BJ-42 top speed?

Discussion in '40- & 55-Series Tech' started by landcrusher81, Jul 2, 2005.

  1. landcrusher81

    landcrusher81

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    my truck tops out at 100kph, is this normal?
    What options do i have to improve top speed. 120 would be nice. I am fairly handy, but don't have any experience with fabrication.
    thanks for the advice
     
  2. brownbear

    brownbear Mod in Hibernation Moderator

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    wrong forum! try the international side. they are the diesel experts.

    could be fuel adjusments.

    gear ratio's

    brakes dragging.

    but defiantely talk to the guys in international. welcome to the board. I have a BJ60. they don't go to fast. but 115 I can hit without a problem. 120 after a while. so your light BJ42 should hit 120 with out too much fuss.
     
  3. bj42turbo

    bj42turbo

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    On flat level ground no wind 110 to 120 with 4 speed, head wind slight uphill 90km pre turbo

    Dazz
     
  4. dieseldog

    dieseldog She idles just fine . . .

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    Do you have a five-speed or the four-speed? That will make a HUGE difference.
     
  5. dingdong

    dingdong

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    1982 BJ-42 with H55F, 33x9.5 BFG MT's, otherwise stock.
    110 kph in 5th gear is my cruisers happy place.
    This is on flat ground, no wind.
    Speed checked on GPS (speedometer reads a little low).
     
  6. landcrusher81

    landcrusher81

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    It has a 4 speed with 31s
    H55F is a expensive upgrade, does anybody know of a cheaper allternative?
     
  7. dieseldog

    dieseldog She idles just fine . . .

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    H55F is one of THE most cost-efficient upgrades anyone can ever do on a Land Cruiser. I have never heard of a person who made the conversion who was unhappy afterwards.
     
  8. 74fj40

    74fj40

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    supposedly with 33 and 4.11 gears you an go 110-120kph eaisly
     
  9. dingdong

    dingdong

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    The cheapest upgrade would be taller tires, assuming your current suspension is fresh stock, or lifted, you should be able to stick some skinny 33's on there.
    Your diffs are probably 4.11, so a switch to 3.73 would get you higher gearing. 3.73 are pretty cheap to come by since everyone is trying to get rid of theirs. I guess that would be the cheapest way to go but you will probably regret it later.
    An H55F is not that pricey. Find yourself a later model BJ60. They go pretty cheap these days because they are all rusted out and because of all the nice clean JDM units available. I see BJ60's in the $2500 CAD all the time. That gets you an H55F and appropriate transfer case, a spare motor, and a bunch of other stuff. Part out what you can.
    When I put the H55F in my BJ42, I was very happy. The best upgrade for me was power steering. I did a 2.5 inch lift, 5 speed, power steering, and 33 inch tires. It makes for a nice BJ42. Next up, Gozzard body and electric locker in the rear.
     
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