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Which oil pump? (SLP) LS6 or high volume

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Old Dec 23, 2007 | 12:01 PM
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Default Which oil pump? (SLP) LS6 or high volume

I need a new oil pump for my LS1 blower boosted rebuild .
I was told to get a ZO6 pump.
I found out there is two different pumps and part #'s
One is the ZO6 pump and the other is the GM high volume pump,

I am not sure which one is better or which one to use.

I trust SLP but for $180 i think that too much $.

What pump and part # is SLP using?
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Old Dec 23, 2007 | 12:21 PM
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SLP uses a Melling 10295 (unconfirmed) that is machined for double row timing chain.

If your going to use double row chain get an SLP, if your using a single row chain go with a melling 10296.

we have both in stock.
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Old Dec 24, 2007 | 01:39 PM
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Melling #10296 pump is the one to go with, but like frasier said, timing sets are an issue now with pump housing clearance.
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Old Dec 24, 2007 | 06:17 PM
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OK I think i will just go for the SLP since i will be running a roll-master double roller timing set, and Yes it looks like a Melling with the part # grinded out and replaced with a SLP stamp and serial #

But can anyone tell me whats the diference between the melling 10295 and the 10296 pump
thank you for your help.
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Old Dec 24, 2007 | 06:27 PM
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Your 100% correct...

I've verified it.

I ONLY use the Melling 10295 or 10296. (Preferrably 10296)
Originally Posted by Fraser@SpeedInc
SLP uses a Melling 10295 (unconfirmed) that is machined for double row timing chain.

If your going to use double row chain get an SLP, if your using a single row chain go with a melling 10296.

we have both in stock.
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Old Dec 24, 2007 | 07:11 PM
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The 10296 is high pressure and 18% more volume
the 10295 is just more pressure

can the 10296 be machined to fit and work with the roll-master double roller timing chain set up?
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Old Dec 24, 2007 | 09:29 PM
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I run the SLP on my car

what most people do with 10296 is use pump shims, clearance bolt heads on the timing cover. Saw someone replace the pump cover bolts with button head screws to gain clearance.

I'm sure you could just grind a spot in the oil pickup on a 10296 pump and clear a double row, like what slp does.
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Old Dec 24, 2007 | 09:42 PM
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I just bought the 10296 and I am porting it myself. I figure I saved $75.00 off of Thunder Racing porting charge. A good Dremel Tool and a little time works wonders, even though this pump is fairly smooth inside.
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Old Dec 30, 2007 | 02:18 PM
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Originally Posted by Fraser@SpeedInc
I run the SLP on my car

what most people do with 10296 is use pump shims, clearance bolt heads on the timing cover. Saw someone replace the pump cover bolts with button head screws to gain clearance.

I'm sure you could just grind a spot in the oil pickup on a 10296 pump and clear a double row, like what slp does.
the new melling #10296 pumps have a notch in the castings now for a double row chain, but I haven't tried one just yet to sey how much it clears. The new casting pumps are blackish/dark gray in color also.
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Old Dec 30, 2007 | 06:36 PM
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I use a 10296 melling and its awesome... 70+psi at cold startup and 50-60psi at warm idle. High pressure spring installed.
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Old Dec 30, 2007 | 06:51 PM
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Originally Posted by JPH
the new melling #10296 pumps have a notch in the castings now for a double row chain, but I haven't tried one just yet to sey how much it clears. The new casting pumps are blackish/dark gray in color also.
You are correct.

Appears my last stock order was 1/2 dark grey ones
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Old Dec 30, 2007 | 07:11 PM
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Ya, now I dont have to do as much grinding on them.
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Old Dec 31, 2007 | 10:41 AM
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Originally Posted by Fraser@SpeedInc
You are correct.

Appears my last stock order was 1/2 dark grey ones
cool. sell the black ones for dbl. row chains and the older ones for single row chains.
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Old Dec 31, 2007 | 11:42 AM
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Originally Posted by VH5150
I use a 10296 melling and its awesome... 70+psi at cold startup and 50-60psi at warm idle. High pressure spring installed.
Why??..... If an LS1 makes 40PSI, it has more pressure than it will ever need. Any more is just wasted HP and excessive wear and tear on the pump. HV pumps are a complete waste of money in 99.8% of the applications out there IMHO.
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Old Dec 31, 2007 | 12:00 PM
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I have to agree with Hi Tech, except in a turbo/twin turbo application since it does need oil diverted from the mains to the turbos making a high volume appealing.
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Old Dec 31, 2007 | 01:43 PM
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the high pressure is from typically people using the optional spring

My oil pressure is 50 cold and 40-45 hot idle, used the standard relief spring.
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Old Jan 1, 2008 | 12:39 PM
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Originally Posted by Drew04GTO
I have to agree with Hi Tech, except in a turbo/twin turbo application since it does need oil diverted from the mains to the turbos making a high volume appealing.
Exactly.... and even then, it would be more so with non ball bearing turbos which require more oil to safely operate.

Last edited by HTMtrSprt; Jan 1, 2008 at 12:40 PM. Reason: spelling
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Old Jan 1, 2008 | 04:37 PM
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Originally Posted by HTMtrSprt
Why??..... If an LS1 makes 40PSI, it has more pressure than it will ever need. Any more is just wasted HP and excessive wear and tear on the pump. HV pumps are a complete waste of money in 99.8% of the applications out there IMHO.
Cause thats the way I wanted it... I had an oil pressure problem last time around and that will never happen again...
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Old Jan 7, 2008 | 11:02 AM
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Originally Posted by JPH
the new melling #10296 pumps have a notch in the castings now for a double row chain, but I haven't tried one just yet to sey how much it clears. The new casting pumps are blackish/dark gray in color also.
The dark cover melling pump Does NOT clear double row chain

used spacers and changed bolts to button head screws

Still its good oil pump

Last edited by Fraser@SpeedInc; Jan 7, 2008 at 11:11 AM.
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Old Jan 7, 2008 | 11:37 AM
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Originally Posted by Fraser@SpeedInc
The dark cover melling pump Does NOT clear double row chain

used spacers and changed bolts to button head screws

Still its good oil pump
that sucks. Thanks for the heads up Fraser, I sent a couple guys your way on a couple of those pumps.
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