Now remember what I said about a evacuated crankcase????
If you vacuum the case, OIL CAN'T FOAM.
Mind you there could also be a problem with the oil pick-up being small
or not flowing properly, but that seems remote. Not knowing what motor
you are running I can't offer much help, but do you have a restictor in
the block galley to the heads? Does the pressure return to normal at
idle again? Wet or dry sump?
Anyways,Keith....... A lot of German engines I've built that turn 8 thou
rpm do the same and need restrictors/thin oil/modified pressure
dump/etc.........The problem that also comes to mins is CAVITATION.
Quite a common phenomena in hi-rpm motors.
............DK........................
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Keith Turk wrote:
>
> We had an interesting Problem with the C motor this weekend and I think
> I have answered what the Problem was.. ( thanks to Dave Dalgren )
>
> We had Killer Oil Pressure at an Idle... but as the motor got up above 6000
> rpm it started decreasing to about 45 psi and stayed there.... Basically
> Dave thinks that the Oil was Frothing.... and our Most likely Suspect is the
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