Building a 10,000 rpm NA engine.

[oab_au]

I don't agree with upping the pressure to get the flow. That will only break the pump rota. Its the flow that we have to get. Pressure doesn't hold the bearings off the crank pin. If the passages are large enough and free flowing then there will be ample oil at the shells.

This is not only a EG33 problem the Nissans have the same problem, same pump. We had a Nissan RB30 that did the rear bearings. Acting on the oil surge theory, the sump was trapped doored like Rally Bob's sump. Still ran the rear bearings. Increased the pump pressure, broke the pump rota.

I had a side valve V8 blown to 14psi. This engine had the worst oiling system there could be. The pathway the the big ends was painfully, so bearings ran. I rearranged the pump to external and ran the oil through copper pipes through the side of the block to feed into the bottom of all the main bearing caps.
The engine ran to 7k with that boost and never did a bearing again.
Head gaskets were a different problem.

I would like the see if there is a chance of getting at the rear of the gallerys, to supply at both ends. Even fitting an accumulator there, to cover the low times.

Harvey.