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Thread: 94 RRC soft dash Chev conversion

  1. 25th January 2012, 03:16 PM #1
    theg
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    94 RRC soft dash Chev conversion

    My 3.9 has a cracked block ! I have a full conversion kit for a small block chev into Rangie , mounts , adapter plate etc etc . With some custom mod parts I can fit this 350 Injected motor to the ZF auto in the car no problems .
    Wonder about all the High tek original gear though, like cruise control function etc etc .
    Worried about the original computers functions once disconnected from the motor .
    What engine sensors pass info through the computer for other functions like air con etc etc .
    There is no air suspension its been removed .
    Chevy is complete including its own loom , sensors and engine management computer .
    I know about power considerations for the transmission and am prepared to give consideration to the box strength with the driving style .
    Would i be able to custom mount the original cruise control equipment to the throttle body on the chevy . What sensors does the cruise cont use in its function ?
    Probably need to adapt Chevy cruise control to the rangie control switch .Something must sense road speed (computer)
    Suspension I will upgrade for the weight .
    Anyone got any tips or info .
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  2. 25th January 2012, 03:21 PM #2
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    Scouse
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    The cruise control is the least of your problems.

    It's only hooked up mechanically at the throttle.
    I'm not exactly sure where it gets it's signal from but it's not from the engine. It might be from the ABS (wheel speed sensors) or the transfer case (speedo transducer).

    The tacho might need some working out as it gets it's signal from the alternator. I'm sure others here have overcome that though.
    Scott
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  3. 25th January 2012, 03:29 PM #3
    theg
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    Hey Scott .
    Cruise control and the original computer functions are what worries me most .
    Once Its not gathering info from all its sensors any more Im wondering what other functions in the car will be disabled .
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  4. 25th January 2012, 03:47 PM #4
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    Scouse
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    The Classics had very few (if any) critical sensors from the engine to the rest of the car.
    Nothing like the P38a where it's linked to the rest of the car anyway.
    Scott
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  5. 25th January 2012, 04:07 PM #5
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    rovercare
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    Quote Originally Posted by Scouse View Post
    The Classics had very few (if any) critical sensors from the engine to the rest of the car.
    Nothing like the P38a where it's linked to the rest of the car anyway.
    What he says, tacho signal which is easily resolved, nothing else interfaces, 14cux on the rover is quite primitive
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  6. 25th January 2012, 04:10 PM #6
    theg
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    The 94 soft dash was the prelude to the p38 and has a lot of the same gear like air susp , abs air bag and traction control .
    I will read as much info on the workshop manual before i attempt this conversion to minimise the number of surprises throughout the conversion fittment .
    Ive got a set of chev into rangie extractors aswell and can weld in the o2 sensor threaded fittings for the chevy .
    Havnt much thought about catalytic converter yet . Would there be one in the original rangie 3.9 fittment . Havnt looked under it !
    Just writing things down here as they come to mind .
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  7. 25th January 2012, 04:14 PM #7
    theg
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    original ecu

    Do you guys think the original ecu is not responsible for any other functions than engine management . If so I could simply remove it and wire in the chev one from scratch .
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  8. 25th January 2012, 05:13 PM #8
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    Quote Originally Posted by theg View Post
    Do you guys think the original ecu is not responsible for any other functions than engine management . If so I could simply remove it and wire in the chev one from scratch .
    Just do that.
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  9. 25th January 2012, 05:42 PM #9
    theg
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    Just had a bit of a read up on the cruise control .
    Components are controlled by a separate cruise control ECU . There is a speed sensor mounted on the side of the transfer box which sends data to both the engine control module and the cruise control ECU . Also the electronic speedometer .
    I think I can work out how to retain the cruise control with this info now at hand .
    Just need to fabricate a mounting system to suit the existing rover cruise control throttle linkages onto the chev throttle body .
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  10. 25th January 2012, 07:57 PM #10
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    Casper
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    Look up some of Rovercares projects, there are a few V8 conversions there, one in a Disco if I remember correctly.

    I have seen Rags' Rangie with a Gen 3 in it and he got it going so it can't be too hard ( :

    He has had the trans modded though to take a bit of a pounding as it's a comp rig so maybe talk to him as well.

    I wouldn't worry too much about your cruise, that stuff is easy to sort out, ABS will be separate as well as your airbags etc.

    I would go with the Chev computer and get rid of the Rover one as they wont made to work together easily.

    Look up the past projects as most of your questions will be answered in those threads.

    Cheers Casper
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