Rear mounted fuel tank

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tgreese
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Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Rear mounted fuel tank

Post by tgreese »

You can always add a second gauge for the aux tank, if the sender does not work with the factory gauge. That seems like a more sensible addition than a convertor. I've thought about how to convert resistance ranges, and I think you could do it with a transistor and a few resistors. The difficulty would be the development time you'd need to make the circuit.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
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HeavyMetalThunder_81
Posts: 740
Joined: Sat Mar 17, 2012 5:01 pm
Location: Haze Gray

Re: Rear mounted fuel tank

Post by HeavyMetalThunder_81 »

tgreese wrote:You can always add a second gauge for the aux tank, if the sender does not work with the factory gauge. That seems like a more sensible addition than a convertor. I've thought about how to convert resistance ranges, and I think you could do it with a transistor and a few resistors. The difficulty would be the development time you'd need to make the circuit.
My rear tank setup will be completely replacing my factory fuel tank. I am liking the late '80s-early '90s Ford Econoline van rear tanks. Their sending units match up with our '73-'85 gauges, have in tank fuel pumps to work with my soon-to-be Holley fuel injection, and hopefully fit where the factory spare tire would go.
-Jonny B.
1979 Cherokee Golden Eagle - UNDER CONSTRUCTION
7" lift, 35x12.5x15
AMC 401 - Pro-FLo 4 FI
NV4500/NWFBB/NP205 - Triple Stick'd
F D44 - 4.10, Eaton E-Locker
R M23 - 4.10, Detroit Locker

1979 Cherokee Chief - Parts
1979 Cherokee Chief - Parts
1979 Wagoneer - Sold
1981 Cherokee Chief - Cubed
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tgreese
Posts: 7118
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Rear mounted fuel tank

Post by tgreese »

IIRC the in-tank pump for these applications is low pressure, and must be supplemented by a high pressure pump mounted externally. Look at the listings and you'll see two pumps for a single application.

Not a problem, but a little more complicated than the in-tank Chevy or Jeep setup.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
User avatar

HeavyMetalThunder_81
Posts: 740
Joined: Sat Mar 17, 2012 5:01 pm
Location: Haze Gray

Re: Rear mounted fuel tank

Post by HeavyMetalThunder_81 »

tgreese wrote:IIRC the in-tank pump for these applications is low pressure, and must be supplemented by a high pressure pump mounted externally. Look at the listings and you'll see two pumps for a single application.

Not a problem, but a little more complicated than the in-tank Chevy or Jeep setup.
You are correct. But the pumps mounted to those sending units are standard semi-universal pump. My plan is to swap it out with a higher pressure model from Walbro or Aeromotive.
-Jonny B.
1979 Cherokee Golden Eagle - UNDER CONSTRUCTION
7" lift, 35x12.5x15
AMC 401 - Pro-FLo 4 FI
NV4500/NWFBB/NP205 - Triple Stick'd
F D44 - 4.10, Eaton E-Locker
R M23 - 4.10, Detroit Locker

1979 Cherokee Chief - Parts
1979 Cherokee Chief - Parts
1979 Wagoneer - Sold
1981 Cherokee Chief - Cubed
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