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Author Topic: Normal Oil Pressure?  (Read 4715 times)

Offline BlueCollarRon

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Normal Oil Pressure?
« on: January 24, 2009, 03:38:37 pm »
Whats up guys?  I would like to know, what is a normal reading for oil pressure?  I have a chev 350 (late 60's early 70's), I know it was rebuilt recently, but not sure how complete the rebuild was.  When I start my truck i have high oil pressure (70- 80) but once she starts idling nicely it stays from 35-40, when i hit the gas it jumps up 10-20 lbs.  Does this sound normal to you?  I plan to run this truck at high RPMs, so I would like to know if I am having any issues.  Thanks!
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Offline dumbucket1

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Re: Normal Oil Pressure?
« Reply #1 on: January 24, 2009, 04:09:33 pm »
sounds nice and healthy to me
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Offline 78 Chevyrado

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Re: Normal Oil Pressure?
« Reply #2 on: January 24, 2009, 04:22:37 pm »
sounds good
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Offline VileZambonie

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Re: Normal Oil Pressure?
« Reply #3 on: January 24, 2009, 05:50:34 pm »
Someone probably put in a high volume oil pump but your pressures are good.
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Offline joesgarage71

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Re: Normal Oil Pressure?
« Reply #4 on: January 24, 2009, 06:03:22 pm »
 Thats good pressure you have.
 10lbs for every 1000RPM.
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Offline friendlytruck

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Re: Normal Oil Pressure?
« Reply #5 on: January 24, 2009, 08:58:31 pm »
my truck runs at 40-60psi but there old oil gages from 1986 :-\
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Offline BlueCollarRon

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Re: Normal Oil Pressure?
« Reply #6 on: January 24, 2009, 09:52:21 pm »
Thanks for the reply guys.  If 10lbs per 1k rpm is normal, then shouldnt I only be reading 25 lbs at 2.5 rpms?   Or is it 10lbs per 1k  on top of the normal 40lbs?

Thanks fellas!
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Offline friendlytruck

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Re: Normal Oil Pressure?
« Reply #7 on: January 25, 2009, 01:17:10 am »
your welcome not much help though ps. my GM is a 350 V-8
« Last Edit: January 27, 2009, 07:02:46 pm by friendlytruck »
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Offline Irish_Alley

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Re: Normal Oil Pressure?
« Reply #8 on: January 25, 2009, 04:10:06 am »
i know with mine she will run about 40-50 at first start up then once she warms up she drops to 15-20. just be happy your not at 5 when you warm up, thats "blue oval bad"
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Offline joesgarage71

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Re: Normal Oil Pressure?
« Reply #9 on: January 25, 2009, 09:21:31 am »
 Just as a rule of thumb 10lbs for every 1000RPM
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78' K-20 355/SM465/twin stick 205 6" on 36's
14 bolt FF/big bearing Dana 44 4.56 gears
92' GMC C-1500 454/4L80E/14 bolt
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