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Thread: Making a P38 2WD (possible sacrilege)

  1. 4th January 2011, 11:17 AM #1
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    Making a P38 2WD (possible sacrilege)

    Hi All

    I realise that the P38 is a full-time 4wd vehicle, designed that way for a reason etc, but if one is a daily drive and always on roads, is there a way to easily disconnect the drive to the front end?

    I mean, if you were going to drive Bris to Melb and back on the highway, wouldnt it save a lot of juice? Perhaps this would have dire effects wrt to the viscous coupling etc.

    Just wondering - now ducking
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  2. 4th January 2011, 11:47 AM #2
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    Complete waste of time and effort.

    Miniscule fuel saving not worth the massive $$ to be spent converting to part time 4WD, not to mention the handling issues and diff strength issues.
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  3. 4th January 2011, 12:06 PM #3
    BusinessConnected
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    Be much better off spending around 2500 (what I spent) getting Sequential Gas Injection running...
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  4. 4th January 2011, 12:17 PM #4
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    As BigJohn suggests.

    The p38a was designed to share the vehicle weight over 2 diffs. If you transfer all the load to one p38a diff, which already have a reputation for failure, you are likely to end up with a no-wheel drive. The cost of the tow back home will be more than any potential savings, not to mention the reduction of road manners of a 2WD with a high centre of gravity.

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.
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  5. 4th January 2011, 12:57 PM #5
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    No-wheel-drive sounds crap

    Thanks for the info. Speaking of gas as per below, I have dual fuel and it is running well, although I am constantly fearful of my LPG backfiring if I plant my accelerator because I have the non-sequential type system I believe. Since I already have all the plumbing and tank etc, how much effort is involved in the upgrade to the sequential version? Anyone care to guess?

    I will check the brand and type of mine tonight.
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  6. 4th January 2011, 01:41 PM #6
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    Quote Originally Posted by glenhendry View Post
    No-wheel-drive sounds crap

    Thanks for the info. Speaking of gas as per below, I have dual fuel and it is running well, although I am constantly fearful of my LPG backfiring if I plant my accelerator because I have the non-sequential type system I believe. Since I already have all the plumbing and tank etc, how much effort is involved in the upgrade to the sequential version? Anyone care to guess?

    I will check the brand and type of mine tonight.
    If you want an economical wagon, buy a dunnydoor or a BF foul can.

    Sequential V8 under bonnet kit (in Aust) is around $1800 plus say $600-800 fitting. Marrelli kits from UK ebay are cheaper, a couple of people here have done it.
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  7. 4th January 2011, 01:50 PM #7
    BusinessConnected
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    Marelli Kit from the UK is what I'm running... after going through some minor "hiccups" to begin with it's now working brilliantly (Car runs better on Gas than Petrol).

    Kit would cost around $1000 AU Landed from the UK at the moment... Installation would probably be around $800-1000 for just under bonnet. (Some work is involved in Soldering Connectors around Reversed ete to Suit Range Rover Setup ete).
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  8. 10th January 2012, 07:32 AM #8
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    This is the LPG ECU I have. Anyone care to comment on its upgradability to sequential injection?
    Now: 2005 L322 Vogue 4.4 M62TU (Black)
    Before: 2000 P38A HSE 4.6 - stately capability | 2008 Kluger KX-S | 2004 Forester | 2000 Yamaha XJR1300 | 1993 VR Calais | 1974 HQ Statesman - 308 V8 | HT | HK
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  9. 10th January 2012, 08:56 AM #9
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    Quote Originally Posted by glenhendry View Post
    This is the LPG ECU I have. Anyone care to comment on its upgradability to sequential injection?
    1. Remove it. Bin or ebay to get rid of it.
    2. Replace with injection kit.
    3. Pay for it.

    That was easy, now all you have to do is to choose between 20 different brand of injection equipment. Can't help you there. Cost vs reliability? Set your budget and see how you go.
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  10. 16th January 2012, 09:18 PM #10
    redandy3575
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    I double that, definetaly get rid of the older mixer type system before you fry the heads. Range Rover P38 V8s where never designed or meant to run on the mixer system, they're a recipe for disaster,trust me.

    I've heard of 3 various cases of cylinder head warpage and meltdown of the valves from the mixer systems, mainly because their owners haven't done the research and asked questions from qualified Land Rover mechanics who just about all don't recommend them for the P38's, the earlier models maybe, but no P38's. At least with the injector, you have a much more accurate and conservative LPG intake. Though i myself haven't gone down that road yet, but if i did, that's what i'd get, plus spend the extra $100 for the head oil injection for extra lubrication of the valves.
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