What's really cool to me is PS engines run at 10,000 rpm, 1500hp with oil as light as kerosene, and have less oil pressure than my hot idle pressure. The bearings look perfect too. Just Amazing to me
I brought this up a while ago when I freeze framed the crew strapping in Greg Anderson and Erica Enders at a race and saw the oil was around 20 lbs at idle and figured we're good. The 10 lbs per 1000 seems safe enuff............
Like I posted earlier, you have to remember PS has extra cam bearings, and they are almost always roller bearings. That alone allows for much less pressure, and way less volume of oil at the cam.
There isn't much oil in those engines that isn't accounted for.
Smaller bearings, rigid blocks and cranks allow smaller clearance. Cold blocks and coolant allow thinner oils. Thinner oils equals less pressure.
Not a good idea for the average guy to follow the PS lead on this.
David Reher has published this and it can be found on the RMRE web site.
