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Thread: Gas tank question

  1. #1


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    1989 Mitsubishi Mighty Max
    Engine

    4G63-T

    Gas tank question

    Since I can't find a gas tank on here for sale, and locally wants an outrageous price, I found "Replacement Fuel Tank (P670120)" for the first gen mightymax. Is this compatible with the second gen? I do not have a comparison so need insight.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

  2. #2


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    1991 Mitsubishi Mighty Max
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    4G64
    it isnt a direct swap. ive looked in the same direction you are..

  3. #3



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    it is definately not the same - I have changed tanks in both and the mounts to the fittings are all different. The 1st gen the hoses go directly to the pipes on the tank with a separate sending unit. the 2nd gen tank the hoses and sending unit are all together in one place on the side of the tank for the carbed version. The 2nd gen FI tank the pump and hoses come out of the top and the sending unit is on the side. The 1st gen also had a set of expansion tanks on the top of the tank for evap purposes. I would think you could make a 1st gen tank work, but you have to have a 1st gen sending unit for it; the only person I know that has new ones is Mike Warme. New mounts would have to be made to match the new bolt pattern of the 1st gen tank. When the tank went bad on my 88 ext cab, I looked at this swap too, but found a truck with a new tank in a upullit for 45 bucks, and went with it instead.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  4. #4


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    1989 Mitsubishi Mighty Max
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    Thanks for the heads up. The local yards are charging a price I could buy a brand new fuel cell. I'll just keep lurking the classifieds.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

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