Oil Pressure Range

[Lunatic]

Before installing my supercharger and running 20 weight oil I would see oil pressure on a hot engine scary low. 220 degree oil temp, 3 lbs oil pressure at idle.
When getting tuned for the supercharger I had my tuner raise my idle RPM from 750 to 950. Now my oil pressure never drops below 20 psi at idle.
This is with 5-30 oil.

[HotlavaFRSGT86]

Originally Posted by Lunatic

Before installing my supercharger and running 20 weight oil I would see oil pressure on a hot engine scary low. 220 degree oil temp, 3 lbs oil pressure at idle.
When getting tuned for the supercharger I had my tuner raise my idle RPM from 750 to 950. Now my oil pressure never drops below 20 psi at idle.
This is with 5-30 oil.

Wow yours really dipped to 3lbs warm? Shit mine only dips to about 8lbs at idle, runs about 120-125 cold and 40-60 psi under normal driving conditions warmed up.

[Lunatic]

Originally Posted by HotlavaFRSGT86

Wow yours really dipped to 3lbs warm? Shit mine only dips to about 8lbs at idle, runs about 120-125 cold and 40-60 psi under normal driving conditions warmed up.

Toyota specs call for 7 psi @ 172 degrees at idle. So you know oil pressure will go lower as engine warms up.

[SoCalArgento]

Does anyone know if it's normal for for oil pressure gauge needle to flutter +- 1-2 psi during highway cruising or right after off throttle? I recently installed a Defi gauge with pressure sender attached to top of block by AC unit. Doesn't seem to be leaking or anything.
This is first time using an oil pressure gauge.

In regards to oil pressure I'm running 0w20 with pressures around or slightly below 10psi at around 185 F and around 40-47psi highway at 190F.


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[Surok]

i came to this thread because i saw like 8psi at 500rpm.. i was like :O

I have the billet oil pump gear too, to defend against it breaking the stock item.

[Lunatic]

I solved my low idle oil pressure by raising my idle rpm from 750 to 900 rpm. Now idle oil pressure stays above 20 psi.

[humfrz]

Originally Posted by Lunatic

I solved my low idle oil pressure by raising my idle rpm from 750 to 900 rpm. Now idle oil pressure stays above 20 psi.

Did you post this just to see if we were payen attention .....??




humfrz

[Lunatic]

Originally Posted by humfrz

Did you post this just to see if we were payen attention .....??




humfrz

Yup! Ya caught me.

[humfrz]

Originally Posted by Lunatic

Yup! Ya caught me.

Yep, raising the idle will increase the oil pressure ...... most of the time ....... cept on splash oiled type, lawn mower engines .....


humfrz

[Lunatic]

Actually all kidding aside I raised the idle rpm because seeing 3 and 4 psi oil pressure at idle with a hot engine bothered me. I feel better seeing 20 psi now.

[humfrz]

Originally Posted by Lunatic

Actually all kidding aside I raised the idle rpm because seeing 3 and 4 psi oil pressure at idle with a hot engine bothered me. I feel better seeing 20 psi now.

Yep, 20 psi is a much more comfortable number to see.

However, that reading of 3-4 psi just may have been beyond or at the limit of detection for your instrument and the pressure was actually 7-9 psi ....... jest tryen to make you feel better .....


humfrz

[Lunatic]

Originally Posted by humfrz

Yep, 20 psi is a much more comfortable number to see.

However, that reading of 3-4 psi just may have been beyond or at the limit of detection for your instrument and the pressure was actually 7-9 psi ....... jest tryen to make you feel better .....


humfrz

Very possible, I'm just using an old school mechanical gauge. But it read pretty close to the Toyota specs of 7 psi @ 172 degrees, and being in southern CA. my oil temp reads 200 most of the time I knew it had to be lower than 7 psi. So yes, now I feel better with more oil pressure. An easy fix for me. I wish the top end pressure drop was as easy to fix.

[Ultramaroon]

Originally Posted by Lunatic

Very possible, I'm just using an old school mechanical gauge. But it read pretty close to the Toyota specs of 7 psi @ 172 degrees, and being in southern CA. my oil temp reads 200 most of the time I knew it had to be lower than 7 psi. So yes, now I feel better with more oil pressure. An easy fix for me. I wish the top end pressure drop was as easy to fix.

Get a big fucking oil cooler. I can hook you up with a bill of material for my setup but finding a diverter valve might be the tricky part. You wouldn't need it unless you daily yours.

I can maintain my engine oil temp below 190 F for an unlimited duty cycle. I cut back on the flow when I'm cruising.

http://www.improvedracing.com/setrab...ler-p-247.html

[Tcoat]

Originally Posted by Ultramaroon

Get a big fucking oil cooler. I can hook you up with a bill of material for my setup but finding a diverter valve might be the tricky part. You wouldn't need it unless you daily yours.

I can maintain my engine oil temp below 190 F for an unlimited duty cycle. I cut back on the flow when I'm cruising.

http://www.improvedracing.com/setrab...ler-p-247.html