another after market lift pump bites the dust

[csutton7]

well my Mallory 110FI pump decided it had had enuff-so kaput--I'll send it back for repair and see what they say-so onward to the thinking barn as which one to try next for the ultimate one pump set up-chris

 

[Bigsaint]

Sorry to hear, Chris. Any idea on what's next in line ? Summit pump, another Mallory, etc ? I know that you have a replacment in the truck right now, but if you want to borrow my refurbished 4150, I'll send it out to ya. Let me know. I would have thought the Mallory 110 was going to run for a long time, especially since you had a regulator with a return to the tank.



Scott W.

 

[csutton7]

Big Saint--thanks for the offer- I'll let you know if I want to borrow it---



yea I thought it run for a long time too, but on this pump is a cavitation line that can be plumbed in and although I was set up for it I never did connect it, maybe I should've and if this is the cause of the failure I'll plumb it in and give the pump another shot--there were diagrams to plumb it in and one of not using it--so I chose the later--maybe that was the problem, maybe not, we'll see what Mallory says----chris

 

[MikeR]

Maybe it's time to check out the Marine pumps simply because of their high duty cylce. I was at a local supply and checking them out,but they're $200 bucks. Not a cheap experiment.



-Mike

 

[Steve St.Laurent]

I'm keeping my finger's crossed that the pusher pump setup I'm running holds up - this is a nightmare! Seems that one option after another doesn't work.

 

[THartel]

Please don't blast me for this suggestion but, I work at a GMC dealer and on the 6. 5 diesel they use an inline electric pump. According to the service manual it produces 7-10 psi. Since its made to run in diesel fuel maybe this might be an answer. I know the 6. 5 can't really be compaired with the mighty Cummins, but it might be worth a try. Our parts dept told me the dealer cost on the pump is $52. 00. Only headache might be the line connections, as they are a ISO flare with o-ring.

Don't know Just an idea.

 

[Morphious]

Sorry to hear about your trouble. My mallory 4150 is still going strong. I now have somewhere around 50-60 thousand miles on it and it is still going strong. It has even survived the under hood fire I had due to an electrical short 3 weeks ago.

 

[Bad340fish]

I haven't looked to see if there are any rubber lines near the tank. But if there was that GM pump might work great as a feeder for the stock one.



I wonder if when the VP44 demands a ton of fuel if that pump would keep up with the carter?? If it couldn't it would actualy hurt delivery during heavy fueling.



THartel, are the fittings your describing the same tipe that is used on those *&^%^& fuel filters that GM has on their gassers?? I can't picture that type of fitting in my head. If its not that fitting it might be easy to convert it to hose or compresion fittings using some brass stuff.



I have been around racing long enough that I would not trust a "high performance" fuel pump on my truck for anything more than a helper to the stock one(which is not much better I guess lol) I have a holley Blue pump on my car that has worked great for two years... to bad its MAYBE got 1000 miles on it.

 

[csutton7]

If Big Saint's pump wouldn't have burned up, I'd have said the Mallory 4150 is the pump that has proven itself for at least a year on a couple of known trucks and would be the one to get, but I'm still reserved on this one just because of Big Saint's misfortune. It still may be the best option--I will try a different pump out in the near future-don't ask me why--stupidity maybe or just want to find a pump that will work--I'll let everyone know if it works out after it has some time on it---



The Summit pump is noisy, no it's very noisy, so if you buy this one you'll have to take some measures to keep the noise down--it's the noisiest I've heard---



the Holley 12-815 pump is a dog during WOT so I'd rule this one out too---



The BG220HR has burned up on a couple of trucks, but I believe it is still working on some others--it too may get another run since my plumbing has changed since it failed



anyone else want to add to the pumps they have used or are using--it'd be nice to see what's out there that's being or has been used..... chris

 

[Bigsaint]

I agree Chris, but remember, Mallory insists that mine died from cavitation due to debris entering the gerator. Other than Nowel's brush replacement the 4150 has been holding up as best as any other options right now. I'm hoping that the addition of the Earl's filter will be enough for a long life, dare I say a year or more.



That's too bad on the Summit pump and it's racket, but I'd put up with a screaming pump if it had longevity, guess only time will tell. Is Nowel still running the Summit and if so, what are his FP readings @ Idle and WOT ?



I'm sure interested to hear the Mallory autopsy results of your 110.



Scott W.

 

[EMDDIESEL]

I ordered that pusher pump setup from Enterprise. My question is, if EITHER pump fails, am i dead where i am? In other words, does the design of either pump mean that if its not running, no fuel can flow?

