems to obtain the proper clearance.
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I agree with Mitch to leave it alone since it runs fine now.
BTW, I have a Studebaker V8 and the spec calls for .024" valve clearance. I thought this would make the engine sound like a rear bumper dragging tin cans at a wedding ceremony, but it's quiet.
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I have owned many Studebaker V8s and agree they are quiet engines when the valves are adjusted correctly. It is a function of the "ramp" on the cam from the lobe to the heal letting the valve down gently to it's seat. Contrast with a high performance Chevy V8 solid lifter cam that has so much duration that it has to literally "dump" the valve on to the seat. They make a pretty neat hot rod clatter
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