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  • December 10, 2019, 02:48:31 PM

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Author Topic: Electric Fuel Pump for EFI  (Read 607 times)

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Offline jwinker

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Electric Fuel Pump for EFI
« on: July 16, 2019, 12:14:04 PM »
Curious question - I'm considering installing a Sniper EFI BBD setup on my car, and would need a high-pressure fuel pump & return line. When doing an EFI conversion, what have others done?

I have a Hyperfuel EFI in-tank pump I'm not using, but haven't really looked at how it would fit in the AMC tank. It drops in from the top of the tank & has AN fittings for send & return. Is there enough room above the tank to use something like this?

https://www.speedwaymotors.com/HyperFuel-40019-Hy-Fuel-Single-Pump-In-Tank-Retrofit-Kit,309274.html

It's all just ideas right now. For the moment the Eagle is up on jackstands and I'm refurbing the brake & trans cooler lines.
no spare time, no free time, no downtime, all you got is lifetime - GO!

Online djm3452004

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Re: Electric Fuel Pump for EFI
« Reply #1 on: July 16, 2019, 01:36:07 PM »
Curious question - I'm considering installing a Sniper EFI BBD setup on my car, and would need a high-pressure fuel pump & return line. When doing an EFI conversion, what have others done?

I have a Hyperfuel EFI in-tank pump I'm not using, but haven't really looked at how it would fit in the AMC tank. It drops in from the top of the tank & has AN fittings for send & return. Is there enough room above the tank to use something like this?

https://www.speedwaymotors.com/HyperFuel-40019-Hy-Fuel-Single-Pump-In-Tank-Retrofit-Kit,309274.html

It's all just ideas right now. For the moment the Eagle is up on jackstands and I'm refurbing the brake & trans cooler lines.



I hate to say it, but I don't think there's enough room above the stock tank to install something like this.  The tank sits flush up against the truck floor.  The front of the tank is loosely "wrapped" in a steel shield that is held in place with the tank straps, so there's really no way to fit in that spot either.  I just reinstalled my stock tank this past weekend so I remember all this vividly.

One would have to build a depression into the top of the stock tank in order to recess the electric pump you've linked to.

BUT...I'm saying all this from the standpoint of an Eagle wagon tank.  I'm willing to bet a Spirit or SX4 tank would be smaller (meaning hopefully shorter) and could perhaps fit into the same space with the same straps for a wagon.  You'd lose fuel capacity, but could space the tank below the truck floor with blocks or whatever to allow a gap big enough for your electric pump.  If you positioned the tank properly, the rear tank fill could hopefully be in the same location as a stock tank.

This is all speculation, honestly.  Either way, if I'm looking at your aftermarket pump correctly, you're looking at a fair amount of work cutting into any steel fuel tank to make it fit.  Are you sure this pump wasn't intended for a fuel cell?

Sorry for not being much help --

David
Current Project: 1983 Eagle Wagon 258
Past AMC Project(s):  1979 Spirit Liftback 232
                                1968 Ambassador 287

Offline vangremlin

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Re: Electric Fuel Pump for EFI
« Reply #2 on: July 16, 2019, 05:23:20 PM »
I have a throttle body fuel injection kit from Performance Fuel Injection Systems.  The kit came with an inline electric fuel pump, which pumps fuel to the throttle body, and the Eagle's return line is used to return excess fuel to the tank.  The kit has been used by a lot of Jeep owners, and several Eagle owners here on the Den.  I used an inline fuel pump recommended by the Jeepers rather than the one included in the kit because it is supposed to be quieter.

Regarding djm3452004's suggestion about using a Spirit or SX/4 tank, I don't know if that would provide the capability of adding an in-tank pump or not.  The opening for the sending unit on the SX/4 tank is on the front of the tank.  Also, if you wanted to go that way, you'd probably have to find a used tank, as I don't believe new ones are available.

Good luck!
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

Offline amcfool1

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Re: Electric Fuel Pump for EFI
« Reply #3 on: July 16, 2019, 11:37:06 PM »
hi, I'm looking at this as well, if you get the BBD kit, keep us posted, thanks, gz

Offline jwinker

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Re: Electric Fuel Pump for EFI
« Reply #4 on: July 20, 2019, 09:31:47 PM »
This is all speculation, honestly.  Either way, if I'm looking at your aftermarket pump correctly, you're looking at a fair amount of work cutting into any steel fuel tank to make it fit.  Are you sure this pump wasn't intended for a fuel cell?

