Oil pressure question
 

Hey guys.

I installed an innovative oil pressure guage on my car. I used the port on my skunk sandwich plate to install the sender. When I started the car the guage read 40psi at idle. It jumped rapidly to 100psi, the max pressure the guage reads, at 3000rpm. I am assuming this means the sender is no good, but I wanted to check with you guys before I contacted innovative for a replacement. No leaks or anything silly like that. Oil lines are 8an Aeroquip socketless. Core is a mocal laminova.

Woot

Was the car cold?

Stuck there? Even after it warmed up?

Car was cold. Didn't leave it running for too long. I have an oil temp guage as well. I guess I'll let it idel until the oil gets up to temp and confirm?

Allegedly, cold start oil pressure is well over 100 psi. You may just be looking at the top end of that gauge. I think I remember seeing a similar post last summer.

Sandwich plate at the filter? Cold oil? That's normal. The pressures are real high there.

Really? How high do they get? The sender for my pressure gauge is too big to fit in the oil gallery location. If the pressure is over 100psi at the sandwich plate all the time I have no idea how to make the guage work in any helpful manner.

It's only high when it's cold. I think @BatStig means you're measuring oil pressure upstream of the oil filter but either upstream or down, it will be above 100 PSI when it's stone cold. Modern-day precision manufacturing.

Ok. Helpful as always my good man. Thanks.

Took the car out for a spin. Got the water temp up to 200F. Oil was warm as well (of course). Saw 20psi at idel and 70psi at 3000rpm. Still seems high to me.... Is that about right? Or could I have an issue with my sender?

from what element tuning has cermized, you want 70ish psi all the way until redline. any lower than that and youll run into starvation issues.

I don't think you can have 70psi from 1k to 7k. Element is also pulling well over 1g on racing slicks.

I have read ideal oil pressure is 10psi per 1000rpm. That should put you at just under 10psi at idle and 70psi at redline. But ultimately I don't know.

Yeah, that's ballpark. No worries. Remember, you're measuring upstream of your filter. It'll read a bit higher.

Baby, when i drive you, there is peace on earth
I set out to thrash you with good oil pressure
I was racing inside, I am a thresher (<- poetic license?)

You do somethin' to me, the oil pressures droppin'
Rev me higher and I feel no pain
Every beat of my engine, we got somethin' jus' sayin'

Racing fast is blind, it requires a dedication
Honest racing, we feel, needs no conversation
And we race together, uh huh
Makin' laps with each other, uh huh

Oil pressure measured up stream, that is too high
No pressure drop between, how can we be wrong
Race away with me, to another track
And we rely on oil pressure, uh huh
From one bearing to another, uh huh


With apologies to Kenny Rogers & Dolly Parton.