340 lifter bores bushed or not ?? Solid Roller cam

mini said

Now that makes sense. Id like to put together some stuff on wheel speeds. I'd hate to do all this work and overspin a lifter to grenade it.

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For ever inch of circumference of your cam lobe a .750" roller will roll .15" more than a .800" roller will to cover that 1". Each turn of the .750" roller is covers 2.36" the .800" wheel will cover 2.51" for each rotation.