Oil Pressure

[jwebb]

Experiencing fluctuations in oil pressure, it moves from say 60 psi to 75 then to 50 all while engine running at virtually the same RPM. I replaced the sender but the problem still exists, any history with Speedhut gages having issues? The sender is mounted directly to the block through some brass plumbing..

[scottiec]

I would get rid of the the brass connection between the sender and block. They are prone to failure. Use something like this https://lmr.com/item/LRS-9278A/1979-89-Mustang-Oil-Pressure-Sending-Unit-Extension-50L?utm_source=google-shopping&utm_medium=comparison-shopping&utm_campaign=google-shopping-v2&adpos=1o5&scid=scplpLRS-9278A&sc_intid=LRS-9278A&gclid=EAIaIQobChMIu9Wo_rKN3QIVHbjACh0CrQDNEAQYBSAB EgL6bPD_BwE

Now, that doesn't necessarily solve your problem. You could have some debris in the oil passages that will cause a fluctuation in oil pressure. Is this a new motor? Mileage? Also, is this only at idle? Is it a standard volume pump or high volume?

Lastly, as the rpms rise, does oil pressure rise with it, or still jump around?

Sorry for all the questions. I would be tempted to drain the oil and cut open the filter to see if you have anything going on.

[GoDadGo]

Another option, if you have the room to spare, is to use an Oil Filter Sandwich adapter that is normally used to install an oil cooler like the one in the link shown below:

https://www.summitracing.com/parts/cvs-ocs64/overview/

I'm running this exact piece (Chevy Version) that I drilled and opened it up to flow oil through the piece to install my oil temperature sending unit and the piece can also be used for both the oil pressure as well since it has two ports.

You can see how it looks on my engine in the beginning of the attached video link; however, I have no clue how your clearance would be with the SBF set up since I'm from: The Dark Side!

https://youtu.be/-nVDzIjSjh8

Good Luck From The Dark Dart Side!

Steve

[GFX2043mtu]

My speed hut oil pressure gauge fluctuates at idle by as much as 10 psi, but when hooked up to a auto meter mechanical gauge the readings are as solid as a rock. I have tried various senders and have drawn the conclusion it’s probably the gauge doing it. You are not the only one with this problem.

[Dewey McBride]

My Speedhut Oil pressure gauge fluctuates with my RPMs. I've been told it's a common issue and as long as it's reading it's probably good. I'll look into it this winter.