Desperate for fuel assembly help!!!

[robsim111]

Hi all! I have a 1969 Bronco, and I recently ditched my Holley 600 for a FiTech setup. I have everything running smoothly, but I'm having one issue. The inline fuel pump that came with the kit is so damn loud that I can't even hear the motor. I went as far as wrapping it with firewall insulation and taping it tight and mounting on to rubber, however, the mofo is so loud it didn't help.

I have this fuel tank:

https://www.wildhorses4x4.com/product/Rear_Fuel_Tank_23gallon/Bronco_Steel_Fuel_Tanks

It sits so far down below the frame, that I had to mount my fuel pump to the to lowest part of my body to at least get it within 6 inches of the inlet. I plumbed the drain port on the gas tank with a 1/4" NPT to 6an Male fitting and am using it as the inlet. I'm using the tanks designated 5/16" inlet as a return port for the fuel injection. This is the best I have been able to do, as it is not physically possible to mount an inline pump correctly on the Bronco without a body lift or a drop bracket that will drag on the ground.

So I'm looking at in tank fuel assemblies. I am running the stock fuel sending unit that is designed for the fuel tank, but it is not set up to add a fuel pump to it. Has anyone run into these problems? I do not want to drop the penny to buy a new gas tank that is made for the fuel injection unless it is ABSOULTELY necessary.

I recently ordered these parts to see if they will fit depth wise when they arrive, but I'm at a loss for what is actually functional.

https://www.amazon.com/gp/product/B000C4FXGK/ref=oh_aui_detailpage_o01_s01?ie=UTF8&psc=1 --- This is a 1997 F150 assembly for 5.4L with 23 gallon tank

https://www.amazon.com/gp/product/B01D8VLUDS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 --- Purchased this pigtail to run wiring for pump and sender.

I cannot find any info on what people are using in the Carb style tank to use as an in tank fuel pump. Any help would be appreciated!

-Rob

EDIT: I'm running the FiTech inline fuel pump kit. It came with whatever brand fuel pump they use and a pre/post filter and 3/8" line. There is enough gravity feed to shove fuel out through the hose at the pump when disconnected. I drained tank, and pulled fitting off of filter, and it is perfectly clean. Fuel was clean too. I should say this tank is sealed and 100% rust free inside.

Pics of setup: https://imgur.com/gallery/iXIjDJt


EDIT EDIT: My pump sounds just like this: https://www.youtube.com/watch?v=9uVkB2RkmIc

 

[broncodriver99]

What pump are you running? Any info on the supplied pump? Inlines can be noisy(whine) but shouldn't be THAT loud. I would have plumbed the pump to the fuel outlet(pickup) nipple on the front of the tank. I don't see any reason to go all the way down to the drain fitting. Not to mention there is no filter there and it will pick up every piece of trash that settles to the bottom of the tank. That could be why your pump is so noisy(trash in it).

I had the same tank until recently. I imagine you could get one of the EFI pump kits that Wild Horses as well as most of the other Bronco vendors offer and change it over to an in tank pump with a little creativity. May have to change the sending unit over to one that has the pump wires. I think the fuel outlet nipple is smooth tubing instead of barbed, it should be barbed if under pressure. You may need to do something to address that.

I would definitely change the way you have it set up. The pump and pickup lines hanging low and unprotected is a BAD idea.

Maybe take a couple of pics to help with the troubleshooting and suggestions.

 

[Hazegray]

I ran into the same issue with the FITech fuel pump kit I got from Summit. It got soo bad, I contacted Summit Racing and they replaced it with another fuel pump. The new one is not so bad...