 

[THartel]

Bad340fish, Yes the fittings are the same as the GM gas fuel filters, But my mind must be failing me as the diesel electric pump that I described has also been used in prior years on the dreaded Olds 4. 3 v-6 diesel. Only reason I remembered that, is that I have a 1984 Olds Ciera fwd with this engine sitting down at my raceshop as we speak. Still runs great! Hard to believe. The pump is the same design as the 6. 5 turbo pump and same pressure specs. (according to service manual for 84 Ciera's) But as a bonus it has regular 3/8 double flair fittings on each end. Nothing special like the new pumps. Tuesday night I have to replace the belt driven vacuum pump on this car. After I finish I'll hook up a presure gauge and take some readings and post the results. This might just be a resonable pump for our use. And yes if it fails the stock transfer pump on the Cummins can still pull fuel through this pump. As a bonus this pump is very quite(sp)

 

[Arcticat]

Just a note on that Summit pump - I've had it on now for about 7000 miles. To my knowledge I was the first one to try it out, based on the suggestion of Sportbike several months ago. It is noisy, but I can assure anyone who is pondering using it that you will get used to the noise. To me it is a small price to pay for what I hope is a reliable option. It produces 15psi at idle and 13psi at WOT. Plus it only costs a hundred bucks, cheaper that any other option except the Carter HP pump. I still feel good about the choice. Good luck to all of you!

 

[HVAC]

The Mallory Will Go Back On

Bigsaint, you should have seen "10 Thumbs Sutton" and I trying to get the replacement brushes in my Mallory Oh boy, we musta looked like the keystone cops! We broke both sets of brushes I had. I ordered a couple more sets today.



The Summit is working well. The pressure is running at 16 psi at idle and I think Chris said it would drop to 9 under hard acceleration. Problem is the thing is about as suttle as a chain saw!!! It must have a design based on that of a wood chipper cause that's what it sounds like



EMD Diesel, I believe you have just hit on the main problem I have with tandem pumps. If one goes then you are in the hurt locker. You haven't improved your position IMO. I may be able to agree that running two in tandem may extend the failure interval. But that needs to be meated out via real world testing. Kurt had a good idea where his dual pumps are in parallel. If one dies he is no worse for the wear.



I still believe that we will find a sweet single pump that will have legs and provide good performance.

 

[R.ebel]

Tandem pumps

On aircraft they plumb in a bypass around the booster pump using tee fittings and a one way check valve. That way if the pump goes 'toes up' there is a free flowing path around the dead pump.

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[Bad340fish]

Mallory

Whats the GPH of the Mallory you guys are running?? A friend of mine has one on his nova, I will get the # from him this week. Anyways the thing is old, its at least 5 years old that I know of. And its massive as far as flow goes!! When we first put his car together we plumbed with 5/8" aluminum line with a 3/8" return going to a Dominator Carb. Well after struggling with what we thought was a bad regulator we had to go to a 5/8" RETURN because it flowed to much fuel back to the tank for the 3/8" line. As a temp fix we ran another return off of the pump to the tank. His tank looked like a chemistry set lol. Its been a good pump, but it is not used with diesel, or everyday driving but it does have a good amount of street time on it. If its not the pump you guys have been running it might be a good one to try. Its not loud and it sounds as if its not doing any work at all(which I guess is good) HVAC is right... . there is a pump out there! That summit pump has got to be a rebadged pump, I wonder who makes it?

Clark

 

[Bigsaint]

Artic, good info, thanks. Should be interesting to see what it does in the long run, I hope it's aces for you !



Nowel, lol@ the brush install, I read about it on the other site. If you manage to get the 'technique' down, please let me know as I'm sure it will be somwhere in my future .



Bad, the Mallory that I am using is rated at 140 GPH, I believe the one that failed on Chris S. was rated at 110 GPH. My biggest concern that I have with mine is that it is running without a regulator and return to the tank. I was pretty much sure that this may have helped my first one to go south, but I belive Chris was running the 110 with a reg. /return, so there goes that thought.



I agree 110% with HVAC, we WILL find a pump that suits our needs and is reliable, for now I'm sticking with the 4150, but if it goes again, my next choice will be the summit. I'll get used to the sound, as I did the Scotty air system. Whistle ? What whistle .



Scott W.

 

[Morphious]

I have been running my mallory without the regulator and anykind of filter before the pump without a failure, and would have to agree with Big Saint that the regulator is not an issue. I ran new SS 6an line from the fuel pump (located back by the tank) to the fuel filter with weber carb adaptor plumbed into the filter housing. I am also using the power that the original lift pump used, just cut the wires and ran 12 gauge wires back to the pump.



Morph.

 

[Bad340fish]

Have the failed pumps had a filter before the pump?? If so that could be a problem. On the car I mentioned above we had a low fuel pressure problem at first, and the pump sounded like it was not under a load at all. After we jacked with it forever we removed the filter from in front of the pump. BINGO then we had wayyyy to much pressure. It was a -8 filter so I know it wasn't to restrictive. The pump just did not pull fuel hard enough to get through the filter. Just a thought, The car still had good PSI at idle but it had no volume. If the pumps are just barely trickling fuel they will get pressure but might be killing themselves in the process.

Clark

 

[EMDDIESEL]

I think i may try R. ebel idea of a bypass around the booster pump "just in case". What is you guys take on warranty issues at the dealer with a Booster pump?? Think if they see it they would give you a problem? I wanted to to do the Jannetty fuel line kit and Ted said if a dealer saw that they would freak. But i am wondering if i just do the booster pump will then say anything?