Hi All,
Installed an aluminium housed high volume Oil Pump into a 2.0l Escort Engine.  After engine warmed up, idle 45psi, at 2000rpm 72psi and increases up to 98psi at 6000rpm.  Have tested with both analogue and digital gauges.  Any explanations for the 98psi at 6000rpm and any possible long term negatives.
 
Regards
John

I installed a high vol/pressure pump from burtons into my v6 and on start up will go straight to  about 100psi (top of gauge) and when warmed up will drop back to 80psi on idle, any driving will be at the full pressure.
I too wonder about the long term effects if any. On the plus side it will pull 6000rpm without anything going bang.

Johnscapris

Hi All,
Installed an aluminium housed high volume Oil Pump into a 2.0l Escort Engine.  After engine warmed up, idle 45psi, at 2000rpm 72psi and increases up to 98psi at 6000rpm.  Have tested with both analogue and digital gauges.  Any explanations for the 98psi at 6000rpm and any possible long term negatives.

Regards
John

Installing high volume pumps on Pintos that don't need it (or any engine for that matter) is the single biggest mistake I see people make when building an engine.  The pumps that burtons supply are a massive issue, I have seen a number of these people have fitted that have excessive pressure also.
 
Almost 100psi is far to much oil pressure.  It will cause you issues if it hasn't already.  Around 60psi max is what I aim for on a Pinto.
 
If you have a Burton pump, remove it and throw it as far as you can over your shoulder.  If your engine doesn't require a high volume oil pump, don't fit one.  In most instances they are not required.  The standard (not high volume) off the shelf Mellings pump is ample.  Make sure the hex shaft is in good condition, and you refit the locating dowell, otherwise it will break the shaft.
 
Cheers
Woz

I agree, usually if fitting a high pressure oil pump it is usually wise to increase the size of the sump for extra capacity as the oil is being sucked up much faster and if you are going around corners you may find the pickup gets temporarily starved due to oil surge in the pan.  I have just built a reasonably warm pinto and my oil pressure with the standard pump is 60 psi.  Mates hot jobbie with high compression and roller top end does 9000 rpm on standard pump.
 
Cheers,
 
Len

Wozzah, what will happen in a motor with excessive oil pressure?  Is it just a case of blowing out rubber seals?  Obviously the additional pressure = parasitic power loss but are there other side effects?
 
Does a high pressure oil pump actually materially increase flow?  Isn't the additional pressure achieved by putting a stronger (or shimmed) pressure release spring in it so that it by-passes at a higher pressure?  The rotors are the same size as a standard pump?
 
Sorry, more questions than answers from me :(

MK1_Oz

Wozzah, what will happen in a motor with excessive oil pressure?  Is it just a case of blowing out rubber seals?  Obviously the additional pressure = parasitic power loss but are there other side effects?

Does a high pressure oil pump actually materially increase flow?  Isn't the additional pressure achieved by putting a stronger (or shimmed) pressure release spring in it so that it by-passes at a higher pressure?  The rotors are the same size as a standard pump?

Sorry, more questions than answers from me :(

 
Additionally to what you mentioned (seals, drivehsaft load etc) usually at constant high RPM it will fill the rocker cover up with oil and run the rest of the engine dry.
 
Yes, to achieve higher PRESSURE (not volume) with an otherwise std pump will require shimming or respringing the relief valve.  Understand that there is a clear difference between a high VOLUME pump and a higher PRESSURE pump.
 
Higher pressure doesn't neccessarily mean more flow, but generally I would think it would be the case.
 
As for the differences in the pump vanes, I have never made a direct comparison side by side on the bench.
 
I believe the issue with the pump in question here was to do with the location of the relief valve hole (would have to confirm that with a mate).  I never bother pulling them apart, they all go in my scrap bin when i remove them.  Is a common issue with the brand pump here.
 
Cheers
Warren
P.S.  Havent forgotten about your main caps, just havent been back to the farm in recent times.  Long story, but I will get them to you.