New LiftPump/Regulator Installed

[CannonBall]

The initial results look promising so far. Last week I started a topic about installing a Holley (512-105) electric inline fuel pump. It was a 68GPH pump at 15PSI. The pump did a good job, in fact to good of a job. My fuel gauge was buried all the time no matter what the driving scenerio was and the fuel filter drain sprung a leak. Well, the fact of the matter turns out that this particular pump can deadhead over 60PSI. Bottomline? It needs to be regulated!



Holley also offers a version of this pump that is rated (REGULATED) at 50GPH at 15PSI. I purchased this pump, part number (512-103) as well as a Mallory 3-65 PSI return style regulator and the early results look good.



After a test drive today the fuel pressure at idle was 14 PSI and never dropped below 12. 5 PSI even at 105 MPH uphill with 32 pounds boost. I look to up the fuel pressure slighly via the regulator.



The Mallory regulator that I chose, part number (4309) as stated earlier is adjustable from 3-65 PSI. It comes ready for installation in applications requiring 3-12 PSI. My plans are to interchange the SMALL spring it comes equipped with for the MEDIUM spring. The MEDIUM spring is good for between 10-40 PSI. I am looking to regulate the fuel pressure to 16 PSI at idle and see a low of about 14 PSI at full throttle.



IMHO, a single lift pump is more than sufficient to maintain fuel pressure for the VP44. There are several people utilizing twin pump's but I am not quite sure that is necessary. The real test for the current pump I am using will be TIME. I will keep everyone informed. I am also going to try to get some pictures posted tomorrow.

 

[Rob Thomas]

CannonBall,just so I'm clear, is that Holley pump the only pump your using now?No liftpump period,just the holley?



Rob

 

[CannonBall]

Rob, I eliminated the stock Carter pump located at the engine and installed the Holley (INLINE) pump on the frame located back near the fuel tank. I am utilizing one lift pump only. No pusher pump per say.

 

[Bigsaint]

Good info, Cannonball. Keep an eye on that regulator, CSutton had a failure with a Mallory return regulator, I believe it was that model. He has since switched to a Aeromotive regulator with his current set-up.



Yikes !!! deadhead at 60 psi's. Think you were pushing that much on the initial install ???



Scott W.

 

[Rob Thomas]

That sound like a good way to run it,keep us updated on how it works,I will be installing a pusher pump soon or... ... ... ... ... ... ... ...

 

[CannonBall]

Scott, what pump was CSutton using when the Mallory let go? It seem's to me that he was using a pump with some incredible gallon's per hour. The pump I am currently using is only 50 gallon's per hour. I don't see it being a real concern but there is alway's the unexpected.



I also do not know what kind of pressure I was making on initial install but it had to be scary high. I did change my fuel filter after this incident and to my surprise it was still in one piece. Consider the filter tested.

 

[Blkdawdg]

I think that Chris was using the BG220HR (the same one that I'm still using) when his messed up.

 

[CannonBall]

Blkdawg, that seem's like alot of gallons per hour (FLOW). Is it really necessary? It just seem's like overkill and the life of the pump FLOWING at that rate would just be relatively short. Again, the old test of TIME will be the tell all.

 

[Bigsaint]

Not sure on which pump, Blkdawdg may be right. LOL on the filter. Hope it works out for ya. The worst part is the waiting, you really won't know if that pump is a keeper for at least one year. There is now other way though, just good old R+D and we will find the solution.



Blkdawdg... youv'e been running that BG for awhile now right ??? How many months/miles and does the BG220 have the ability to adjust it's psi's via deadhead, such as the Mallory ??? If not, what does it put out at post filter idle psi's ???



Scott W.

 

[CannonBall]

Scott, I just got to thinking about what I stated earlier about the pump I am using. I said it is only rated at 50 GPH, again, keyword REGULATED. Who know's what it can actually put out? This is kind of a confusing topic. Time to go to bed.

 

[Un-Hemi]

CannonBall, it appears that you are on the right track. How did you plumb the return line from the Mallory regulator back to the tank? Do the Holley pumps come with a mounting bracket?



