I hooked a manual oil pressure gauge up to my rebuilt motor and I get 75lbs of pressure when cold. Someon on here said that sounds like too much? Is this ok? I thought the more the marrier...
how much oil pressure you get?
- Thread starter beaver2489
- Start date
jaidedeye
Member
most 5.0 guys would love that much pressure. the only thing you gotta think about - remember that with too much pressure, the bypass kicks in. so one has to make sure they are not bypassing the filter.........i asked a few weeks ago, what pressure a stocker bypasses at, and did not find out. i need to research it.
ninety15.0
New Member
- Mar 10, 2004
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No i think thats fine...i would love to have all that pressure all the time. when mine is cold i probly get like 60-65 but once it gets warm and im not driving it hard it goes WAY down. I dont know if its just the guage but it pisses me off. Anyways, it takes a couple minutes for the oil pressure to even give an accurate reading when the car is just started up cold. What does it read when cruising and accelerating? i think ur fine! good luck with it
ya, with the stock gauge thats in the dash...mine sits at the second line. with the mechanical guage it reads 65-75lbs. The stock dash gauges suck ass IMO.
stangbear427
Active Member
Heh! about 50psi cold, 12psi warmed up at idle. 30psi warmed up cruising, any rpm. 232,000 miles, never rebuilt, no smoke no leaks. Oh yeah- 75psi is fine for a cold engine. As long as you aren't one of those people who starts it cold when it's 20 degrees out and immediately takes off blasting up the road, you'll be fine. Just give it a minute to circulate. What's it put out warmed up cruising? That's the one that matters more.
Legendary
Founding Member
I get 65 when cold and around 40 when at idle (lower when hotter outside). It goes to 50 when driving.
_jb_
New Member
According to the OEM guage, I get about 60 psi at startup, and usually between 20-50 when driving, depending on the RPM.
powershift351
New Member
It depends on the weight of oil you use. My friend has a drag car that runs 20w50. If it is cold out, he puts out more than 100 psi. Motor has been raced for 10 years. Worst thing that has happened to it was a dropped valve.
another idea: pressure can be indicitive of resistance. this can equate to a lack of flowing well, like someone running 50 weight SAE in 40* ambient temps will have more pressure than someone running 5W-30. however, the person running the latter will be flowing the oil more efficiently, albeit showing less pressure.beaver2489 said:
what weight of oil are you running in your fresh mill? if it is something viscous, you could likely step down to a thinner oil and still have adequate pressure, while flowing better when cold (assuming you are running thicker oil right now).
two cents worth of my two-cent thoughts. good luck.
its a synthetic blen made by havoline, the lowest I've seen it drop so far is like around 50 and that was with the motor pretty warm.
stangbear427
Active Member
89MustangGX
I have nothing productive to add!
I guess 75 would be ok for a cold engine on initial startup, as long as it drops afterwards -- but driving around with it stuck on 75 all day (like I thought you meant initially) I would be concerned.
powershift351
New Member
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