high or low volume pumps

Camaro84 · #1 01-23-2006, 07:25 PM

I Have a new high volume pump but a few people said i should just put my old one in if i dont want to go get a new stock pump..... wat do u Guys Think

supervisor1886 · #2 01-23-2006, 08:43 PM

What kinda pump? Mechanical or electrical and for what application?

silicon212 · #3 01-24-2006, 02:04 AM

Quote:

Originally Posted by supervisor1886

What kinda pump? Mechanical or electrical and for what application?

You don't NEED a high-volume pump unless you're turning the engine above 6,000 RPMs, but in my case I went with one when I built my current engine in '93 and used a normal pressure relief spring. A quarter million miles later, it's still the bomb. Make sure that you use a stainless steel driveshaft if you use a high volume pump.

supervisor1886 · #4 01-24-2006, 11:22 PM

I wont agree with this. I prefer a high volume electric pump over a stock one simply because they are better and are more reliable to put out ideal fuel pressure. A nice fuel pressure regulator, and two pumps (one pushes the other delivers fuel), just like older bimmers do. No more crapy whining,or fuel stravation, etc.

RahX · #5 01-25-2006, 01:22 AM

i think this is about oil pumps?

silicon212 · #6 01-25-2006, 01:51 AM

Quote:

Originally Posted by supervisor1886

I wont agree with this. I prefer a high volume electric pump over a stock one simply because they are better and are more reliable to put out ideal fuel pressure. A nice fuel pressure regulator, and two pumps (one pushes the other delivers fuel), just like older bimmers do. No more crapy whining,or fuel stravation, etc.

I'm talking oil pumps here, not fuel pumps. If fuel pumps are the deal, then ...
Sorry, years of engine building.

corning_d3 · #7 01-25-2006, 03:43 AM

If you install a high volume pump, you may want to add an extra capacity oil pan, to prevent sucking the pan dry.. I'd hate to hit 5-6,000 RPM and have the pump suck air...

silicon212 · #8 01-25-2006, 11:06 AM

Quote:

Originally Posted by corning_d3

If you install a high volume pump, you may want to add an extra capacity oil pan, to prevent sucking the pan dry.. I'd hate to hit 5-6,000 RPM and have the pump suck air...

Good advice, especially on a higher-mileage engine with larger bearing clearances!

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