WesRagle wrote:Hi Guys,Mike53 wrote:If I'm not mistaken theVDO 80 psi sender should have 5 Bar stamped on it the 150 psi would be 10 Bar. The Hummel engines come with the 150 psi senders.
I'll check the sender. I'm thinking mine came from GRT with the EIS. I did buy a second one from them to verify the original. One read slightly higher than the original but was close.
This is an intermittent problem. It's acted up some in the past but it was more pronounced this time. Sure seems like a little "sticktion" of the plunger is likely.
Thanks Again, We'll See,
Wes
Mike53 wrote:With a VDO resistive sender you can easily check the calibration of the sender with an air compressor, regulator and ohm meter. The table below was measured using a new 5 bar sender. It worked out to about 10 ohms per every 5 PSI.
RCfly46 wrote:Mike53,
You do not remember correctly. Memory is the SECOND thing to go...
Joe
Waiex 181 taildragger Corvair project for sale
pfhoeycfi wrote:Today during my second flight I was flying with normal oil pressure across a range of rpm/mp settings (I was taking pics of my panel, all normal) and then about 30 min or so into the flight I saw that the oil pressure was now pegged at 80 psi anytime the engine was at greater than 2500 rpm or so. The pressure did drop off below 2500 rpm and was normal on the ground taxiing back to the hangar. I returned with all of my oil. Any thoughts? Plungers? This is the first time that this has occured since first start of the engine.
I would also like to replace the 80 psi-184 ohm sender with something greater than 100. Any recommendations? Perhaps VDO has a 120 psi unit? It doesn't seem to make sense that the sender does not cover the specified oil pressure range of the engine plus an "alarm" region.
I wish I could get my MX1 to record data...it would be useful right now...
peter
pappas wrote:The oil pressure on my turbo is normally about 80-90 at startup depending on the outside temp. Once it starts to warm, it drops to 50-60 and under cruise 40-50. If it never goes over 100, you shouldn't have any problem and shouldn't burst your oil cooler.
I don't have any issues with the oil temperature getting to 200-220f. Sonex says 240f is the redline. Moisture in the oil doesn't boil off until the oil gets over 200 or so anyway. The increased oil temp can be an indication that it is taking heat from the engine. Both airflow and oil circulation help to cool our engines.
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