I never had any idea Tony? My guess was something around 5hp, but my stuff was mostly just street/strip cars so it really didn't matter. :smile:
Generally speaking, the pressure on most was either side of 40lbs at idle & either side of 70lbs at 6k+. With the 8qt pan, it was never a issue running out of oil.
I did run a few SBC's in that configuration with only 6qts in the pan and no tray/scrapper.......again, no issues.