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Retrofit In Tank Fuel Pump #2789390
06/26/20 10:29 AM
06/26/20 10:29 AM
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North Dakota
6PakBee Offline OP
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I'm throwing in the towel with my 1972 W200. Let it sit for a week and crank, crank, crank to get fuel into the carb. Has anyone retrofitted with a low pressure (carburetor) in tank fuel pump? Which one did you use? Anything special for a control circuit?


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Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789432
06/26/20 12:18 PM
06/26/20 12:18 PM
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Calgary, Alberta Canada
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I have found that using NON ethanol fuel makes HUGE difference in my carburated cars ! . . . around here, that means using premium, even if the higher octane rating not required in my cars. But can let sit for almost a week without the fuel evaporating out of the carb bowl.

Just my two cents . . . .

Cheers

Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789443
06/26/20 12:35 PM
06/26/20 12:35 PM
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Anderson, IN
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1969RR Offline
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Originally Posted by 6PakBee
I'm throwing in the towel with my 1972 W200. Let it sit for a week and crank, crank, crank to get fuel into the carb. Has anyone retrofitted with a low pressure (carburetor) in tank fuel pump? Which one did you use? Anything special for a control circuit?


Hello, I've done a couple cars with an electric, low pressure, pump installed in-line that is actuated with a toggle switch. Turn it on when you're first starting the car. Not the best way to fix the issue tho. If your mechanical pump goes bad, the electric pump can pump fuel into the oil. The ideal way is to put in a retrofit style tank and in-tank pump. I'm using EFI, but you can get regulators to limit your pressure to 6-8psi for your carb. I got mine from Tanksinc.com. I assuming it's a "B" body and they do make the tank for it. Jeff

Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789448
06/26/20 12:38 PM
06/26/20 12:38 PM
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Holley has a big selection of retrofit in tank pumps but not sure they'll have anything for a W200.

Re: Retrofit In Tank Fuel Pump [Re: AndyF] #2789481
06/26/20 01:24 PM
06/26/20 01:24 PM
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West Coast, USA
jbc426 Offline
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If you use a return style pressure regulator, you can fit an in tank pump into your fuel tank through the stock sending unit opening. Here's a few pic's of how I attached mine to the stock sending unit. If you look closely, you can see the up-sized return line silver soldered to the sending unit ( note it is pointing away from the pump pick-up). Your return line will need to be at least as large as your feed line to avoid restriction at such a high bypass rate encountered with the low fuel pressures that you need to run with a carb set-up.

I sourced the bulkhead electrical fitting from Radium Engineering and the submersible fuel line from Harmon Racing Cells.

I run an EFI system on my '68 with a surge tank up front, so the pump pictured flows at near 0 psi and at full flow as the tank fuel circulates through the surge tank up front. This eliminates the cavitation issues associated with fuel slosh at the tank during low fuel level use extremely well.

Sending unit mod 3.jpgSending unit mod 1.jpg

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789542
06/26/20 04:29 PM
06/26/20 04:29 PM
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I'm cheap and lazy, on my old carbed vehicles I just give them a shot of starting fluid if they have been sitting for over a week. It lets the engine run a few seconds and pump fuel into the carb.

Re: Retrofit In Tank Fuel Pump [Re: jbc426] #2789654
06/26/20 07:42 PM
06/26/20 07:42 PM
Joined: Jan 2003
Posts: 10,665
North Dakota
6PakBee Offline OP
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Originally Posted by jbc426
If you use a return style pressure regulator, you can fit an in tank pump into your fuel tank through the stock sending unit opening. Here's a few pic's of how I attached mine to the stock sending unit. If you look closely, you can see the up-sized return line silver soldered to the sending unit ( note it is pointing away from the pump pick-up). Your return line will need to be at least as large as your feed line to avoid restriction at such a high bypass rate encountered with the low fuel pressures that you need to run with a carb set-up.

I sourced the bulkhead electrical fitting from Radium Engineering and the submersible fuel line from Harmon Racing Cells.

I run an EFI system on my '68 with a surge tank up front, so the pump pictured flows at near 0 psi and at full flow as the tank fuel circulates through the surge tank up front. This eliminates the cavitation issues associated with fuel slosh at the tank during low fuel level use extremely well.


Thank you, thank you!! up


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789659
06/26/20 08:05 PM
06/26/20 08:05 PM
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Sniper Offline
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maybe we ought to ask why you want an in tank pump for a carbed setup? Plenty of external ones have been used for decades and way simpler to install.

That said, my 87 Diplomat had a factory in tank pump to supplement the mechanical one. It was a cylindrical pump that was essentially mounted where the pickup sock would have gone, then the pump inlet had it's own sock. It was locked up when I pulled it out and I had no idea there was a pump in there till then, so who knows how long it had been locked up, didn't seem to be needed to me.

Re: Retrofit In Tank Fuel Pump [Re: Sniper] #2789802
06/27/20 10:28 AM
06/27/20 10:28 AM
Joined: Jan 2003
Posts: 10,665
North Dakota
6PakBee Offline OP
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6PakBee  Offline OP
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Originally Posted by Sniper
maybe we ought to ask why you want an in tank pump for a carbed setup? Plenty of external ones have been used for decades and way simpler to install.

That said, my 87 Diplomat had a factory in tank pump to supplement the mechanical one. It was a cylindrical pump that was essentially mounted where the pickup sock would have gone, then the pump inlet had it's own sock. It was locked up when I pulled it out and I had no idea there was a pump in there till then, so who knows how long it had been locked up, didn't seem to be needed to me.


Fair question. Frequently I don't drive the truck for weeks at a time. When I do it's either give it a drink of gasoline down the carb throat or crank for what seems like forever before it fires. Have replaced the pump, the fuel line sock, and leak checked the fuel line. I'm just tired of this and feel an electric pump will solve the problem. shruggy


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
Re: Retrofit In Tank Fuel Pump [Re: 6PakBee] #2789914
06/27/20 03:34 PM
06/27/20 03:34 PM
Joined: Mar 2007
Posts: 3,275
West Coast, USA
jbc426 Offline
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Originally Posted by 6PakBee
Originally Posted by jbc426
If you use a return style pressure regulator, you can fit an in tank pump into your fuel tank through the stock sending unit opening. Here's a few pic's of how I attached mine to the stock sending unit. If you look closely, you can see the up-sized return line silver soldered to the sending unit ( note it is pointing away from the pump pick-up). Your return line will need to be at least as large as your feed line to avoid restriction at such a high bypass rate encountered with the low fuel pressures that you need to run with a carb set-up.

I sourced the bulkhead electrical fitting from Radium Engineering and the submersible fuel line from Harmon Racing Cells.

I run an EFI system on my '68 with a surge tank up front, so the pump pictured flows at near 0 psi and at full flow as the tank fuel circulates through the surge tank up front. This eliminates the cavitation issues associated with fuel slosh at the tank during low fuel level use extremely well.


Thank you, thank you!! up


No problem. I use https://www.deatschwerks.com/ for my fuel pumps these days. Look for one of the lower flow rated pumps for a carb'd application. This type of in-tank pump doesn't like to be used in a deadhead type set-up as they tend to build up heat in those applications, as the fuel flowing through and around them helps keep them cool.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)






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