TheSamba.com :: View topic - 5 Bar Oil Pressure Guage with 80 PSI sender

Tue Jun 24, 2008 12:44 pm

I have a 5 bar VDO oil pressure guage and recently replaced the VDO dual terminal oil pressure sender with an single terminal 80 PSI VDO sender that Egauge.com says work with the 5 bar gauges. When I do the conversion 80 psi is 5.52 Bar or 5 bars is only73 psi. So will I'm wondering how this will affect the actual gauge reading. Do I need to do a conversion chart to get the actuall pressure.

I'm asking because the pressure seems lower than before at operating temperatures, but I put in a new Schadeck oil pump (which fit a little losser in the case than the OE pump), new oil pressure release valve and spring, and my old sender was a little old and did not produce a smooth signal to the gauge (the needle jerked a bit)...and I broke the connector which is why I bought the replacement one so I cannot put it back on to compare. Anyone else using the 5 bar gauge and 80 psi sender?

I'm still running 10w30 becasue I'm still breaking in the motor after a top end rebuild, but my operating pressure at 3200rpm was about 1.2bar (18PSI) which I do not like too much. The low oil pressure light does not flicker or come on at idle. 150K on motor but endplay and rod play were within specs. Thanks

Wed Nov 19, 2008 8:59 am

This is an old post, but I feel I need to add my experience.

I've installed an Audi gauge cluster which includes a 5 bar oil pressure gauge, a 12 volt gauge, and a 60-170c oil temp gauge. My oil pressure gauge is reading low as well. I think it is indeed .5 bar or about 7psi off. My sender is a VDO 80 psi model while the 5 bar gauge is a 72.5 psi equivalent. I'm using a tee adapter and a factory .3 bar low pressure sender. When I heat up the engine by driving at 75mph for extended periods and then lower the RPM by dragging the clutch until the low pressure LED comes on, the gauge is reading below 0 psi just far enough to seem to be .5 bar off, since the low oil pressure light comes on at .3 bar. Am I making sense?

Also, I'm using a 300F sender while 170C is really nearly 340F. So, my temp gauge is off by 20C.

I'd love to leave the gauges Euro, but if I can't find compatible senders, I'm going to switch to "regular" PSI and Fahrenheit gauges.