oil pump

[Mr_Efficiency]

I'm planning on turboing my 2.8 and I heard some people havving issues with the stock oil pump and turbo set ups, so i figured just to be on the safe side i'd upgrade the oil pump.

Is there any other GM pumps that will bolt in place of the 2.8 pump and pump more volume? like a 3900 pump or something?

Also is there any kind of spring or something inside the pump i could shim a bit to gain a bit of pressure?
thanks

[86euro]

You can just buy a high-volume pump for a 2.8

[Mr_Efficiency]

from where/who?

[geoffinbc]

Just buy a stock late model pump. It will supply more than enough volume to satisfy the engine and then some. Running an overly high volume just wastes horsepower, creates heat in the oil and bypasses more oil introducing air into it.

[gpse3400]

Rockauto should carry an HV HP pump but like BTY said, be sure you actually need it, as i may drie upo the oil pan. FYI Turbo 3.1 GrandPrixs used an HV HP pump so It might benefit you...

[Mr_Efficiency]

Just buy a stock late model pump.

So you mean a pump from a 3400 car? would that bolt right up to my 2.8? how much more pressure does it have over stock 2.8 pump?

FYI Turbo 3.1 GrandPrixs used an HV HP pump

I doubt my parts store would sell a TGP pump but thanks for the info, I heard guys having problems turboing a N/A motor with TGP parts, thats why i was asking.

thanks

[3100 MPFI]

I bought a high volumn oil pump for a 3100 from Autozone back when I worked for them. When they look it up, you can ask for it.

[Mr_Efficiency]

will a gen 3 pump work in a gen 2 motor tho?

[geoffinbc]

Yup it should work just fine. But I am not sure if you will have to swap the pickup or not. Or maybe it doesn't come with one I am not sure.

[Mr_Efficiency]

I'll figure it out, as long as the pump itself bolts up I'll be fine. thanks guys

[3100 MPFI]

I think you have to use the GEN 2 pickup seeing that the oil pans are totally different. There was probably a design change.

The 3100 oil pump has a 3/4" inlet (part number 2244152)
The 3.1 normal oil pump has a 5/8" inlet (part number 224414
The 3.1 TURBO oil pump has a 5/8" inlet (part number 2244148V)

It looks like if you get the 3.1 high volumn oil pump, then you need the same pick for it, but when I was looking at the 3100 oil pumps, they DO list a HIGH VOLUMN one for it. The part number is 2244152v

[geoffinbc]

I would go for the larger pickup over a HV pump if possible. Every stock pump on a good motor without excessive wear will always hit bypass around 3000 rpm so whats the point of going high volume? All you will do is make problems. Turbos do not require much volume anyway. Look at the lines that go to them they are usually -4 lines. Hell my worn out Trooper still hits bypass by 3000RPM and it has 176,000 hard miles. And I know the bearings are bad because the bearings tick a bit at hot idle. So if an old ass pump is still kicking out the volume whats the problem, why would people want to change it?

A large pickup will help reduce parasitic drag on the pump. How much? well not much but everything helps. If it is going to be too hard to install a 3/4" pickup on a gen II motor then I would just get the stock pump.

FYI to make a small block survive a constant 7000RPM all that is required is a stock pump with a 3/4" pickup. This comes from Smokey Yunick Power Secrets.

[davida1_hiwaay_net]

I used a Melling HV pump from Auto Zone for my turbo iron-head 3.1. Makes about 300 HP and has run 100,000 miles with no oiling issues. Does have an oil cooler in radiator, however.

The HV pump will add heat and use HP, BUT the turbo will add so much more heat that the little bit from the HV pump will be insignificant. I had to install a radiator from a diesel car with a built-in oil cooler to keep oil temps down.

Go for it with the turbo! You will never look back.
David

[Mr_Efficiency]

I'd rather put the high volume pump in now instead of doing what a friend of mine went through on the w body forums and even with a new pump he had low pressure and had to drop the pan and put a high volume pump in.

a high volume pump cant hurt me at all, and i'd rather be safe than sorry and have to do this twice. plus i have a pretty monster oil cooler out of an rx7 i belive, that should take care of the heating issues.

[davida1_hiwaay_net]

I'm with you on that! The cooler will take care of any temp issues, and beleive me the turbo will MORE than make up for the HP oil pump power usage. :-)