Crossflow oil pressure problem..

[JamesH]

Hello all,

1300 Xflow, in a Locost, so pretty standard. Has shallow sump.

After running for just a few minutes, just about hot, oil pressure starts to drop off from usual 50psi. By end of race its normally about 20psi when engine revving, lower if idling.

Crankcase breather exit does have a baffle, and pipe is fed back to the rocker cover, which in turn breathes through a pipe off the filler cap.

I was hoping that the baffle would have fixed this problem which I have had for a while, but seems about the same. I thought maybe oil thrown was being prevented from dropping back in to the engine from the rocker area (via pushrod channels) by crankcase pressure.

Using 20w50 oil.

The only thing I can think of is that the oil pump is a bit crap, even though its new, as supplied with the engine. Has anyone else had problem with new Xflow high pressure pumps?

Any other ideas?

Cheers all

James