911 oil pressure - a quickie - 5-bar or 10-bar

[larrym]

Did those older 911's have higher normal oil pressures than the 3.2?

The oem guage and sender are 10 bar (with no oil warn lite)

The 3.2 sender is 5 bar, and the Bentley book says it is regulated at 4.5 (59 psi) - - - what were regulated psi on the earlier engines?

there must have been a reason the factory installed 10-bar 'way back in the stone age ???

- various authors including Wayne & Bruce say 10psi/1000 minimum;

Anderson (2nd ed) further suggests "anywhere from 4-bar-to-9-bar (130 psi) can be "normal", not to exceed 9 bar


(10-bar seems worthless if the 3.2 is truly regulated at 4.5 bar at 6500)


how much psi is "enuf' - at what rpm ?????????


RESOLVED - I used the 3.2 with oem senders and put in an '80 SC gauge to match


TIA

[Flat6pac]

Either way will work as long as the dash matches the sender on the engine.
Bruce