Oil pressure question

Oct 28, 2015
47
20
8
Québec,Canada
New rebuilt engine New GM stock oil pump ,stock original cover,45-50 cold start And 20-25hot,whit VR1 10w30,main bearing clearance 002-0022,for the rod around 0021-0022 I whant to raise the pressure what is the Best solution??go whit 20w50,power plate...because at idle is Not bad...20,. in overdrive maybe 60mph I have around 45lb I have a autometer electric gauge Not a lot of précision whit That....
 

CS99

Member
Nov 21, 2002
650
22
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No reason to raise your idle oil pressure. Just change your bypass spring to the yellow one. Also no need to run 20/50.

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CS99

Member
Nov 21, 2002
650
22
18
The bypass spring will give you more pressure at full throttle

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Oct 28, 2015
47
20
8
Québec,Canada
Thanks cs99 I Will Check the color of the spring in My oil pump ,,maybe my engine builder put the wrong spring in it???I hope is juste thatThats Not à big problème to change the spring,I think melling have theme maybe GM?
 

CS99

Member
Nov 21, 2002
650
22
18
Yes. TA performance also has them. You can also just put 1/8 shim between cap and spring also. I have a yellow spring and still had to shim it

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Oct 28, 2015
47
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Québec,Canada
Thanks cs99I Will Check at TA website And my auto parts to find That..before I Will go to the garage to remove the spring ...to see the color,I hope is juste That
 

Turbo6inKY

Short Guy
Jun 18, 2001
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blog.andrewdscott.com
New rebuilt engine New GM stock oil pump ,stock original cover,45-50 cold start And 20-25hot,whit VR1 10w30,main bearing clearance 002-0022,for the rod around 0021-0022 I whant to raise the pressure what is the Best solution??go whit 20w50,power plate...because at idle is Not bad...20,. in overdrive maybe 60mph I have around 45lb I have a autometer electric gauge Not a lot of précision whit That....
Those pressures are fine. You don't need to change anything unless it doesn't make it to ~60PSI under WOT at the top of each gear.
 
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SFI Cutlass

Active Member
Jan 2, 2010
306
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I’m running the same oil as you are and have the same results I’m at 20psi warmed up. I was running the mobile 1 15/50 and at idle I was at 30 psi. I switched to the vr1 10/30 to try it and the engine warms up sooner, pressure still good under acceleration and I feel like my turbo spools quicker. I personally think the mobile1 was to thick for a car that is not raced and is just a street car.
 
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Oct 28, 2015
47
20
8
Québec,Canada
I find TA performance sell oil pump adjusteble spring I think I Will try That...anyway I have to remove my spring to Check for the color,whit adjusteble I Will set the pressure I whant...I hope ‍♂I Need 10-15 more pound a WOT because 45-50 is low don't whant to ruine the bearing
 

earlbrown

runs with scissors
May 26, 2001
7,002
1,231
113
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lagrange, GA
If the spring is already the yellow one, just add a small washer in there to shim it a litte more


And if youre wanting huge numbers on your oil pressure gauge, you need to take it back to the buider and tell him to fix those loose clearances and build it right
 
Oct 28, 2015
47
20
8
Québec,Canada
If the spring is already the yellow one, just add a small washer in there to shim it a litte more


And if youre wanting huge numbers on your oil pressure gauge, you need to take it back to the buider and tell him to fix those loose clearances and build it right
Thanks sir,I Will try That,I juste whant acceptable oil pressure at WOT,I know it loose à Bit but I have a good idle pressure so I hope to fix that ,first I will check the spring color...I don't whant 80pound but juste to be to the safe side60 If possible and I Will be Happy Thanks!
 

earlbrown

runs with scissors
May 26, 2001
7,002
1,231
113
47
lagrange, GA
I have a feeling your oil pump is already jacked up. You've got too much at idle on that loose ass engine to be low up top.

But, like you said in your original post, you don't trust your oil pressure gauge. Many people have been led down the wrong rabbit hold when they didn't now when to not trust their tools.


You asked for the best solution to fix oil pressure issues.... flip the engine upside down, remove the oil pan, and put in a set of bearings that will fix the clearances.
 
Oct 28, 2015
47
20
8
Québec,Canada
I have a feeling your oil pump is already jacked up. You've got too much at idle on that loose ass engine to be low up top.

But, like you said in your original post, you don't trust your oil pressure gauge. Many people have been led down the wrong rabbit hold when they didn't now when to not trust their tools.


You asked for the best solution to fix oil pressure issues.... flip the engine upside down, remove the oil pan, and put in a set of bearings that will fix the clearances.
Thats no a good feeling MrBrownI will go whit elimination,,,I hope I will not to remove the engine I put a lot of time to make that engine bay show car...hope...
 

earlbrown

runs with scissors
May 26, 2001
7,002
1,231
113
47
lagrange, GA
I guess it just depends on what you want out of the car and it's engine. If you're only worried about how it looks, leave it be.

If you want your engine to be in spec and last, there's only one way to fix the bearing clearances......
 
Oct 28, 2015
47
20
8
Québec,Canada
I guess it just depends on what you want out of the car and it's engine. If you're only worried about how it looks, leave it be.

If you want your engine to be in spec and last, there's only one way to fix the bearing clearances......[/QUO I talk to the engine builder before the rebuilt And tell him to no go to loose ....I have to deal whit that problems now.I have all the winter to think,,,,but before remove the engine I will check that's spring and test whit thick oil
 
Oct 28, 2015
47
20
8
Québec,Canada
Check what color spring is in the bypass. Sounds like you may have a orange spring. If that’s the case change it to a yellow spring.

Don’t pull your motor for nothing.
Thanks TurboRick I will start to check the spring first and do some testing after to raise if possible the pressure my engine is a little loose but other member her have the clearance whit no pressure problème
Check what color spring is in the bypass. Sounds like you may have a orange spring. If that’s the case change it to a yellow spring.

Don’t pull your motor for nothing.
thanks turboRick first thing I will check the spring,other member her have the same clearance whit good Wot oil pressure...and no I dont whant to pull motor a this time Idle pressure is good thanks
 

earlbrown

runs with scissors
May 26, 2001
7,002
1,231
113
47
lagrange, GA
Wrong spring (black)....I put a TA ajustable spring et voila‍♂At cold start whit 10w30 I have 60-65 hot 20-25 ,the clearence is not the probleme Happy now

You need thinner oil now.


Either that or you're running the wrong spring and have it jacked up with that TA external preload adjuster.
 
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