printmanjackson

iTrader: (1)

The subject of oil pumps came up in a conversation the other day about the difference in these two pumps. Is it true that the LS6 pump is larger and pumps slightly more volume?

F8L GTO

I would like info on this as well. Ive heard the LS6 pump is more efficient

Nemesis350

iTrader: (11)

It would be great for some knowledgeable members to talk a lil about this. In addition, I'm also curious to know if ls6 pump is more liable, or if it's best to just find an aftermarket brand pump thats ported for more volume.

02*C5

iTrader: (1)

The '97-'00 model LS1 pumps had an o-ring that was known to fail. The '01-'04 model LS1s, they redesigned and upgraded some parts... the LS1 pump from the '01-'02 F bodies is the exact same one that is on the LS6 engine and is a far superior version compared to the earlier LS1. The LS1 oil pump is good for stock applications period once you start going to a new cam, lifters and so on you need to upgrade to a ported LS6. Why ported because you will have more volume and this will make sure you don't run out of oil to your different bearings specially in higher rpm range.

Now I went with a Melling product. They have better gears, o rings and the over all design is better. They are pretty much bullet proof not saying they do not fail everything fails. Yet the Melling product has shown itself to perform over and over again. I am sure there are many people who vouch for either the LS6 ported or Melling. what it comes down to is preference.

Some people will also chime in and talk about oil starvation with more volume being pumped through your engine but I am running a M296 High pressure and 18% more volume. This pump is on my second H/C package and am currently running it with a 150 shot shifting at 6800 rpm and i have yet to see any sump starvation or anything to the fact.

Hope this helps.

printmanjackson

iTrader: (1)

I'm sorry 02*C5 but I'm not looking for an opinion on other pumps compaired to LS6 pumps, but facts as to the difference in a LS1 vs LS6 pump.

It has been said to me that the LS6 pump is larger and pumps more volume.

Is this true and what is the difference?

MikeG

iTrader: (33)

There ya go...

02*C5

iTrader: (1)

reading comprehension

printmanjackson

iTrader: (1)

so starting on '01 all LS1 engines had the same oil pump? So there is no such thing as an LS1 oil pump, they are all LS6 pumps?

printmanjackson

iTrader: (1)

sorry but I'm confused with your statement

"The LS1 oil pump is good for stock applications period once you start going to a new cam, lifters and so on you need to upgrade to a ported LS6."

are they the same or not?

Jim_PA

iTrader: (9)

Aren't high pressure/high volume pumps for turbos or motors running loose bearing tolerances???

Ported/high-volume (whatever) seems like a bit of snake oil to me on a modern tight engine without a turbo or some real need for the high pressure/volume.

02*C5

iTrader: (1)

Yes you will need more oil going to the new equipment. Even though these engines are tight and some people might think is snake oil as posted by some here, anything bigger than a stock cam is putting a lot more pressure and demand on oil to the bearings, specially when you are spinning your engine anything past stock.(6200 LS1/ 6500 ZO6) That's why many engine builders highly suggest going to a ported LS6 for more oil volume after a H/C package. Now the higher volume and pressure pumps come with different options of pick up o rings which help for your needs, me if your engine is over a 100K like my self and or your running some type of FI like my self or you have a combination of both like myself I would highly suggest the M296. Other than that stick with either a ported LS6 or a M295 (stock replacement) Melling product.

After a 100K miles tolerances start to loosen up hence the engine is no longer tight. LS engines are notorious for eating oil and once they get after 100K stock pistons and rings they tend to eat about 1/2 to 1 quart depending on the load its under per oil change so I would check your oil every week or so and add as needed and leave the snake oil at the door.

p.s. i shift mine at 6800 and redline @ 7K my tps/ws is set to 6600.

printmanjackson

iTrader: (1)

I found this thread in the archives from a couple years ago.

https://ls1tech.com/forums/generatio...-oil-pump.html

02*C5

iTrader: (1)

great info on that thread and it also gets into the 10296. Again every little helps when you are going with anything other than stock equipment. Springs, pick up O rings and porting all go into giving you more or better flow.

What r u doing to ur car if u don't mind me asking. (Mods)

Jim_PA

iTrader: (9)

Good info indeed. The one element that is repeated several times is that high volume/pressure isn't needed. If you're bearing tolerances are getting out of spec, you should look at fixing the problem.

printmanjackson

iTrader: (1)

makes you wonder why so many people think the LS engine needs so much oil pressure.

02*C5

iTrader: (1)

You are right and I agree 100 percent but the number one thing that keeps me from doing so is laziness. I am one that I know that one of three things need to happen for me to break the motor apart to do this. Either I spun a bearing, blew the motor, or am about to do a stroker. You do not find too many people that will take their engine apart do bearings all over and then put it back to stock. Sometimes funds also play a roll in this. This is a major over haul and why invest so much money to put ur engine back to stock.

Again I think your right but you won't find too many guys that will do this me included.

speedtigger

iTrader: (16)

Man, reading that thread was painful. Guys were asking the same questions that Jason already answered over and over again.

Jeff Smith

iTrader: (44)

^^^^^^^ Good post here ...

Detoxx03

iTrader: (14)

Sounds like another thread i'm reading

Cobra4B

iTrader: (9)

2001+ All cars got the LS6 shortblock, oil pump, intake manifold, exhaust manifolds, etc. The differences between a 2001+ LS1 and LS6 are the heads (243 vs. 241s), the cam profile, and the PCV system setup.

Personally I run LS4 high volume pumps in my cars becaue they're road raced and have to handle an oil cooler and oil temps in the 270 range.