Drag Racing Online: The Magazine

Volume VIII, Issue 4, Page
Mountain Magic

The Godfather of “mountain motor” racing engines Sonny Leonard has agreed to join our staff of experts and answer your questions regarding big, big drag racing and marine engines. Sorry one question to a customer so make it a good one.


I have suffered through 2 roller lifter failures and the progressive damage from lifter debri. I run a .778 lift cam in a 588 chev with 260 lbs on the seat and i was wondering what was your optimum combination, [parts, oil, valve lash intervals] to prevent failure of the roller assembly

Dennis Nimphius


Use a pressure fuel lifter and use 20W50 racing oil if you use oil galley restrictors made larger by 50 percent.

Sonny Leonard



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Mountain Magic [3/8/06]
Sonny Leonard Can Cure Your Drag Racing and Marine Engine Problems.


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