Author Topic: RobbMc sending unit or sump?  (Read 1349 times)

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scott foxwell

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RobbMc sending unit or sump?
« on: May 26, 2018, 02:44:13 PM »
Anyone have any experience with the bigger tube RobbMc fuel sending units? I have a new fuel tank for my 67 Fairlane and I'm at a cross roads whether or not to install a sump, or use the 1/2" pick up from RobbMc. Now's the time if I'm going to add a sump. Pro's and con's? TIA

jayb

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Re: RobbMc sending unit or sump?
« Reply #1 on: May 26, 2018, 05:33:50 PM »
I've got one on my 68 Mustang and will be buying another for my Shelby.  Mine came with AN fittings so hooking up the fuel lines was easy.  The only issue I have is the fuel gauge doesn't read quite right, but that problem may be elsewhere, perhaps the dash voltage regulator...
Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

Tommy A

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Re: RobbMc sending unit or sump?
« Reply #2 on: May 26, 2018, 09:36:34 PM »
Scott, my son and I both have them on our fairlanes a 66and 67, both fuel gauges read waay off, I believe he put in a resistor in parrilel Sp?  and then rebent the float and they were a lot better it is a very nicely made unit   just my .02  Tom

Russ67Scode

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Re: RobbMc sending unit or sump?
« Reply #3 on: May 27, 2018, 07:09:20 AM »
I have one in my 67 mustang works great and my gas gauge was right on
Would not hesitate to buy one again
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TomP

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Re: RobbMc sending unit or sump?
« Reply #4 on: May 28, 2018, 10:51:26 AM »
Welding a sump on a tank that has ever has gas in it is a risk. Then it also flakes the galvanizing off and clogs the filter.

scott foxwell

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Re: RobbMc sending unit or sump?
« Reply #5 on: May 28, 2018, 05:48:13 PM »
Thanks guys. This is a brand new tank, so the dilemma. I went ahead and ordered the 1/2" sending unit. I can deal with the gas gauge. Thanks again for the input!