Bobby, depending of where your oil pressure sensor is located (before or after the oil cooler – assuming a stock Rx-7 oil cooler with internal thermostat).   IF you have removed the thermostat in the oil cooler and have not blocked that thermostat opening, then a lot of the oil will not flow through the several passages through the cooler core.  This could mean you are not getting the normal pressure drop across the oil cooler which if your sensor is down stream would mean higher pressure at the sensor – but probably not more than 5 – 10 psi. 

 

Also as Tracy mentioned, if your pressure sensor/gauge is not calibrated then you don’t know for certain if the pressure reading is accurate or not.  Might try a mechanical gauge if you have one or can borrow one.

 

Ed

 

 

I am having a problem getting my oil temps up and oil pressure down without an oil thermostat. Will try blocking some of the air flow this weekend. Is 10W-40 or 10W-30 to light for the gearbox during the winter months?  I plan to run the engine for at least 20 hours on the ground and switch back to Mobil 1 for first flight.

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Wednesday, December 03, 2008 9:12 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: New Engine Break In with Gearbox -- for Tracy

Next best in mineral oil is Shell Rotella.  15W - 50 or similar.

Tracy

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