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Thread: Engine swap

  1. 6th June 2023, 09:06 PM #1
    Bwoehl
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    Engine swap

    i am looking at swaping a 1991 3.5liter hotwire disco engine into my 1985 rrc. has anyone done this before?
    what are some major problems i will come across if there are any? i imagine its pretty straightforward but just incase

    Ben
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  2. 6th June 2023, 09:20 PM #2
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    V8Ian
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    Should be pretty straightforward, especially if you have a running donor.
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  3. 7th June 2023, 06:19 AM #3
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    Homestar
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    As mentioned if you have a donor vehicle so you can grab anything you’re short of it should be a straight swap. I went from carby to a 14CUX 3.9 in mine and it was pretty straightforward.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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  4. 7th June 2023, 10:36 AM #4
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    DoubleChevron
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    wouldn't it be a 3.9 if its hotwire efi ? I thought the 3.5s had issues and were the old AFM type injections.
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  5. 7th June 2023, 10:48 AM #5
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    loanrangie
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    Quote Originally Posted by DoubleChevron View Post
    wouldn't it be a 3.9 if its hotwire efi ? I thought the 3.5s had issues and were the old AFM type injections.
    D1 had hotwire but early RRC 3.5 had the old flapper system.
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  6. 12th June 2023, 07:15 PM #6
    Patrick M
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    Engine Swap

    I swapped my 3.5 hotwire from my 1991 D1 into my 1986 rangie, though I only changed over the inlet manifold and everything attached to it, it all worked really well, once I got the right tune settings on the AFM, Ignition timing and TPS.
    You will probably find it a lot easier with swapping over the whole engine as long as it is in good running nick.
    The things to make sure of are that you also swap over the Road Speed Transducer and infact any of the sensors attached to the 14 CUX system which is pretty obvious.
    I also got rid of the original fuel pump and purchaded a more reliable type unit from a specialist fuel injection mob in Melbourne and carried another with me as a spare. I never needed it tjough even after three or four years.
    The ECU is supposed to have a Auto Trans or Manual Trans imput selection to it but if you are going from auto trans to auto trans or manual to manual then you shouldn't have a problem.
    With the wiring harness of the 14 CUX you may find it a bit short to mount the ECU on the right side kick panel where it was mounted in my D1 but I just mounted it on the driver side panel where the brake and clutch pedals hang through.
    The whole thing was a pretty basic job really just required a bit of time and patience.
    Regards:-
    PatrickM
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