[GTOGEORGE]

So I've been going crazier then normal trying to get my oil pressure where i want it (I've had my pan off 3 times. I changed my oil pump to the Butler Pro 60 psi pump and been fighting it for 3 days now. Its a GOOD pump thats not the problem it just differs from all the other pumps I've used specially the pump I just took out. Just trying to get good pressure at idle and 70 psi in the end. Its just crazy how different oil pumps can be that have the SAME cast housings and springs. Don't know how the guys without tube chassis /and or not a two piece old pan do it! Thank Gosh I have a hoist!


GTO George

[GTOGEORGE]

I'm about ready to go back to a Mellings pump!


GTO George

[wrench]

Cool story?

[RAIV-Z]

The Titan is adjustable and doesn't need a 2 piece pan, just put a plug in the side to adjust the pressure. You would need a modified pan in order to fit the pump in though.

[johnta1]

Butler Pro 60 psi pump

If it's a 60 PSI pump how would you get more than that out of it?

455 SD's were 80 PSI

[BruceWilkie]

Originally Posted by johnta1

If it's a 60 PSI pump how would you get more than that out of it?

455 SD's were 80 PSI

Change regulator spring or shim it or modify spring cap so you can make it adjustable.

[Tom Vaught]

Originally Posted by johnta1

If it's a 60 PSI pump how would you get more than that out of it?

455 SD's were 80 PSI

ONLY difference between the 60 psi oil pump and the 80 psi 455 SD oil pump is about $5.00
in two parts. A longer (higher pressure spring) and a longer spring housing.
Last time I bought the stuff from Melling The housing was about $2.00 and the Spring $3.00

Rest of the pump is IDENTICAL. Tom V.

[johnta1]

That's right, so why buy a 60 PSI (probably at more money) if you want 70 or more?



George just buy the good Melling pump and worry about other stuff.

[Steve C.]

This might be of interest:

http://www.luhnperformance.com/pontiac.html


A fwiw, I was recently told of a issue with a modified oil pump sold by Butler. And it was discussed with and confirmed by someone at Butler Performance.
I do not have specifics if it was their Pro pump model.


.

[Tom Vaught]

The Luhn Pump has a lot of pump features not found in your basic Melling Oil Pump stuff.
In George's case he probably is not spinning the pump high enough, Steve, to get into cavitation of the inlet but the other features are all really nice.

I have two of his modded pumps.

Tom V.

[johnta1]

Those look like a great pump, more volume and bigger intake pipe.

[Steve C.]

I did a edit on my previous post since for now I'm not sure if it was their Pro Pump in question. I do know a issue was acknowledged at Butler.

Tom, PM sent


.

[GTOGEORGE]

Originally Posted by johnta1

If it's a 60 PSI pump how would you get more than that out of it?

455 SD's were 80 PSI

Well the thing is I probably wasn't going to get 60psi out of their (Butler) pump.....maybe.......maybe 55, only had 45 at 3000rpm. Now with my Mellings 54d pump I had 70psi, if I'm not mistaken it came with an extra spring (purple), so I installed the spring.


GTO George

[GTOGEORGE]

Originally Posted by BruceWilkie

Change regulator spring or shim it or modify spring cap so you can make it adjustable.

Ive changed springs and also I've shimmed the spring (changed caps).....at one time i had 100psi with the same configuration I had in my mellings pump (purple spring)! The Butler pump comes with the same yellow spring thats in the mellings 60psi pump. So I took the mellings cap off and reinstalled the Bultler cap (one cap is deeper then the other), with the same purple spring that was in my mellings pump....now I'm only getting 45psi and that it. Just doesn't make sense psi should be at least 70?

GTO George

[Tom Vaught]

Originally Posted by GTOGEORGE

The Butler pump comes with the same yellow spring thats in the mellings 60psi pump. So I took the mellings cap off and reinstalled the Bultler cap (one cap is deeper then the other), with the same purple spring that was in my mellings pump....now I'm only getting 45psi and that it. Just doesn't make sense psi should be at least 70? GTO George

If you have the Deeper Cap (probably the stock Melling Pump Cap on the pump and the Butler cap is shallower (with the same spring to compensate for the smaller ball installed in the Butler Pumps so debris does not hang them open) you basically put even less preload on the spring so the pressure went even lower.

You should have shallow cover, smaller diameter ball, and purple spring stock from Butler.
Then if you add a spring washer shim to that set-up you should be able to bump the oil pressure up even a bit more.

Tom V.

[Gary H]

As you know, more to oil pressure than just the pump. Did you change bearings, or grind the crank? Also, if you want a little more psi, you can run a little heavier oil.

[johnta1]

The longer housing requires a longer spring.
The longer spring can be stronger because there is room for more coils.
About like valve coil spring installed height.
Also with a short spring in the longer housing it may not be doing anything?
(unless shimmed a lot for the extra length of housing)

[GTOGEORGE]

Originally Posted by Gary H

As you know, more to oil pressure than just the pump. Did you change bearings, or grind the crank? Also, if you want a little more psi, you can run a little heavier oil.

Nope, everything is the same except oil pump.


GTO George

[ponchjoe]

I don't normally hang around the race section but what about the Precision pumps?

http://stores.precisionoilpumps.com/pontiac/

[GTOGEORGE]

The purple spring for the melling pump is a 70 psi spring, the yellow is 60 and then you have the longer purple with its extended housing that's 80 psi. All cast oil pump housing are the same.



GTO GEORGE