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Old 03-25-2007, 10:52 PM
Mike Bartlett's Avatar
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Join Date: Sep 2003
Location: Pleasanton, CA
Cobra Make, Engine: CSX4771-CF. 1966 427 S/O
Posts: 197
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Default Lower oil pressure
I just started my 427 S/O after installing new heads/intake, rings, rod bearings. Prior to this rebuild I was running about 25-psi at idle and about 60-psi at 2500 rpms. Now at idle I am about 10-15 psi and 40-45 at 2500 rpms. I am using the same oil pump, pan, etc. I did change the thermostat from 180 to a 195 which obviously increased my operating water and oil temp to about 195F-oil/205F-water. I am using Delo 15/40 oil but ran out at 8-qts so I added 2-qts of 5/30.

Any thoughts? Are these new pressures acceptable? I will try maybe 20/50?

Thanks,

Mike
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