I just finished my cam install and i added the Melling 10296 oil pump... all i have to say is

cold idle 60psi
warm idle 50-55psi

i have not taken the car past 4k since i just put new springs in today.. but my stock ls1 oil pump was about 40 on cold idle and 28-35 on warm idle.... so i think this thing works...

 

Melling is known for their pumps.

Glad it's working good for you!

 

Finally someone has some feedback on it. Myself and others have posted up asking if anyone has used it yet and what their thoughts were on it as compared to a ported/shimmed pump from TSP or some place of the likes. No one ever had anything to contribute. Gald you like it and can provide some good feedback.

 

I did a reply on mine a while back... 70psi cold and 60+psi hot...

 

I have one going into the shortblock I am building up right now. I'll post feedback when I can. They come highly recommended from a guy I trust who does a lot of LS motor work.

 

hey 2001 pewuter ws6, was that shimmed or std?

 

They are awesome we use them almost exclusively rather than going with the ported LS6 pumps like everyone else does.

 

Only problem that I could think of you could run into with a pump like this is it sucking your pan dry at high RPM. But maybe thats just all in my head.

 

I think a Melling pump might help a lot of the "tickers" out there!

You can bet that's what I'll be putting in my new engine.

 

I have a melling in my '98 and I love it.

Like stated above I have about 60psi on cold starts and around 50 at warm starts. And at WOT I get around 70psi or so.

 

I wonder if they have a spring that would do 45-50 cold and 30-35 warm idling? Would that be the stock spring I could use from the stock pump? I dont think I need 60psi idling..............or do I???

 

You don't NEED 60 at idle but it certainly doesn't hurt.

 

Pressure is one thing, Volume is another. I would worry about that in road racing applications possibly only with HIGH VOLUME pumps.

 

Looking at Melling's website I see they make two models - 10295 (higher pressure) & 10296 (more volume). Which one is preferred?
Where to purchase?

 

You don't necessarily need more volume, but added pressure is usually what the folks go for in aftermarket applications. Of course, more volume is a bonus as well, it's just finding a medium in both which it looks like the high volume pump does according to InsaneKamel's reported increase in pressure.

 

Anytime you increase the volume, you will get an increase in pressure. You can not pump more oil through the same clearances and not have an increase in pressure. Usually a high pressure pump uses a stock volume pump with a higher pressure bypass spring; whereas a high volume pump will use a larger pump with larger gears in order to move more oil. In the case of the high pressure/stock volume pump the pressure will not usually be affected at idle because the pump is usually not pumping enough oil to exceed the pressure being regulated by the bypass spring, hoever as the rpms increase and the pump speed increase the volume of oil increases up until it exceeds the pressure being regulated by the spring. So basically if you put a lower pressure spring in the high volume pump it would not necesarily drop your pressure at idle unless you put a spring in so low that it was bleeding off pressure down low as well but then it would not build pressure as the rpms increased.

 

As far as where to purchase the melling pump you can purchase them with summit, they sell melling pumps.

 

Thunder Racing sells the Melling oil pumps. I use them almost exclusively in all my GEN III shortblocks.

http://thunderracing.com/catalog/?ac...&vid=3&pcid=83

 

I just installed one in my new engine. I havent got it started yet to check pressure.
I am wondering why there is no gasket where the pump mates to the block. Its hard to belive that metal to metal surfaces under that kind of presure wont leak.

 

I use a little bit of RTV to seal it up against the block.