Quote:
Originally Posted by big_G
My cam is a solid roller, but what does the kind of lifter have to do with economy?..(other than the lash decreasing the effective duration).
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In tests-- way back when, we and other people found solid lifter FLAT TAPPET cams to get better gas milage than the hydraulic lifter types. Rollers have no such issue.
For example, we found a solid lifter cam would make more power than a hydraulic cam with 10 degrees more duration. All other points being equal.