LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Oil pressure normal operating range?

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Old 05-27-2007, 02:30 PM
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Oil pressure normal operating range?

Will im searching for my other problem i realise that my oil pressure is really high on my gauge(stock one).

When i start it,i get around 412 wich is excatly in the middle between the 275mark and the 550 mark

When it get worm the oil pressure would stay around 275 right in the middle of the gauge.

My last motor never reach those number.

Right now im running some 5w30 castrol mineral oil for my break in.I also got a new sending unit.

Is it good or bad ?

Last edited by always faster; 05-27-2007 at 02:36 PM.
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Old 05-27-2007, 03:13 PM
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Oil pressure on a stock one should be between 0-50PSI.
On a built engine it is whatever ya set it at but NOT 275PSI.
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Old 05-27-2007, 03:31 PM
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Originally Posted by 1racerdude
Oil pressure on a stock one should be between 0-50PSI.
On a built engine it is whatever ya set it at but NOT 275PSI.
Is the stock gauge graduate in psi? Man im runnig right between the 275 mark and the 550 mark.It seem impossible
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Old 05-27-2007, 06:05 PM
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Originally Posted by always faster
Is the stock gauge graduate in psi? Man im runnig right between the 275 mark and the 550 mark.It seem impossible
Should be in PSI.
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Old 05-28-2007, 07:12 AM
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How the hell could the stock gauge be in psi.Normal people got around 60 psi when its cold and around 20psi when its hot.

If the stock gauge is in psi i would have over 275 psi off oil pressure in my motor...That doesnt make sens
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Old 05-28-2007, 07:33 AM
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Originally Posted by always faster
How the hell could the stock gauge be in psi.Normal people got around 60 psi when its cold and around 20psi when its hot.

If the stock gauge is in psi i would have over 275 psi off oil pressure in my motor...That doesnt make sens
are you sure its in PSI.....not kpa or something like that? You close to canada?
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Old 05-28-2007, 07:41 AM
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Originally Posted by mdacton
are you sure its in PSI.....not kpa or something like that? You close to canada?
Exactly was i was trying to say in my bad english(sorry).The stock gauge is graduate like this= 0(start)-275(middle)-550(end)


There is no way that i would have over 400psi of oil pressure in my car

Yeah im from Quebec,Canada
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Old 05-28-2007, 07:47 AM
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I would say your goood then....about half way. seems o.k.


maybe find a conversion chart......rule of thumb is 10 psi per thousand rpm's

6000 rpm= 60psi

hope that helps, Good day canadian
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Old 05-28-2007, 07:51 AM
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Originally Posted by mdacton
I would say your goood then....about half way. seems o.k.


maybe find a conversion chart......rule of thumb is 10 psi per thousand rpm's

6000 rpm= 60psi

hope that helps, Good day canadian
Yeah i just found a pictures of a US cluster and yours are already graduate in psi,lucky for you : (start)0-(middle)40-(end)80

So mine is in KPA.

10 KPA = 1.4503773773020922 PSI

So when cold my 412 KPA = 59.7555479448462 PSI
And when hot my 275KPA = 39.885377875807535 PSI

So my car is perfect.

Thank you for you help
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Old 05-28-2007, 07:52 AM
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PSI = 0.145038 X kPa


Looks like he's good

412kPa is 59.755656
275kPa is 39.88545

Last edited by aboatguy; 05-28-2007 at 07:56 AM.
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Old 05-28-2007, 07:58 AM
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Dayumm beat by a minute
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Old 05-28-2007, 07:59 AM
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Originally Posted by aboatguy
Dayumm beat by a minute

Lol thanks for double checking my numbers.

Look like my oil pressure is good
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