Quote:
Originally Posted by Jac Mac
Landrover, the old 4 cyl model, but they have a curved bronze sled rather than a round lifter, Nissan L series, Ford Pinto & Cortina SOHC have curved arm running directly on cam.
FWIW the article was poor, did not mention dedicated lifter/tappet oiling or grooved lifter bores which have been the real breakthrough in lifter reliability in recent years
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I'm talking about flat tappet cams operating a lifter or bucket (shim or hydraulic).
Flat tappet cams for direct rocker arm contact are ground differently.
Flat tappet cams for lifter rotation are ground with a 1-3 degree taper, the lobes are offset to the centreline of the lifter, and the base of the lifter is ground with about a 72" radius. All of that promotes rotation, if rotation stops, goodbye cam lobe.
Gary