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Old 07-21-2004, 00:37   #1 (permalink)
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oil pressure of new engines

i spun the oil pump over with a drill on the weekend, and it read 82psi, thats with a hi-volume pump and 20-50 penrite running in oil. Does that sound high, or just because its a new engine and thickish oil?
after running the cam in for 20mins, im thinking of using a 10-40 oil.
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Old 07-21-2004, 01:01   #2 (permalink)
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Re: oil pressure of new engines

Sounds about right for a cold engine. It'll prob drop to around 60-70psi when warm @ high rpm.

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Old 07-21-2004, 06:41   #3 (permalink)
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Re: oil pressure of new engines

Quote:
Originally Posted by qwikcorty
i spun the oil pump over with a drill on the weekend, and it read 82psi, thats with a hi-volume pump and 20-50 penrite running in oil. Does that sound high, or just because its a new engine and thickish oil?
after running the cam in for 20mins, im thinking of using a 10-40 oil.
Considering that it is winter and that the engine is cold (unless you keep it in a heated garage) and that your drill probably runs at 1800-3000 RPM (that's like running the engine at 3600-6000 RPM), I would be more concerned over much lower oil pressure.

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Old 07-21-2004, 17:42   #4 (permalink)
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Re: oil pressure of new engines

I would caution using penrite after the few lots i've used.

First the XF making terrible lifter niose, replaced the oil with penrite again, problem came back after 1 week, replaced with pennzoil 'street machine' blend... problem fixed! Hasn't come back in 2 months.

The old BB 390 was even worse. The penrite went in 3 days before the dyno tune was ment to happen. The lifter noise was so bad the guys at Hallam wouldn't let the car on the dyno. The first thing they said was 'Your using penrite aren't you?'. Apparently they have heaps of problems with it and despise it. I wanr back to pennzoil street machine, niose was basiaclly gone, but did show up a major ring seal problem at 2000rpm+ so its rebuild time! (stock '65 engine, not a bad effort!).
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Old 07-22-2004, 01:03   #5 (permalink)
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Re: oil pressure of new engines

Quote:
Originally Posted by davis
Considering that it is winter and that the engine is cold (unless you keep it in a heated garage) and that your drill probably runs at 1800-3000 RPM (that's like running the engine at 3600-6000 RPM), I would be more concerned over much lower oil pressure.

:davis:
the drill was running at 200-400rpm, i hope to see what it is when its hot this weekend when i start it up.
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Old 07-22-2004, 01:39   #6 (permalink)
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Re: oil pressure of new engines

First time I have heard someone complaining about high oil pressure.....
Sounds abot right for a fresh enging with new bearings and HPR 50.
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Old 07-22-2004, 01:45   #7 (permalink)
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Re: oil pressure of new engines

Dont forget, because only the oil pump is turning, the oil pressure will be higher because the rotating assemblies are sitting stationary.... their rotation reduces the pressure at the bearings due to thin film effects.

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Old 07-22-2004, 02:11   #8 (permalink)
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Re: oil pressure of new engines

yeah i never thought of that, when its cranking its 70-75psi. The oil in it is a non friction modified running in oil. And it smells just like diff oil!
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Old 07-22-2004, 23:35   #9 (permalink)
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Re: oil pressure of new engines

Quote:
Originally Posted by qwikcorty
i hope to see what it is when its hot this weekend when i start it up.
Photos please, good luck with it qwikcorty
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Old 07-25-2004, 04:53   #10 (permalink)
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Re: oil pressure of new engines

i had the same sort of pressure with my rebuild and a drill,,Runs at 60-70 hot at revs and 45 idle hot

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