Phil99vette

iTrader: (11)

Well my engine is at the builder and debating about having my motor guy shim the oil pump. I called him today and told him to shim the spring .100 and he asked me if that was correct. I told him I was 99% sure. Should I have him go ahead and shim it .100?
Phillip

C_Williams

I shimmed mine .100. Don't know if that's the preferred amount but for mine, it was good.

While in the pump I suggest polishing the relief plunger and honing the bypass passageway. You can also port the pump's inlet and outlet passageways.

Z-Rated

Im guessing that this would be done to increase the oil pressure? so shimmed and ported how much better than the stock one?

Phil99vette

iTrader: (11)

Yes, this mod increases oil pressure.
Phillip