The demands of the VP-44 and its own overflow valve determine the required flow from the pump. Any excess fuel flow capacity is simply returned to the tank through the bypass regulator. I believe that even the 512-105 would have worked fine with a bypass regulator on it.



I doubt that there was enough pressure differential or flow within the filter to damage it.

 

[CannonBall]

Tommy, I used a 1/4 pipe tee purchased at Napa to plumb the regulator bypass into the return line. It was a matter of simply cutting out about a 2 1/2 inch section of the 5/16's return line and installing the tee along with two 1/4 inch pipe to 5/16's compression fittings. Coming out of the bottom of the tee I installed a 90 degree elbow that is 1/4 pipe on one end and -6AN flare on the other side. The regulator has a 90 degree 3/8 pipe to -6AN adaptor as well. A piece of twist lock hose from Russell joins the two via some Aeroquip socketless fittings. The regulator is mounted on the frame about one foot ahead of the pump. I do look to get some pictures up today.



As far as the Holley pump, it comes with a very robust cushion style clamp to hold it to the frame. There are provisions in the pump (about a 3/4 inch wide metal ring) that the clamp goes around. I used a 5/16's X 1 bolt, nut, flat and lock washer to secure it.



I also think the 512-105 would have been fine but I just had to test them both. I am looking forward to getting the medium spring for the Mallory regulator and bumping the fuel pressure to around 15-16 PSI.

 

[CannonBall]

Guy's, here is a picture of the pump and regulator installed. #ad

 

[yogibear]

Gordon, its not working, ay least I can't bring it up, maybe its me.



Larry

 

[yogibear]

Is anyone else getting Cannonball's pictures??

Larry

 

[Un-Hemi]

No picture here either.

 

[yogibear]

Thanks TT, we've been waiting on someone else to reply. Cannonballs in bed now, has to go to work at 2AM, so won't see anything from him till tomorrow afternoon.

Larry

 

[Mopar-muscle]

no picture here ...



good timing on this thread , a week ago friday my carter HP4601 pump expired , wasn't paying attention and i ran the truck out of fuel , the pump would not draw fuel after i got fuel back in the tank .



pump life stat , 1yr , 32k miles , mounted in the factory location .



good thing i carry the tools , original pump and extra parts i needed to get myself back on the road .



blkdawg , how long has that barry grant been in service , not that i'm buying one , 220gph being choked by a 45ish gph filter is asking for a failure , of course i have no idea if you have a regulator mounted before the filter .



cannonball , csutton had his failure with the regulator mounted in front of the pump . the regulator should really be mounted as close to the injection pump as possible , minimum in front of the fuel filter . valso cannonball what are your truck specs ? year and such , what filter , what have you modified ... PM is ok if you are not into putting these things on the open board for the prying eyes of dodge ...

 

[CannonBall]

Guys, it looks like the photo attatch is down right now if what I heard is correct.



Mopar, Mallory did suggest to mount the regulator as close to the

carburator or fuel injection system as possible for maximum results. It was just easier to put it on the frame and tap the fuel return line. Do you think that this is real critical? The regulator is working.



I did here that CSutton had a Mallory regulator fail. Was the failure caused by where the regulator was located or something else? I never got the whole story. He was using a pretty major pump and could quite possibly had troubles because of the size of the return line. Possible backpressure building in the lines? Mallory recommends a 5/8's or even a 3/4 inch (I. D. ) return line when using a pump with that kind of flow.



My modifications are the first generation VA, boost box and DDStage1"s. I do have the old style fuel filter head as well. Let me know what you think about the regulator location. I hate the thoughts of moving it.

 

[Mopar-muscle]

i know his pump failed , but i didn't know his reg failed , i'm not here as much as i used to be .



in your case its probably not as bad , if you had 20 something psi after the reg then yes its to far away and should be mounted directly in front of the injection pump .



what is your pressure at present on the output of your filter housing ?



it may be an easier place to mount it , but it may not be the best place , yes you are returning excess to the tank , and the pump is basicly in a free run mode if its putting out more pressure than the reg is set to . i wonder if that will increase , or decrease pump life ????



i need to order a pump , but which one ???