Quote: i read an article that the hv pumps only pump more oil under 2500rpm.i think it was a mopar muscle article.
Technically thats impossible, as oil pumps are "positive displacment" pumps in that they move a specific amount of oil per revolution. HV pumps are taller to accomplish this additional displacement. The motor itself might not RECIEVE that additional oil due to the relief valve coming into play above a certain RPM however.
I had a 440 with an HV pump, loose bearing clearances, 4 quart unbaffeled pan that would EASILY suck it self dry (ever wish you could do that?).
