205 Engine Modernisation
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Thread: 205 Engine Modernisation

  1. #1
    Fellow Frogger! flock's Avatar
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    Default 205 Engine Modernisation

    I'm about to get another 205 so I will be taking my engine out of my , throwing the jetronic in the bin and deleting the distributor. In the meantime I am gathering some bits and making up a new loom for an aftermarket ecu. It's an Xu9j1 Dfz, and I am fed up with vacuum leaks, distributor woes, poor idling and general lack of easy tuning for future upgrades.

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    My list of parts I think i need is:
    - Motronic flywheel
    - Crank sensor
    - Si or 306 coil pack/leads and distributor blanking plate
    - MAP sensor taking the vacuum from intake manifold
    - Analogue Tps sensor
    - Air temp sensor
    - IAC
    - Keep narrowband 02 sensor

    Stage 2 will be an Si head, bottom end rebuild among other stuff but that is for another day.

    How am I going so far is there anything I am missing? Have never done anything like this before.

    Lach






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  2. #2
    1000+ Posts schlitzaugen's Avatar
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    What is the advantage of the Motronic flywheel?
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Fellow Frogger! flock's Avatar
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    Quote Originally Posted by schlitzaugen View Post
    What is the advantage of the Motronic flywheel?
    So I can get the RPM and crank position instead of relying on the distributor. I assume the Si flywheel would work just the same not sure what tooth pattern it is.

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    Last edited by flock; 5th January 2017 at 03:26 PM.

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    Si flywheel exactly the same.

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    I have an S3 flywheel that will meet your needs as long as you stay xu9 and be1 or be3, this will be fun.
    87 S1 205 GTI / GTI6 powered a project underway
    306 convertible (gti6 candidate)
    307 HDi wagon
    407 HDi wagon

  6. #6
    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by flock View Post
    So I can get the RPM and crank position instead of relying on the distributor. I assume the Si flywheel would work just the same not sure what tooth pattern it is.

    Sent from my E6653 using aussiefrogs mobile app
    You know that has a 60-2 tooth pattern, right?
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Fellow Frogger! flock's Avatar
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    Quote Originally Posted by schlitzaugen View Post
    You know that has a 60-2 tooth pattern, right?
    Is this a problem?

    Sent from my E6653 using aussiefrogs mobile app

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    Fellow Frogger! flock's Avatar
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    Quote Originally Posted by Matthew View Post
    I have an S3 flywheel that will meet your needs as long as you stay xu9 and be1 or be3, this will be fun.
    I will take you up on that offer hopefully my big box of series 1 goodies will be of use to you

    Sent from my E6653 using aussiefrogs mobile app

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    Come on round this afternoon, happy to pass it on.

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    1000+ Posts PeterT's Avatar
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    I'd be getting a wide band sensor & controller. They're relatively cheap now and you will save on dyno time being able to tune it yourself.

    Also verify your gearbox has a Motronic mounting hole. Early BE1's don't.
    Last edited by PeterT; 6th January 2017 at 01:48 PM.

    '92 205 Mi16
    '90 Mi16x4

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    Fellow Frogger! flock's Avatar
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    Quote Originally Posted by PeterT View Post
    I'd be getting a wide band sensor & controller. They're relatively cheap now and you will save on dyno time being able to tune it yourself.

    Also verify your gearbox has a Motronic mounting hole. Early BE1's don't.
    Just saw a kit for $179 with sensor, controller, wiring and bung. Might get lucky and the sensor will fit the thread.

    Do you mean the crank sensor mounting hole shaped like this?



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    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by flock View Post
    Is this a problem?

    Sent from my E6653 using aussiefrogs mobile app

    Only if you want to use aftermarket electronics that do not read the 60-2 tooth pattern.
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Fellow Frogger! flock's Avatar
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    Quote Originally Posted by schlitzaugen View Post
    Only if you want to use aftermarket electronics that do not read the 60-2 tooth pattern.
    A, perhaps controversial, ECU I am looking at integrating is a Speeduino. It has all the features I am looking for and will support everything mentioned so far, just need to add a VR conditioner and wideband O2 controller.

  14. #14
    1000+ Posts PeterT's Avatar
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    I use a Haltech controller in my 205. The controller module is tiny and the 0-5V output goes straight into the ECU. It's also very quick to warm up, so it's working before you're out of the driveway.

    '92 205 Mi16
    '90 Mi16x4

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    Quote Originally Posted by flock View Post
    A, perhaps controversial, ECU I am looking at integrating is a Speeduino. It has all the features I am looking for and will support everything mentioned so far, just need to add a VR conditioner and wideband O2 controller.
    They do a VR conditioner , two of them actually and an Innovate WBO2 will do the trick. I can show you mine which is planned for the car at some stage, after a megasquirt goes in.
    87 S1 205 GTI / GTI6 powered a project underway
    306 convertible (gti6 candidate)
    307 HDi wagon
    407 HDi wagon

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