<VV> Was Hi Vol Oil pump/now lifter oil loss

[BBRT]

Question. In a racing Corvair engine , running stock pump, remote cooler, 10 
psi per thousand rpm ~ 70 psi or so, hydraulic lifters, turning up to 7500 
rpm, why do lifters lose their adjustment, meaning clacking like the oil 
within the lifter is low, after a half hour on track? Are they improperly 
adjusted (nominal 5/8 turn)? Do the valves float causing the lifter not to 
continue to " pump up"? What is happening?

Chuck S



From: "John Kepler" <jekepler at amplex.net>
> FWIW, "stock" oil pumps move MUCH more oil than an engine can reasonably
> handle, that's why there's a by-pass valve in the pump.  Just because a
> little is good, a lot isn't necessarily better!
>
> John