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Thread: gas mileage

  1. #1

    Join Date
    Dec 2006
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    Winnipeg, Manitoba
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    gas mileage

    gas is getting real expensive, I used to have a Toyota Landcruiser with a 3.5 liter 4 cyl diesel, it got 28mpg always. How about an adapter plate of some sort to mate up a diesel to a Jeep transfer case? Which leads me to another one, a good diesel motor around the 2.5 to 4 liter size. Oh yeah, that Toy was unstoppable off road due to the torque.
    84 CJ 7 304, Arb rear, 35 BFG,s with a 2 1/2 spring lift only and to many other mods to list, plus a offroad trailer also on 35 BFG,s

  2. #2

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    St.C Ohio, 43950
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    Cummins 4bt is 3.9 liter and uses an adapter to a GM pattern. But at around 800? lbs..........its one heavy motor.
    1980 CJ-5, 360 powered, T-18, Dana 20, Advanced Adapters output , 4.56's, Dana 30 frt chromoly shafts w/297 joints and Tru-Trac and M20 rear with Detroit, Superior shafts, and disc brakes and Tom Woods frt and rear shafts.........about 10k in misc aftermarket parts!

  3. #3
    Thank you from BT ULTRA TECH MASTER!!!
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    What about using a 2.8l out of a 2005 jeep liberty?
    he who dies with the most toys wins!!!
    69' amx 390 4 speed best et 11.85 @ 116mph
    VOTEBUTTON

  4. #4

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    the new 2.8 would be a sweet idea but how hard would it be to wire and how much would it cost?
    1980 CJ-5, 360 powered, T-18, Dana 20, Advanced Adapters output , 4.56's, Dana 30 frt chromoly shafts w/297 joints and Tru-Trac and M20 rear with Detroit, Superior shafts, and disc brakes and Tom Woods frt and rear shafts.........about 10k in misc aftermarket parts!

  5. #5
    Thank you from BT Tech Master Bulltear Forum
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    you could look into an old mercedes diesel and see if anyone could make an adapter for it. or if you really want a small motor look for one of the old rabbit diesels.

  6. #6
    Thank you from BT ULTRA TECH MASTER!!!
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    Wiring sucks a$$, it probably wouldent be very cost effective? the best way to go about getting a 2.8 would be to buy a salvage liberty.
    he who dies with the most toys wins!!!
    69' amx 390 4 speed best et 11.85 @ 116mph
    VOTEBUTTON

  7. #7

    Join Date
    Dec 2006
    Location
    Winnipeg, Manitoba
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    84

    gas mileage

    First off an 800 lb motor is way to heavy, and a VW diesel is prob way to small. I was told that the motor in my old cruiser was originally a shipboard generator diesel, don,t know if thats the truth but there must be many different diesels out there. The 304 prob weighs in at say 500 lbs, so something in that weight range would be ok. Doesn,t Isuzu make a couple of diesels for GM? Its just that gas is getting up around $4.50 a gallon here and I have no intention of stopping wheeling my CJ but there must be something, propane has been discussed but the tanks need to be outside the vehicle and I,m not sure if propane is much better than gas, especially where I live, we just had 2 weeks of 40 below with the windchill. An oil burner might not be a bad idea.
    84 CJ 7 304, Arb rear, 35 BFG,s with a 2 1/2 spring lift only and to many other mods to list, plus a offroad trailer also on 35 BFG,s

  8. #8
    Helpfull BT forum member Junior wrench of the Forum
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    Fort Wayne, Indiana
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    Quote Originally Posted by 76-cj7
    the new 2.8 would be a sweet idea but how hard would it be to wire and how much would it cost?
    X2!
    Wiring the computer to work correctly with all those sensors in a foreign vehicle would be a nightmare!

    This why folks typically use mechanically injected engines, like the Cummins 4BT/early 6BT; Nissan SD33T and the GM 6.2/6.5T.
    No stinking computer!
    Bryan Smith
    Fort Wayne, Indiana
    2005 Jeep Grand Cherokee Limited
    - 5.7 HEMI powered
    1982 Jeep J10
    - Progress toward road-worthiness is being made!
    1981 Jeep J20
    - Commercial flat bed - Long term Project: RUST! Long term project (RUST!)

  9. #9

    Join Date
    Feb 2007
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    DC suburbs
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    The cummins 4BT is the best choice out there for oil burners. Find them in oil bread trucks and put a NV4500 behind it.

  10. #10

    Join Date
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    Bingo!
    1980 CJ-5, 360 powered, T-18, Dana 20, Advanced Adapters output , 4.56's, Dana 30 frt chromoly shafts w/297 joints and Tru-Trac and M20 rear with Detroit, Superior shafts, and disc brakes and Tom Woods frt and rear shafts.........about 10k in misc aftermarket parts!

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