Anybody Running a High Volume Oil Pump?

[Rumble1960]

I'm just completing my engine and have been thinking if I should change the oil pump. I see there is a high volume gear type available for about the same price as a new stock rotor style. Has anyone here used a high volume pump and would recommend it over stock?

[dezeldoc]

Stock is just fine for it, these ain't no race motors.

[martybose]

I don't think there is much need for a high volume pump. As many of you know, my oiling system was modified to eliminate the stock crossover pipe by going external from the pump, through a full flow filter and an external oil pressure valve, and putting oil back into the hole that used to have the pressure relief valve (after blocking off some extra holes in the block). When I first fired up this motor I was getting over 100 pounds of pressure at a fast idle, measured at the standard location at the back of the oil galley. I quickly turned down the external regulator, thereby bypassing more oil back into the oil pan, and now see 50-60 pounds of pressure while driving and hot, and a worse case of15-20 pounds hot at idle using 15w-40 oil.

So the stock pump has plenty of volume for our application.

Marty

Edited July 23, 2009 by martybose
added oil weight info

[glasspacks]

Interesting reading about oil pumps guys thank you. Question; What would cause my oil pressure to go from 45 PSI to 15 PSI between drives. Drove ithome at 45,... started it today it's 15 MAX. Oil pressure control valve on the pump is clean and moves freely. Any suggestion as to where to start diagnoses. By the way a replacement pump for my 54 Dodge 230 is 150.00 up here in Canada.

Cheers,

glasspacks.

[martybose]

If you've got a oil pressure relief valve on the pump, I'm assuming yours is a HyDrive-equipped car, since most cars like this have the valve in the block. You say it moves freely, but did you take the spring out and check it? You could have broken the spring, which would have the effect you mention.

You want to be careful about replacement pumps, since none of them have this valve; you would have to change the cover plate to make it correct.

Other than that, I can't think of anything short of rather catastrophic that would cause a sudden drop.

Marty

[glasspacks]

Marty,...Shel,.... thank you both for your replies. I am about to delve into the oil mystery,..... and of course what ever I find I will post back to you.

Cheers,

glasspacks

Vancouver Island