Cam And Lifter Hardness Testing

pittsburghracer said

I think he said there should be .002 taper on a good cam. You should be able to pick that up with a set of mics.

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Right quick like. On the subject of taper, I've often wondered just "how much" of an advantage the low taper camshaft had in the original 440 Six Pack and Six Barrel cars. It was supposedly done to reduce friction and "free up" a little power. I just wonder if it really worked and "how much"? I can't see it making a noticeable difference.