crashgordon

I did a search on this board and didn't find any info on it so I thought I would post a link to the discussions about it.

Save your motor read this

http://forums.godragracing.com/viewt...095&highlight=

This is also good.It also mentions the BB pumps.Angry Drag Racers here.

http://drr.infopop.cc/eve/forums/a/t...2/m/8711073162

Pete K

I just got wind of this myself. I have a couple of fairly new pumps here now that I plan to compare to an older melling.

lcvette

whoa.... so whats another good pump to use.. I am about to reassemble my new VERY expensive VERY big (~1000rwhp) power motor and really don't want the money spend on a bullet proof shortblock going down the tubes from crap pump.. maybe a Blue printed Moroso or something?

Chris

Bluewasp

Links don't work.. ???

Pete K

I have used Dynagear in the past. Decent quality, not bad pricing.

Corvette Kid

That's what I used this time.

comp

let us know

JAKE

For that amount of investment and shooting for that kind of power, I'd move to what the Pro Stock boys use and go Dry Sump.

Jake

lcvette

Jake,

that power is only brief and not sustained as it is a street car with a large turbocharger... the rest of the engine is fairly mild as far as cam and heads go nothing too wild. the power is made with large amounts of boost and a small hit of juice.

Dry sump is out of the question as it will not work with my particular turbosetup.

Need reco's on good wet sump pumps.

Chris

93LT1

Here's the link..

http://forums.godragracing.com/viewtopic.php?t=36095

Ruff Rider

Yep, this link works, thanks... 101st Airborne

Midnight 85

Has there been a lot of failures with the new pump or just one or two? I am concerned because I just buttoned up my new 383 and it has a new M55HV inside it.

cv67

This is not good, read this on another forum I hang out on:

=
It is fact on the small block pumps.
The M55, M55A castings are much thinner
The old one was about 1.25 across the neck or thin part
The new ones are about .80 & you can see the "hump" where the oil passage goes through.
Just for info, I have a new Moroso 22100 "blueprinted pump" sitting in the shop & it is the new thin casting All the "new" performance pumps will have a 5 digit number
http://data.melling.com/Select/oil_pumps.php

Doesnt anyone make quality stuff anymore?

Slalom4me

Titan Engineering has a good reputation. I have not used their
pumps myself but an acquaintance does.

Titan Oil Pumps

Custom oil pans adapted for the Titan pump from Billet Fab

I agree with cuisinartvette about the Moroso pump being
based on the Melling. Other performance pump vendors
source their OEM-style pumps from Melling, too.

.

rklessdriver

The Titan pump is a first class peice. CVR also started making a new line of billet alum pumps and they are very reasonable price wise. My supplier has them listed now.

http://www.competitionproducts.com/p...ber=CVROP65575

I am seriously considering using one of these in my new engine... if it will fit my pan. If not looks like I'm stuck trying to find an old Melling M155.
Will

Slalom4me

Before everyone with the new thinner Melling pump
gets their panties in a twist, consider whether your
application is as demanding as the cases where failures
have occured.

Broken oil pump driveshaft

ed hess appears to be using the Melling pump on a Buick V6-based
drag motor and running oil pressures that are well above what
the small block Chev needs.

My vote is that if your max oil pressure is in the conventional
range of 50-60 psi, the Melling pump is going to provide years
of trouble-free service in a SBC engine.


Edit (12/15/2006)
It is always unpleasant to have to eat my words, but I am editing
to say that I changed my opinion.

There is enough evidence that I now feel that even my modest
application would be at risk of a pump failure.

My change of heart will be apparent to anyone who reads through
this thread and the two others that spun off from it

Moroso oil pumps

Pics of Melling potential disasters!!!!!

As I've written elsewhere, I want to thank CrashGordon for creating
this thread.

.

85vet

Basically Melling cheapened their oem pump and recommend using their racing pump that is a little beefier than the original versions. This changed occurred early 2006.

The problem is Melling only tells you that they reengineered the pump with a little notice in the box. Remember that these are OEM pumps, and engineered to perform as OEM not racing or high performance.

Pete K

This post will make Beppe sweat. I have his 396 on the stand, and it has the new, thin style pump on it. It does not "look" like the pump will be a problem, but I am glad to be aware of it. I did not immediately notice the difference until I looked close.

85vet

Pete, wasn't there a small notice sheet in the box?
For safety sake, I am changing mine out. Beginning of 2006 season I put a new pump in before I new what the re-engineering was. The racing version is about $20 more and comes w/ a new shaft. I consider it cheap insurance.

Change above to - costs $65.

Slalom4me

I was surprised to find out how reasonable the price was
for the pumps that come with the modified pressure relief
and the pressure balance grooves. Years ago I did my own
work to add these features a few times years ago and I
wish I could have bought ready-to-run pumps back then.

If Melling offers a thicker wall version of their pump,
my guess is that (relative to an engine rebuild) it is
not that much more expensive than the thin wall version.

Beppe has had some hard luck. Even though he may not need
the thickwall pump, if piece of mind can be purchased by
paying an extra $50 or so for the heavy-duty unit, by all
means, do so.

.