Average oil pressures

glasswars · Post by **glasswars** » Fri Sep 04, 2009 12:09 pm

Just curious to hear from others about your average oil pressures.

When I first start the car I will idle between 50-60 psi.
After driving for about 10 minutes idle pressure is about 30 psi.
After driving for a longer period of time, but with no heavy traffic and maintaining good speeds, I idle around 20 psi.
Cruising anywhere between 30-45 I am between 35-50 psi.
Cruising 50-60 usually around 50 psi.
60+ goes from 50 psi and up.

After driving for a while from point to point, or getting stuck at lights or in traffic I've gone as low as 10 psi, which I can assume is bad. This is the lowest I've ever gotten and at that point managed to get back up to a high speed cruise, so that I could cool down and oil pressure could rise again.

Don't recall any of my WOT pressures.. will have to do a run tonight and check it out.

Post by **occasional demons** » Fri Sep 04, 2009 12:38 pm

I have never installed a gauge on mine, so IDK. Throttle position (manifold pressure) should have no direct effect on oil pressure, as the pump relies only on rpm/clearances to build pressure, and the relief valve to regulate max. pressure. Of course temperature, and worn components can negate the need for the relief valve.

As a general rule of thumb, it should be 10 psi for every 1000 rpm. So 10 psi at 700 to 800 rpm is within the acceptable range. (hot)

But being used to Chrysler's higher oil pressure over the years, 10 psi would make me nervous too. (maybe that's why I don't have a gauge) Higher than really needed pressure causes more parasitic drag, which uses more fuel. Thus I wonder how much they have lowered the "norm". My old 2.2 would carry 60 psi at idle. Cold starts hit the peg.

glasswars · Post by **glasswars** » Sat Sep 05, 2009 12:05 am

Good info..

Just got back from a WOT run, held 60-70 psi. Didn't go above 6.5k though, so I guess it would be a little more for 7+k rpm.

asanti · Post by **asanti** » Wed Sep 23, 2009 2:24 pm

Granted this was in a N/A application, but my pressures were around 55PSI at startup, and go to 20-25PSI at warm idle. During WOT runs (RPM's running from 6.5K to 7.2K) it would sit at 68-72PSI. I typically drove at 75-85mph on the highway and it would sit at right around 62-65PSI normally. Hope that helps you.

Later
Allex

esteinmaier · Post by **esteinmaier** » Wed Sep 23, 2009 5:16 pm

I cold start around 40, dropping to 25ish at high idle, and 60 at 2000rpm+.

GunmetalNeon · Post by **GunmetalNeon** » Wed Sep 23, 2009 8:18 pm

If you raise your idle like 2000 rpms the oil pressure will go up but your idle tune will be off. Mine runs about that low it should be fine. The reason it's going down is because of the idle surging, right?

glasswars · Post by **glasswars** » Wed Sep 23, 2009 8:27 pm

Do you mean 200 rpm? Lol 2000 rpms would be a bit much. What do you mean about the idle surging?

GunmetalNeon · Post by **GunmetalNeon** » Wed Sep 23, 2009 9:00 pm

Yeah I meant 200rpms lol. Doesn't your car surge? Meaning that the idle floats about 300 rpms back and forth and sounds like it's got crazy cams. Another decent way to up the oil pressure is running 10W40 instead of 5W30. Thats what I run.

glasswars · Post by **glasswars** » Wed Sep 23, 2009 9:04 pm

It does, but only on the original start, not after it warms up. I usually find my self playing with the idle stop screw pretty often. And 10w40, really? I'll keep that in mind. Thanks man.

ZeroChad · Post by **ZeroChad** » Wed Sep 23, 2009 9:07 pm

I'm using a Melling oil pump. I'm not sure if its high volume or not.

Initial startup idle: 55psi
Warm idle: 35psi
2k rpm warm: 50psi
6k rpm warm: 70-80ish I think

glasswars · Post by **glasswars** » Wed Sep 23, 2009 9:13 pm

Hm, that does seem like a little more pressure than mine. A lot more at idle. Where'd you get yours?

ZeroChad · Post by **ZeroChad** » Thu Sep 24, 2009 12:04 am

I actually found it new on ebay from some guy parting out his planned build. I think it cost me like $15 shipped.

Moparty08 · Post by **Moparty08** » Fri Sep 25, 2009 3:17 am

I posted a suggestion up on the faq's but nothing yet. I suggested they should have some info like the oil pressure and battery voltage and such. Keep checking there also if they ever make anything out of my suggestion.

DoubtedNeon · Post by **DoubtedNeon** » Fri Sep 25, 2009 10:00 am

ive hit about 100 with mine, startup and shifting at about 4k, but i think my guage is off.

Post by **racer12306** » Fri Sep 25, 2009 10:30 am

I'd go with 10w30 first since it has less VIIs than 5w30 and 10w40.

10w30 should be a little more stable that 5w30 or 10w40.

Passt · Post by **Passt** » Fri Sep 25, 2009 11:42 am

I cold start at around 80, and once it's warm at idle its around 38-40. WOT is back up at 80.

darthroush · Post by **darthroush** » Tue Oct 20, 2009 4:21 pm

racer12306 wrote: 10w30 should be a little more stable that 5w30 or 10w40.

What about shearing?

bone-yard-racing · Post by **bone-yard-racing** » Tue Oct 20, 2009 6:15 pm

glasswars wrote:It does, but only on the original start, not after it warms up. I usually find my self playing with the idle stop screw pretty often. And 10w40, really? I'll keep that in mind. Thanks man.

NO NO NO BAD IDEA! If need be I can dig out an old pic of a cam from a car that aside from using 40wt oil was very well loved, both the cam and the interior surface of the cam towers were galled as if they had been starved for oil(they had not)

The engineers settled on a final 30wt oil for a reason

BlackRoseRacing · Post by **BlackRoseRacing** » Fri Nov 20, 2009 6:48 pm

sorry for the bring back from th dead....
On a stock pump hot at an idle you should be atleast at 20psi at an idle without a turbo. With a turbo installed you are going to lose oil pressure due to the extra demand. If you require thicker than 5-30 on a 2.0 you have got problems. The 2.0 was built pretty tight to run 5-20 stock.....

Post by **racer12306** » Fri Nov 20, 2009 7:26 pm

darthroush wrote:
racer12306 wrote: 10w30 should be a little more stable that 5w30 or 10w40.
What about shearing?

More stable = less shearing

2GN.ORG

Average oil pressures

Average oil pressures

Re: Average oil pressures