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Thread: Isuzu History

  1. 4th January 2012, 05:16 PM #1
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    Isuzu History

    Hi All,

    Been a (long) while since I have got back to posting some info. The attachments are original correspondence from Isuzu Japan regarding 4BD1 for the Army.

    Most of the info in the attached pdf's is common knowledge these days and probably represented in a different form elsewhere on AULRO but thought it worth sharing for history sake. Apologies for the quality of some pages, they are from the original fax copies.

    Some of you may find it useful, others interesting. Enjoy
    Attached Files Attached Files
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  2. 4th January 2012, 05:35 PM #2
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    How great is that. Thanks heaps.

    Diana

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.
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  3. 5th January 2012, 06:27 PM #3
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    Thanks!

    The dates on those documents are 1988. '89, '94 and '94. So obviously much later than the perentie development. However there was a 2nd batch of perenties ordered ~1994(?).

    The first 4BD1 engined landie appeared in 1982ish, and the perentie prototypes were completed by the mid 80's(?).

    Surely JRA would have given the army full specs at time of delivery?
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  4. 5th January 2012, 06:44 PM #4
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    Quote Originally Posted by isuzurover View Post
    Thanks!

    The dates on those documents are 1988. '89, '94 and '94. So obviously much later than the perentie development. However there was a 2nd batch of perenties ordered ~1994(?).

    The first 4BD1 engined landie appeared in 1982ish, and the perentie prototypes were completed by the mid 80's(?).

    Surely JRA would have given the army full specs at time of delivery?
    Ben

    I think you will find that it was the 6X6 development which happened later than the 4X4 at least for the LRPV variant.

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.
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  5. 5th January 2012, 07:48 PM #5
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    it also ties in with a bunch of parts rodums after engines hitting the rebuild point were found to have cracked pistons.
    Dave

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  6. 5th January 2012, 08:29 PM #6
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    Quote Originally Posted by isuzurover View Post
    Thanks!

    The dates on those documents are 1988. '89, '94 and '94. So obviously much later than the perentie development. However there was a 2nd batch of perenties ordered ~1994(?).

    The first 4BD1 engined landie appeared in 1982ish, and the perentie prototypes were completed by the mid 80's(?).

    Surely JRA would have given the army full specs at time of delivery?
    Quote Originally Posted by Lotz-A-Landies View Post
    Ben

    I think you will find that it was the 6X6 development which happened later than the 4X4 at least for the LRPV variant.
    JRA developed the 4x4 and 6x6 side by side, but a request for more vehicles was put in (early nineties) after BAe bought Land Rover and IIRC these were assembled at a BAe factory in Sth Oz.

    The spec was a bit different to the earlier ones, ARB type bullbars, the HD front end for the 6x6, (and maybe the LRPV ?) etc.

    My mate who was ex-JRA was pretty critical of some of the design details and build quality of that build batch.
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  7. 6th January 2012, 07:18 PM #7
    Dougal
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    Great information there. It covers the upgrade from the IHI turbocharged earlier engines (like mine) to the later garrett turbocharged engines.

    Interestingly enough lower exhaust backpressure and lower charge temperatures are the main drivers. I found these same changes back when I went from the IHI RHB6 to the Garrett T25, but I assumed the radical drop in exhaust drive pressures (from 2x boost to 1.5-1 x boost) and charge temperatures (down 25C at 15psi) were because the IHI had blades that were chewed up from dust. Which it did, but it appears even in perfect condition the IHI wouldn't have done much better.
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