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Oil pressure at idle

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Old Mar 6, 2017 | 02:30 PM
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Default Oil pressure at idle

I want to know what people see for oil pressure at idle. I have a 418CI stroker LS3 with twin turbos. I get 30-32 pounds of oil pressure at 220 degrees.

Someone told me at a car meet an LS should never be below 42PSI. Even before I had my big motor I never saw 40 at idle.

Yes I am running the stock pump.
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Old Mar 6, 2017 | 02:55 PM
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My brand new Silverado barely has 30psi at idle. You are fine.
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Old Mar 6, 2017 | 07:25 PM
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A lot of people get 20-25 at an idle when hot. Yours seems good.
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Old Mar 6, 2017 | 07:46 PM
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Originally Posted by svslow
My brand new Silverad5o barely has 30psi at idle. You are fine.
I hope your dod is turned off.
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Old Mar 6, 2017 | 07:47 PM
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Originally Posted by hillshooter
I want to know what people see for oil pressure at idle. I have a 418CI stroker LS3 with twin turbos. I get 30-32 pounds of oil pressure at 220 degrees.

Someone told me at a car meet an LS should never be below 42PSI. Even before I had my big motor I never saw 40 at idle.

Yes I am running the stock pump.
Your fine.
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Old Mar 7, 2017 | 06:41 AM
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"Someone told me at a car meet"-yikes
That stuff always scares me, lol-I would be worried about 220 degrees, although things get hot under the hood. I run somewhere in the 30's, stock ported pump with a spacer under the spring. I run 10/30 oil, but not syn.
They used to say 10 PSI per 1000 RPM, as long as pressure is rising and not falling off with RPM.
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Old Mar 7, 2017 | 08:46 AM
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years ago I would trust "what someone told me at a swap meet" over "what someone on the internet said"

funny but now the opposite is true.
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Old Mar 7, 2017 | 09:41 AM
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Originally Posted by forcd ind
"Someone told me at a car meet"-yikes
That stuff always scares me, lol-I would be worried about 220 degrees, although things get hot under the hood. I run somewhere in the 30's, stock ported pump with a spacer under the spring. I run 10/30 oil, but not syn.
They used to say 10 PSI per 1000 RPM, as long as pressure is rising and not falling off with RPM.
220* oil temps after a good long pull are normal. I would worry about that at all.
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Old Mar 7, 2017 | 11:00 AM
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Originally Posted by forcd ind
"Someone told me at a car meet"-yikes
That stuff always scares me, lol-I would be worried about 220 degrees, although things get hot under the hood. I run somewhere in the 30's, stock ported pump with a spacer under the spring. I run 10/30 oil, but not syn.
They used to say 10 PSI per 1000 RPM, as long as pressure is rising and not falling off with RPM.
220 for me is everyday driving. I get way more than that making pulls in the summer. I shut it down when it gets over 240.
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Old Mar 7, 2017 | 01:13 PM
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There's no problem with the oil pressure, but you do need to address your cooling system!
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Old Mar 8, 2017 | 08:59 AM
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There's no problem with the oil pressure, but you do need to address your cooling system!
Like others have said, that advice is pure baloney. If you as GM directly they say around 10psi per 1000rpm minimum. Now that's a bit extreme, but I wouldn't be worried at all if my oil pressure was at 20 at idle if it went up with RPMs. Up top is where it really matters not at idle where there's almost no load on the engine and bearings.

But as far as cooling, I don't think it's an issue as some of you pointed out. 220* oil temps are perfectly fine, heck I wouldn't want them to get much cooler than that anyway. Oil is designed to work and perform its best at or around 212*...so any less is not really desirable especially if you're beating on the engine.

If your oil was getting into the 270* range I'd start to worry about extra cooling. 220* is perfectly fine.
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Old Mar 8, 2017 | 01:28 PM
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My motor is 3 1/2 years old and since day one after some heat is in it sometimes I'll see pressure at 27-28 psi idling hot
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Old Mar 9, 2017 | 01:38 AM
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I get around 48 hot at idle
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Old Mar 9, 2017 | 12:57 PM
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When my cooling system wasn't keeping up I was seeing around 20psi oil pressure when hot.
The heat bothered me, the "low" oil pressure not so much
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