Author Topic: Mechanical oil pressure gauge install question??  (Read 6380 times)

Reply #30January 16, 2009, 12:28:05 pm

zukgod1

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Mechanical oil pressure gauge install question??
« Reply #30 on: January 16, 2009, 12:28:05 pm »
I haven't checked my psi at the filter but at the head @ 3000rpm I'm getting 38-42 depending on the temp.

Last time it was apart I took the relief valve apart and added a stiffer spring, problem is I add new main/ rod bearings (again) at the same time so I cant tell ya if I actually received an increase in pressure.

I'm also running a bypass system that I built, pulls off the second port back on the flange and returns to the plate on the front of the engine.
I used a brass nipple about 2" long and silflossed one end shut then drilled a small hole to regulate flow. My first hole was 1/8" and that was way to large so I re-welded it up and drilled a smaller hole, cant remember at the moment exactly what size :(
dan

99 Golf TDI (now CNG powered) , 82 TD Caddy

Reply #31January 16, 2009, 12:40:08 pm

arb

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Mechanical oil pressure gauge install question??
« Reply #31 on: January 16, 2009, 12:40:08 pm »
Quote

as for increasing pressure, would this kit work on a vw???  


It is possible to have too much oil pressure. You'll wash away your crank bearings. In the early 1980's one of my first jobs was at Federal Mogul's research lab in Ann Arbor. I did tests on bearings where we simulated too much oil pressure. The test would eat through the bearing material to the steel backing plate in a few days. It was called "Capillary erosion".

Reply #32January 16, 2009, 12:46:34 pm

zukgod1

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Mechanical oil pressure gauge install question??
« Reply #32 on: January 16, 2009, 12:46:34 pm »
what pressures where you running to get that result?
dan

99 Golf TDI (now CNG powered) , 82 TD Caddy

Reply #33January 16, 2009, 01:32:44 pm

arb

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Mechanical oil pressure gauge install question??
« Reply #33 on: January 16, 2009, 01:32:44 pm »
Quote from: "zukgod1"
what pressures where you running to get that result?


LOL ! I knew that was an obvious question. I do not recall what the pressure was. Thinking about the test machine, it was nothing out of sight. Since our mechanical gauges top out at 100 psi, I would imagine you would not want pressure near that level.

Reply #34January 16, 2009, 02:55:53 pm

zukgod1

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Mechanical oil pressure gauge install question??
« Reply #34 on: January 16, 2009, 02:55:53 pm »
Well that probably doesn't cross over to our cars then.

In stock form we get 100 psi on start up and run 60 psi consistently so...
dan

99 Golf TDI (now CNG powered) , 82 TD Caddy