Started replying to your post a few days ago, then the power went out as a lightning storm rolled in. It completely slipped my mind afterward!

So, this style of pump is modeled after a typical fuel cell pump, but intended for a stock tank where the top of the tank creates the floor of the trunk - like my '68 Falcon, for example. Which is how I ended up ordering a $350 fuel pump kit and never using it (yet). It's the same bolt pattern as a standard fuel cell, but the depth is adjustable and the pickup sock is flat. It's a really nice solution, but it does require about 1.5" of clearance above the tank. In that regard, you provided great info, since it saved me from dropping the tank to find out how it mounts! Too bad it's not going to work, though.

I finally finished my trans lines and cooler - NO MORE RED LEAKS!!!! I'm hoping I can get the carb dialed in this week & get a few hundred miles on the clock. We'll see!
no spare time, no free time, no downtime, all you got is lifetime - GO!

Online djm3452004

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Re: Electric Fuel Pump for EFI
« Reply #5 on: July 22, 2019, 09:09:59 AM »
This is all speculation, honestly.  Either way, if I'm looking at your aftermarket pump correctly, you're looking at a fair amount of work cutting into any steel fuel tank to make it fit.  Are you sure this pump wasn't intended for a fuel cell?

Started replying to your post a few days ago, then the power went out as a lightning storm rolled in. It completely slipped my mind afterward!

So, this style of pump is modeled after a typical fuel cell pump, but intended for a stock tank where the top of the tank creates the floor of the trunk - like my '68 Falcon, for example. Which is how I ended up ordering a $350 fuel pump kit and never using it (yet). It's the same bolt pattern as a standard fuel cell, but the depth is adjustable and the pickup sock is flat. It's a really nice solution, but it does require about 1.5" of clearance above the tank. In that regard, you provided great info, since it saved me from dropping the tank to find out how it mounts! Too bad it's not going to work, though.

I finally finished my trans lines and cooler - NO MORE RED LEAKS!!!! I'm hoping I can get the carb dialed in this week & get a few hundred miles on the clock. We'll see!


When you say "it's the same bolt pattern as a standard fuel cell", that's what I was getting at with the physical tank mods.  Clearance or not, you'd still have to cut a decent-sized hole in the top of the tank and graft in some kind of adapter ring, which would pose problems by itself because the top of the tank isn't flat, go figure.  It has several depressed "ribs" that run from front to back.  So certainly not impossible, just not what I would consider easy and "bolt-in".  :)

Anyway, hope you got your tuning done and managed to get those miles in!

Thanks!
David
Current Project: 1983 Eagle Wagon 258
Past AMC Project(s):  1979 Spirit Liftback 232
                                1968 Ambassador 287

Offline jwinker

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Re: Electric Fuel Pump for EFI
« Reply #6 on: July 22, 2019, 09:49:33 AM »
When you say "it's the same bolt pattern as a standard fuel cell", that's what I was getting at with the physical tank mods.  Clearance or not, you'd still have to cut a decent-sized hole in the top of the tank and graft in some kind of adapter ring, which would pose problems by itself because the top of the tank isn't flat, go figure.  It has several depressed "ribs" that run from front to back.  So certainly not impossible, just not what I would consider easy and "bolt-in".  :)

Anyway, hope you got your tuning done and managed to get those miles in!

Thanks!
David

Haha! Yes, we are talking about the same thing in that respect. I already had the expectation of the work to the tank itself. In fact, that's part of the reason it's not in the Falcon already.  ;) There is a 2.25" hole for the main body, then 6x 1/4" holes for the mount. The kit contains all of the flanges to make it work - a C-shaped flange for inside the tank with screws protruding up, then a thick gasket to seal against any metal ribs flattening you don't get 100% flat, then the pump itself.

There's a video at the bottom of the link that shows it installed in a '65 Mustang. It's a BEAST of a fuel pump setup - which is exactly why I want to use it rather than leave it sitting on my shelf. But, it sounds like it's not going to fit the Eagle.

I took the car out yesterday and it runs great once warmed up. Then it started slipping when taking off from a red light. After reading some posts on here, it seems like the transfer case slipped out of gear, and flipping it into 4wd seemed to fix it. I drove it to work in 4wd this morning, and it seems fine. I know ONE of the front yellow vacuum ports on my transfer case actuator is rusted out, but it looked like that's just ambient pressure anyway. The red line looks good, and it definitely shifts into 4wd. When cold, it still stumbles and pops and fights when trying to accelerate. It's a work in progress.
no spare time, no free time, no downtime, all you got is lifetime - GO!

 

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