Thoughts on MELLING HV OIL PUMP for 440
 

I am in the process of tearing down my worn 440 out of my Dad's 67 GTX. I took apart the original oil pump today and noticed that it is worn, and does not spin as freely as I would like-or I think it should.

I took at look on the web, and noticed that 440Source sells a Melling HV oil pump that is larger than the stocker. I like the thought of bumping the oil pressure up a bit in the fresh motor.

Anyone have any experience with this particular unit?

THANKS!
Erik

I do not have experience with that one, but I am looking to put in the Melling high volume one in my 440.

One thing to note is that there are 3 Melling makes for the 440, stock replacement, high volume, and high pressure. Each one is designated in the part number, M63 (standard pressure, and volume), M63HV (High volume, standard pressure), and M63HP (Standard volume, high pressure). So you have to decide want you want to do, I want a lot of oil to be flowing through to keep everything running smoothly, but you may be more interested in the higher pressure.

I hope this helps.

Forgot to mention, I believe that with the high volume one you can change out the spring inside it to make it also a high pressure one. But I am sure you saw the unit on 440source that lets you adjust the pressure while the engine is running. I am going to see if I can find a spring for the unit that will allow altering of the pressure, and see who offers a better option.

Good info Commando

I did see that adjust on the fly spring, that is pretty cool!

Anyone using this thing?

Erik

hi erik
kinda be afraid of the high pressure style pumps sometimes they create to much pressure and your seals can start leaking now my old man always went with a high volume pump still increased pressure just not as drastic
Terry

As you can see I like to do my research on different things when I can. So I could not find anything that had to do with the spring that melling has in there pumps that you can change, so I would say best bet would be to get that "adjustable oil pressure regulator" if you do need to adjust the pressure.

I am going to see if I will even need it as I think the higher volume should be good enough for my application.

Hey Terry,

You are correct that too much oil pressure can have negative affects on a motor. I have a lot of experience with the Gen III LS motors that GM is stuffing in all of there late model vettes, camaros, and firebirds and the case is the same with these motors as well. I figured that this may be a problem with the early Mopars as well when I got to thinking about it.

With that being said however, extra oil pressure at higher RPMs never hurt anybody either when adjusted correctly. I know that some even have the oil passages machined larger when rebuilding shortblocks...

I suppose a nice combo would be the larger pump, with the adjustable regulator.

Anyone out there know how much oil pressure is toooo much? I know I use to push about 70 PSI @ WOT in my LS1 SS Camaro...how bout these big blocks?

Thanks guyS!!

anyone else??? bump...

Sorry Erik cant say that i have used a mhv , all i do is run the hp from summit and have never had any complaints :D

Looked at the one I got yesterday, looks like high quality, and they have been around for awhile. The price is also good, and they are one of the only people making them, besides the high dollar ones you find on Summit.

Summit isn't that bad. Ever tried Year One?

I don't buy from Summit anymore, I just use them for the part number and then order them through my friend's store. From what I hear they're expensive.

they seem reasonable
but there are definetly cheaper options out there

thing about summit is i can usually have the parts within two days if not the next and i dont think they are a bad price at all for most items :D

agreed

Summit or Year one? I hear Year one is expensive, and the thing with Summit is that they are reasonable and then you add $12 handling, so it really depends on what you are buying and whether you are getting a deal to not pay a shipping charge.

Hey guys thanks for the replies. To comment on the most previous posts, I agree that any of the big name retailers can get you the items quickly. As a shop manager who places orders all day, I can tell you that Year One is awful. Almost every product I have ever had to order for a restoration has been backordered WEEKS. Year One seems to be the middleman on many transactions...not even sure if they keep anything in stock...

If its your only resort, then by all means order, but avoid YO at all costs IMO.

E

ive heard more than once that sometimes a hi vol. pump at hi rpms can move so much oil that a stock capacity pan can run low on oil and low pressure results. but this would be say 5000 rpm or higher for more than a few seconds. the solution would be a hi capacity oil pan.

But summit ships to you withing one or two days

I have a high pressure oil pump on my 440. It looks stock, but when i get on it, the oil pressure gauge pins at 100. Can this blow the oil filter off the engine?