I wonder how many HFT failures were using stock grind cams, or modern replicas of stock grind cams, as opposed to modern profile cams.
If you filter out high performance cams and high spring pressures I wonder what the failure rate would be.
I'm curious .... did high performance cams of 40 years ago use similar profiles to modern HFT cams, or are modern cams more abusive to the valve train?
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