A Question for engine builders ... Oil Pressure
06-11-2008, 09:37 PM
#1
A Question for engine builders ... Oil Pressure What is the minimum oil pressure for a supercharger 402? When I first built my engine, the oil pressure was really good. I had 40-80psi from idle to 6500rpm, now I get 30-50psi. I have heard the rule of 7-10psi per 1000rpm. So with that math I am OK, but I want some expert opinions.
There is also a difference in oil weight. First I used 10w40 and now have 20w50. My change to heavier oil was to ensure protection at the cost of a few ponies. I used to drive this car on the street and didn't want the oil getting too thin. But now I might trailer the car to the track.
I would like to get thru the summer with this engine. I intend on pulling the motor this winter for a teardown inspection and freshening.
There is also a difference in oil weight. First I used 10w40 and now have 20w50. My change to heavier oil was to ensure protection at the cost of a few ponies. I used to drive this car on the street and didn't want the oil getting too thin. But now I might trailer the car to the track.
I would like to get thru the summer with this engine. I intend on pulling the motor this winter for a teardown inspection and freshening.
06-17-2008, 10:46 PM
#7
TECH Junkie
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I would feel real good about 80, but 60 would not scare me a ton. The thing that sends a big red flag up on your deal is you lost 30 psi from when the engine was fresh, that does not happen unless the engine has a problem.
Kurt
Kurt
