|
|
06-27-2009
What is the stock oil pressure on these motors at idle? I just installed a gauge and its reading just under 70 psi at idle, sounds really high to me to be honest. I'm just wondering if I did something wrong or thats how it should be. As far as I know I installed the gauge and sending unit correctly.
Originally Posted by TLSheff
06-27-2009
its fine, you need 60 psi at 1850 rpm. higher is fine.
06-27-2009
60 at 1850? ..why?
10 psi for every 1000 rpm is the rule.
06-27-2009
the 3800 is designed for higher pressure, the general rule does not equate to OEM sorry bio
06-27-2009
ive never had high pressure with my car, even with the l36.
06-27-2009
same oil pump?
06-27-2009
off topic... sorry... ideal fuel pressure is ____?
06-27-2009
It's really that high stock, wow. My old 89 2.8 Camaro ran at like 30 at idle. Figured 60 would be real high rpms or something was wrong.
Originally Posted by TLSheff
06-27-2009
these use different pumps than the older 60 degree v6's they run higher pressure.
07-01-2009
BIO is right that you need an average of 10 psi per evert 1k rpm. That is indeed on the low end a good engine should see definitely more psi than that. I know lack of oil psi in these engines can cause them to tick.
That oil psi figure you gave is that in the helms manual (I'll have to check mine). The lowest oil psi I've seen in my gtp was 28.5 psi and that was in 95 F heat and towing with the gtp while sitting at a light. I always see 65-75 psi on startup and crusing on the road I sit at around 65 psi.
To the op, the 70 psi at initial startup is fine, as the viscosity of the oil is thicker and will cause the higher psi. As the oil warms up the oil flows easier causing your oil psi to drop.
Last edited by JJ91284; 07-01-2009 at 01:03 PM.
07-01-2009
The ideal fuel pressure at idle is 45-50 psi. The oil pressure i normally see is 40 psi idle warmed up, As soon as i hit the gas the slightest bit, i see 60 psi, and when im gettin on it hard, 80-90psi. These engines run higher than other older engines, they use a different pump also. When in doubt, consult OEM.
07-02-2009
high oil pressure isnt necessarily good, either. just a thought.
07-02-2009
You are correct. It will cause bearing erosion. Since i do not have high oil pressure though, it's not a problem.
07-02-2009
That is what I was worried about at first. But since 60 psi is fine at idle then I'm not sweating it anymore. I'm just used to older cars with lower idle psi.
Originally Posted by TLSheff
07-02-2009
my low oil pressure just means there are no clogs in my system.
07-02-2009
weak pump or weak bypass spring or excessive oil clearances.
07-02-2009
My 170,000 mile Stock Long Block GTP idles between 55-60 psi.....
07-02-2009
I honestly think every car is a bit different so there really is no way to gauge it just by OEM specs IMO...you have different wear and tear so cars are going to vary...hell my old motor used to idle at 20 or so and run up to nearly 70 WOT...when cruising around 25-35...so it differentiates quite often...
07-03-2009
i see anywhere from 40-85 psi
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
