1964-1974 [Subscribe to Daily Digest] |
I'm not an expert on oil pumps or pressures. I will, however, recommend the following site that has a pretty clear explanation of how oil pumps work, how pressure is built up and what it means, and the value of high volume pumps vs high pressure pumps. The site is:
http://www.aa1car.com/library/2005/us020516.htm
Again, not being an expert, I can't vouch for the details, but they do seem quite logical.
One of my Sonett's has a performance motor rebuilt by MSS. It is bored, balanced, has a street cam, big valve heads, ported and polished, intake the same, big carb, etc. It includes a special oil warmer/cooler that is installed in series with the oil filter. It has fittings that bring in engine coolant- it serves to warm the oil quicker on cold starts, and provides extra cooling of the oil under hot conditions. It also also a very large oversize oil filter to add a bit more oil volume. The oil pan is stock. Jack also installed what he called a "high volume oil pump" in this engine. I think its more than just a higher relief pressure (different spring).
I have an oil pressure gauge in the car. It runs about 70 psi upon startup. When warm, it maintains 60-65 psi under normal throttle conditions, pushing up to 70-75 psi at full throttle, and bottoms out at about 55 psi at idle. Now this car will easily rev to 7500 RPM and pull strong. The cam/valve springs are good to 8000-8500, but I get chicken and don't go quite that high. The article referenced above talks about a rule-of-thumb of 10 psi oil pressure for every 1000 rpm. Seems like my motor is in that ball park.
So what would I recommend for your motor? Simple- phone a friend- call Jack at MSS and ask his advice.
Eric in Vermont
posted by 68.142.40...
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