Fot,
I just assembled a new motor and have a question about oil pressure & oil
viscosity.
I started with Brad Penn 30 wt break in oil and have a new Steve Yott oil
pump.
I ran in the cam yesterday for 20m, retorqued the head and took it out for
some run ups to 3K & eventually 4K.
About 15 minutes of run time. Oil pressure was right up at 75 -80. Before I
could record any notes I smelled oil burning
but it was just a displaced valve cover gasket. Fixed it.
Today I took the oil filter off and cut it open and there was a minor bit of
sparkle in the oil. I have been told a bit is normal.
I decided to give it an oil change and filter at this point. I changed to
Brad Penn 10-30,
On start up at 2000 it was at 75-80lbs. Over a period of 15 minutes running
up to 4K and back down and settling at a short cruise
of 2000 - 2500 the pressure worked it's way down to 50 lbs. I repeated
several times, it would always climb to 80 under throttle
but fall off again to 50 at a 2K rpm cruise. It dropped to 40 around a
corner but ran right up to 75- 80 under throttle.
I decided that was enough & parked it. I had my rod and main journals sized
to .003 clearance.
The big question is, with those clearance am I running enough viscosity ?
Thanks for the input as always
Jim G
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