ZL1 oil pump
In my new solid lifter 427 motor I'm running the GM 396870 (1.3" gears) oil pump and my oil pressure is 43 psi hot at 2000 rpm and above, never higher. At idle(1000 rpm) it is 15 psi. My main bearing clearences are .0028" rods .0025". Crank is #7115. Oil is 10w-30 and 10w-40 did'nt raise it more then 2-3 lbs. Is this normal for this pump?
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1968 Z/28 34,000 mile, born with engine and trans, Shipper, California car, Fathom Blue, deluxe interior, M21, 3.55 Posi
1962 Oldsmobile Jetfire, Factory all Aluminum V8 Turbocharged and Methanol Injected TURBO ROCKET engine, 4 speed Hydramatic, 4 link rear suspension, 3.36 Anti-Spin differential, California car, PS, PB, PW, AC, Jetfire 2 option package.
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