Re: Flat tappet lifter failure
A roller cam may let you have more area under the lift curve for a given seat duration than a flat tappet cam. Max velocity for a flat tappet will vary with lifter diameter. So a flat tappet Chrysler with its .904" lifter can have a greater max velocity than a GM .842" lifter diameter.
It would be interesting to see what these cams which will not live look like on a spin tron.
Stan
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