Oil psi ??

Ty 1885

Ty 1885

Member
Noticed something on the way home from track, my oil psi was 40 at 3000rpm would not go higher when hot! Hot idle 20psi at 800 rpm.

When cold it goes 60psi, but hot 40psi, 20 idle. Mobile 1 10w30. Changed oil to 10w40 still same.


Dont remember what it was before the track. I guess its okay ???
 
G

gary sy

New member
Re: Oil psi ??

well i just checked it and it was cold and it was 75psi that is what it always is right around there. im guesing better lubrication right?
 
cloneman315

cloneman315

Active member
Re: Oil psi ??

Mercury Racing says engines only need 5 psi,you should see how low the turbo buicks run....
 
nallj92

nallj92

Active member
Re: Oil psi ??

as long as she is above 20psi warm, idling i would not worry. Main thing to look at is under load if the pressure rises normally, rises when revving etc. Can always pull the filter and cut it open to look for bearing fragments if you suffered a loss in PSI from before the track..
 
Six-is-Enough

Six-is-Enough

Use to do a little Boost
Re: Oil psi ??

nallj92 said:
as long as she is above 20psi warm, idling i would not worry. Main thing to look at is under load if the pressure rises normally, rises when revving etc. Can always pull the filter and cut it open to look for bearing fragments if you suffered a loss in PSI from before the track..
Click to expand...


Also you might want to change oil filter and brand of filter. Some have been known to collapse internally and restrict oil flow. In particular Fram oil filters. I like Napa Golds which are made by Wix.:2cents:
 
Don W.

Don W.

Stab it and steer it
Re: Oil psi ??

Assuming a real gauge, my :2cents: would be something is wrong. If running oil pressure used to be 60 and now it's 40 something happened. If it's always been 40 then I wouldn't worry as much. Normally I would want to see the oil pressure rise rapidly off idle to the set point of the pump relief. 60-65lbs commonly. I would consider 40 a minimum running pressure on my motor. I run 20-50 and have 40 hot at idle.

I was cutting filters regularly awhile back. Try this. Cut it open, (try NOT to use a hacksaw to cut it open. It will add metal to the can.) hacksaw the element at each end and set the element on some absorbent pads overnight. Next day or so you can examine the element very easily and see any metal that might be there.

Edit: After all the cutting I will buy only the real Wix if at all possible.

HTH
 
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T

turboj91

New member
Re: Oil psi ??

turbodig said:
Without going into it terribly deeply, no. It's just using power.
Click to expand...

I'm with Dig on both accounts. I'm not going into a long speech either and the using power thing.

I can say you are better off with volume than pressure.
 
Typhoon #2131

Typhoon #2131

SAVE THE TA-TAS
Re: Oil psi ??

mine runs 60 cold down the road and 40 at idle. Warm its about 50 down the road and 30 at idle. New motor with about 1000 miles on it.
 
bezerk

bezerk

New member
Re: Oil psi ??

stock gauge ain't something wonderfull..just a check to see if you got oilpressure.
all my build trucks got a aftermarket oilpressure gauge. they do 60psi cold and 50psi warm at idle
 
T

tydye

Banned
Re: Oil psi ??

bezerk said:
stock gauge ain't something wonderfull..just a check to see if you got oilpressure.
all my build trucks got a aftermarket oilpressure gauge. they do 60psi cold and 50psi warm at idle
Click to expand...

Ok so one shouldn't depend on the stock oil gauge at all? kinda like the boost, or is the stock good just to show some pressure at all?
 
bezerk

bezerk

New member
Re: Oil psi ??

tydye said:
Ok so one shouldn't depend on the stock oil gauge at all? kinda like the boost, or is the stock good just to show some pressure at all?
Click to expand...


80psi on stock is like 40psi IRL.
it''s cool if you just use it to see if there is a difference from day to day, but saying you got so much PSI. because the stockgauge says so...No..
 
Ty 1885

Ty 1885

Member
Re: Oil psi ??

Thanks guys, I played around with the oil sensor wires on the block, and its back to 40psi hot idle.
This is the six time that i had problems with oem harness( iac sensor went out every 6mos, map, tps, fuel pump wire only read 7volts) as soon as i ran NEW wires, the problems where gone. Maybe i have the first harness form China ?
 
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