STD Tuning Engine Oil pressure... How much would be too much?

Oil pressure... How much would be too much?

Oil pressure... How much would be too much?

 
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300D50
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775
06-21-2011, 12:10 AM #1
Anyone know the safe upper limit on oil pressure with a 617?

What would blow first if she hit 200+ PSI?
I've heard rumors that it's not good to run too high a PSI on the mains and rods, but never any hard facts as to why, just the standard "it'll blow out seals".
I'm assuming the seals in the IP would be the first thing that would get ornery, but are there any other rubber seals in these engines that might be affected?

I'm asking because when I remade the back of the oil pump to relocate the pickup, I was unable to include the stock pressure relief valve in the new design.
This was in part because the old pickup/rear plate was cast aluminum and used some rather expensive non-standard tooling in its original manufacture.

I'm also having trouble finding an external adjustable regulator in my price range, hence asking what the max the engine can take is. My plan is to possibly run the pump without a regulator, and deal with the possibility of a 200PSI spike at WOT.

Assuming a quasi-linear relation of oil pressure to RPM, 100 PSI at 3K RPM would be ~ 180 PSI at 5400 RPM.

Right now I'm not worried about hoses or filters or the like, those can be dealt with when the time comes.

In case you don't know, engine is a 617.912 that's getting the rotating assembly and valvetrain from a 617.95x engine.


1990 Power Ram 50 V6 SOHC 24V 6g72

I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
300D50
06-21-2011, 12:10 AM #1

Anyone know the safe upper limit on oil pressure with a 617?

What would blow first if she hit 200+ PSI?
I've heard rumors that it's not good to run too high a PSI on the mains and rods, but never any hard facts as to why, just the standard "it'll blow out seals".
I'm assuming the seals in the IP would be the first thing that would get ornery, but are there any other rubber seals in these engines that might be affected?

I'm asking because when I remade the back of the oil pump to relocate the pickup, I was unable to include the stock pressure relief valve in the new design.
This was in part because the old pickup/rear plate was cast aluminum and used some rather expensive non-standard tooling in its original manufacture.

I'm also having trouble finding an external adjustable regulator in my price range, hence asking what the max the engine can take is. My plan is to possibly run the pump without a regulator, and deal with the possibility of a 200PSI spike at WOT.

Assuming a quasi-linear relation of oil pressure to RPM, 100 PSI at 3K RPM would be ~ 180 PSI at 5400 RPM.

Right now I'm not worried about hoses or filters or the like, those can be dealt with when the time comes.

In case you don't know, engine is a 617.912 that's getting the rotating assembly and valvetrain from a 617.95x engine.


1990 Power Ram 50 V6 SOHC 24V 6g72

I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.

 
  • 0 Vote(s) - 0 Average

Messages In This Thread
Oil pressure... How much would be too much? - by 300D50 - 06-21-2011, 12:10 AM
RE: Oil pressure... How much would be too much? - by Captain America - 06-21-2011, 03:32 PM
RE: Oil pressure... How much would be too much? - by 300D50 - 06-21-2011, 04:25 PM
RE: Oil pressure... How much would be too much? - by Captain America - 06-21-2011, 04:52 PM
RE: Oil pressure... How much would be too much? - by 300D50 - 06-21-2011, 05:45 PM
RE: Oil pressure... How much would be too much? - by Biohazard - 06-21-2011, 06:49 PM
RE: Oil pressure... How much would be too much? - by 300D50 - 06-21-2011, 07:17 PM
RE: Oil pressure... How much would be too much? - by dieselboy - 06-21-2011, 07:56 PM
RE: Oil pressure... How much would be too much? - by Captain America - 06-21-2011, 10:43 PM
RE: Oil pressure... How much would be too much? - by led-panzer - 06-21-2011, 11:02 PM
RE: Oil pressure... How much would be too much? - by Captain America - 06-22-2011, 04:02 PM
RE: Oil pressure... How much would be too much? - by 300D50 - 06-21-2011, 08:16 PM
RE: Oil pressure... How much would be too much? - by yankneck696 - 06-22-2011, 05:08 AM
RE: Oil pressure... How much would be too much? - by 300D50 - 06-23-2011, 08:34 AM
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