 

[bronkenn]

Do a search on here for Bosch fuel pump. People said they were a lot quieter. Ken

 

[marshall godron]

I seem to remember one of the vendors offering a weld in conversion kit. BC Broncos??? I tried to search for you but couldn’t find it. But I remember it was to convert the 23 gal tank to a intank pump setup. Maybe someone else can help find it

 

[robsim111]

What pump are you running? Any info on the supplied pump? Inlines can be noisy(whine) but shouldn't be THAT loud. I would have plumbed the pump to the fuel outlet(pickup) nipple on the front of the tank. I don't see any reason to go all the way down to the drain fitting. Not to mention there is no filter there and it will pick up every piece of trash that settles to the bottom of the tank. That could be why your pump is so noisy(trash in it).

I had the same tank until recently. I imagine you could get one of the EFI pump kits that Wild Horses as well as most of the other Bronco vendors offer and change it over to an in tank pump with a little creativity. May have to change the sending unit over to one that has the pump wires. I think the fuel outlet nipple is smooth tubing instead of barbed, it should be barbed if under pressure. You may need to do something to address that.

I would definitely change the way you have it set up. The pump and pickup lines hanging low and unprotected is a BAD idea.

Maybe take a couple of pics to help with the troubleshooting and suggestions.

It's the inline pump that comes in the FiTech kit. I edited my post and added links to pictures of the setup. I didn't want to use the standard outlet (5/16") because the instructions distinctly call for using 3/8" hose, and that's what size was supplied. It also stated to mount below the lowest point of the tank for the gravity feed. I drained the tank today, and checked the filter and its all clean. There was no trash in the fuel either. My tank is sealed with Por-15. Rust free. I should add that there is enough gravity coming from my setup that fuel shoots out of hose if I disconnected it anywhere pre-pump, so I don't think priming is the issue. Maybe it is cavitating?

 

[Broncobowsher]

Do a search on here for Bosch fuel pump. People said they were a lot quieter. Ken

You have to be careful with that. Something like a Bosch 044 pump is an impeller design that works best in tank, below tank, or fed off an accumulator. In short, it won't pull fuel if there is any air in it.

Get something like an Airtex E2000 pump and it is a vane design. This will pull a vacuum and suck fuel. Works much better in an inline situation.

You need to look at the design of the pump more then the name on the pump.

 

[robsim111]

You have to be careful with that. Something like a Bosch 044 pump is an impeller design that works best in tank, below tank, or fed off an accumulator. In short, it won't pull fuel if there is any air in it.

Get something like an Airtex E2000 pump and it is a vane design. This will pull a vacuum and suck fuel. Works much better in an inline situation.

You need to look at the design of the pump more then the name on the pump.

They are pretty cheap price wise. This FiTech one says that it has 0 pull, and that it will burn the pump up. I think a Vane one would be MUCH better in my application. Have you used one before?

 

[Broncobowsher]

I've used junkyard pumps before. I'm doing my research for new pumps this time. The Carter P4070 that I have used for carb applications is a vane pump, and I know that pulls well. I've mounted it behind the headlight and at the master cylinder (pretty high up) and they pulled just fine. Even in AZ heat. I had a mystery EFI pump new in a box that I kept as a trail spare. Used it for firing up an engine on the garage floor. Pump was lifting fuel 3 feet out of a gas can.

There are so many options and I have not gone shopping on 10 years or so. Actually want 2 pumps for the ¾ton truck. One for each tank (big blocks are thirsty). Going to use check valves and the selector valve is going to select the return route. Supply is selected by powering separate pumps.

 

[robsim111]

I think I'm going to pull the pump off the tank, and pull from a cell that will be seated 3 feet above the pump. If the pump still makes noise, then I know I need to call FiTech and let them know the pump is junk. I may just go with a Carter P5000 and see what happens before I try in tank pump. Id still ilke to know if anyone knows of an in tank pump that will work though.

 

[Cortez]

Do yourself a favor and ditch the fitech pump, that bastard is so noisy I was embarrassed to pull up next to someone at a stoplight. No configuration change is going to make it better. I used a Bosch to replace mine and I know there’s others as well. Search the forum for “fitech”, there is a thread referencing something like “what we’ve learned” and the details are in there.

