thirdgenbum

iTrader: (17)

i'm about to buy my oil pump for the new 6.0L build and i don't have a clue which to go with. i can get the melling for about 40$ less than the ported ls6 pump, but i can't seem to get a straight answer on which one is better? the ported ls6 pump in question would be a TSP unit.

thanks for any input!

Shawn @ VA Speed

iTrader: (3)

i run a stock ls6 pump on most builds-sometimes a ported ls6 and only use the melling for real high rpm stuff.

getsum27

ive heard the hv pumps will suck the pan dry at high rpm's
i had a buddy kill a h/c/i ls1 a while back and he swears it was the oil pump pumping too much volume
he said he will never use anything but a stock ls6 pump again

thirdgenbum

iTrader: (17)

so shawn that sounds like to me that you like the melling for all out situations where you don't want a failure...and if i can get that one cheaper than the ls6 pump, seems like i i might be better off with the melling.

any cons to the melling? cost more HP to turn it or anything?

edit: i just saw your post, yikes, it dried the pan?

Shawn @ VA Speed

iTrader: (3)

forgot to add in my first post-i only use the melling pump with an aftermarket pan.usually the moroso pan.they can suck the pan dry like said above.the stock ls6 pump works extremly well for most street applications

thirdgenbum

iTrader: (17)

so should i get a stock unit from a dealership, or go with a ported unit?

ae13291

iTrader: (8)

why is it that i hear all these pan gets sucked dry stories after i got my HV pump. anyways i paid 105 bucks shipped from lingenfelter.com for a high volume oil pump, 30% more flow and stock and high psi spring and o rings included

99blancoSS

iTrader: (115)

We run the HV with the normal pressure spring installed, I offer them already clearanced for a double roller

cookba

iTrader: (10)

Chris, by using the normal pressure spring that should stop the pan from being sucked dry right?

IFRYRCE

iTrader: (3)

You're not the only one, I just opened it three hours ago!

Still, I spun a bearing at 7k on the stock ls1 pump and I keep my engines a half quart over. I doubt I'll be regretting the decision since I already had 1 oil-related failure.

If oil is like boost(and I know they're not I'll get there in a second), pressure (PSI) and volume (CFM, or quarts/min I guess in oil terms) are only somewhat related. It's because its a high volume oil pump that it starves the pan, not because of the higher pressure spring. Am I wrong in assuming that? Except they're NOT alike, oil isn't compressible and air is. Someone help me out here please.

Monte4ever

iTrader: (2)

The Melling 10296 HV pump only increases volume by 18%, so its not that much over stock. IFRYRCE you are right, volume sucks the pan dry not pressure.

Beau@SDPC

iTrader: (14)

it is alot more volume over stock really. and pressure and volume are not related. if you change the spring to the stock one, then it will only open up faster to short circuit the pump and not change the volume characteristics much at all

JPH

iTrader: (2)

Melling #10296 w/blue spring installed with the correct amount of oil in the pan and be done.

thirdgenbum

iTrader: (17)

i picked up a killer deal on a TSP ported and shimmed pump. should be here soon.

Justin93

iTrader: (7)

I've run both melling and tsp. My current motor has the Melling HV with a stock oil pan. however I also run a 6.0 truck filter which is bigger and an extra quart of oil and daily drive the hell out of the car all spring summer and fall and no problems. My tsp gave me no problems but had to ditch it in the new motor because it was packed with metal shavings from a lifter knocking my Cam out.

cals400ex

iTrader: (27)

i believe the melling 10295 is a stock volume pump with a slight increase in pressure. it is just another option.

Red99TA

iTrader: (11)

As mentioned the pressure isn't related to the volumetric flowrate in this case considering that our oil pumps are basically positive displacement pumps which means they pump the same volume regardless of pressure. A ported oil pump simply reduces the flow restrictions in the inlet/outlet of the pump to make it easier to pump the oil thus saving you 0.01 HP

Beau@SDPC

iTrader: (14)

^^ honestly though, if they didnt work somewhat well, they would not sell and people would not put extra effort into hand porting them.

thewholefnshow1

iTrader: (2)

Look at my sigs and I just run a stock ls6 oil pump and have no problem. My tuner say he doesn't like the ported ones and he's seen more problems out of a ported ls6 pump and hardly ever has a problem out of the stock ls6 pump.

01ssreda4

iTrader: (96)

Im running the Melling M295 and it works great. I have watched it with a mechanical pressure gauge. Its about $105 from advance auto. Its a Melling stock replacement pump.