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High oil pressure?
#1
Oil pressure query/concerns:
I’ve recently acquired a 1934 EB65. The engine was replaced in 1954 by Cambridge Engineering. Engine number is 212402. (Dec 1934) 
Vince Leek fully rebuilt this late 2000 which included Phoenix crank 15/16”, Taiwanese pistons and several other performance modifications.
It’s also reported the oil pump is modified, extended, bored by 1/32” and vane moved further off-centre. It has also been fitted with an oil filter (mini)
The previous custodian Ray Liddon passed away before he fitted a 0-20 psi oil gauge (shows he purchased one on one of the many receipts). The gauge it came with 0-10 psi & always depicts the reading off the scale. I believe it may have dropped to about 8psi on idle on a recent run.  Ive recently acquired a 0-20 gauge. When cold the needle is off the scale and comes down to about 8ish when warm (although this was just running in my drive for about 10-15 mins so perhaps not properly warmed up) reving the car and the gauge goes up like a rev counter to 18-20 psi (again in my drive after about 10-15 mins running). Is this pressure normal/to be expected for this type of oil pump mod?  Huh Huh
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#2
Yes, seems perfectly normal for the pump you describe and that spec engine. 10 - 15 minutes idling will not get the oil anything like properly warmed through.

Steve
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#3
Thank you Steve,
I’m used to a mag engined Chummy idling about 2 psi and high revs about 5psi.

Best wishes,
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#4
It's hard to say what the pressure should be without comparing an identical set-up, but my 3-bearing pressure fed engine typically run at 40-50 psi on the road and maybe 25-30 at idle. 

The last one I rebuilt with an increased offset pump was clocking 80 - 100psi at cold start.
(I maybe need to re-think the PRV...)
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#5
Overbored Austin oil pumps on splash fed usual run at 10lbs when warm and upto 25lbs cold don't over rev when cold. Terry

You can make an adjustable oil pressure relief valve from a std valve, the valve and spring on left is for a high pressure pump the ball and spring can be used with any pump with a std or stronger spring. Terry [attachment


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#6
Many thanks for this Terry,

Regards, 
Bonks.
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