 

[Eoth]

Do yourself a favor and ditch the fitech pump, that bastard is so noisy I was embarrassed to pull up next to someone at a stoplight. No configuration change is going to make it better. I used a Bosch to replace mine and I know there’s others as well. Search the forum for “fitech”, there is a thread referencing something like “what we’ve learned” and the details are in there.

I'm got a LOT of noise also.. Off hand do you know which model of Bosch you used?
I'm plumbed into the tank with its original 5/16 fitting and thinking I might be sucking through a too small of a straw....

 

[PaveBronco]

Do a search on here for Bosch fuel pump. People said they were a lot quieter. Ken

That's correct I used to have a Carter and swapped it out for a BOSCH 69100, it was much quieter.

 

[Broncobowsher]

Just looked at the 69100
Another impeller design. From reviews online it is quiet and pumps great, just won't pull a prime.

 

[needsmoarturbo]

The problem I have encountered with inline pumps is they vary wildly in quality and noise level. I originally went EFI in 2001 with an inline pump for a 86f250 which was an airtex e2000 pump. It worked great and was quiet. 15 years later and the bronco had been sitting for a few years I had to replace that pump because it got gunked up while sitting.
The replacment I got from o-reillys which was supposed to be the same pump was a different outer diameter than the original one, and it was very noisy compared to the first one.

To add to the sample size, my brother went through several cheap ebay sourced pumps that failed after only a few months on one project car, and had a noisy NAPA sourced pump that worked for a long time but was noisy from day 1.
The frustrating thing is, all these pumps look very similar from the outside and its unsure the actual brand or manufacture of most of them.
I can verify that the airtex e2000 was a good pump, but not sure where to source it anymore

 

[Dlish]

There are a couple of threads with people using that same/similar tank and a pump mounted on the frame, without major issues. Second link has some pump options people have used.


http://classicbroncos.com/forums/showthread.php?t=275931

http://classicbroncos.com/forums/showthread.php?t=278506&highlight=fitech+pump


I am getting close to putting the motor back in and using FiTech. Also have the same tank, and was planning on just mounting the pump to the frame. I understand that the fittings on the tank may not be ideal size, but I did not want to overthink it too much...figured I would hook it up and see what happens.
I bought the same pump KyleQ had a link to:

https://www.amazon.com/dp/B00AC5LDIG?tag=viglink21140-20

 

[rguest3]

I have installed the Walbro GSL-393 (160LPH) Inline Pump in a few EFI conversions for 5.0L/302. It comes in Kit form with all the fittings and 6AN as an option. Other Walbro pumps would be used for additional volume in larger, more modified engines.

GSL-394 - 190LPH
GSL-392 - 255LPH

The only time I vaguely hear this pump is when I first turn the Ignition key when the pump primes. Slight hum.

When initially installing, all lines with Fittings, pump and filters are mocked up. Then, with the pump hanging down off the frame, pre and post filters too, below the tank, the new lines are flushed when keyed on. After this prime and flush, everything is put back in place to complete the install.

The Walbro pump is never really heard from again.

 

[AZ73]

I'm using the Bosch (which is now called Walbro in the US), wrapped in foam insulation, and hung on 2 brackets each with 1 bolt holding them to the frame, right under the front seat. Barely hear it when I hit the electric, can't hear it at all when the engine is running.

There are a lot of fake Walbro's out there (think Amazon). Buy from a certified reseller. I called Walbo and they said this place is certified, and because of their volume, has good prices. Great customer service when I needed some filters and new pump ends too. Remember, your filter must be 10 microns or less AND be able to take the pressure. This place was the only place I could find one with those specs.

http://walbrofuelpumps.com/

I'm running this as the HP pump:

http://walbrofuelpumps.com/walbro-gsl392-inline-fuel-255lph-pump.html

 

[bmc69]

I've run the Holley in-line EFI pumps for many years; they've always been very quiet.