355 - Euro F355 ECU | FerrariChat
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355 Euro F355 ECU

Discussion in '348/355' started by ShineKen, Oct 18, 2021.

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  1. ShineKen

    ShineKen F1 World Champ
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    #1 ShineKen, Oct 18, 2021
    Spoke to GTO Engineering last week regarding an ECU "mod," which I didn't quite understand. They said the only difference between a Euro and U.S 355 ECU is the Euro version doesn't have the "ground" wire plugged in and the U.S version does. My buddy had them do the mod. I guess they just unplug or snip a wire and tidy it up. Car does seem to run fine and very smooth btw.

    Electrical is certainly not my forte. Anyone have a clue what they are referring to?

    @johnk...
     
  2. Qavion

    Qavion F1 World Champ
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    #2 Qavion, Oct 18, 2021
    No idea. 5.2 car?

    I can't find any Motronic wiring differences between Euro and USA other than:

    No 3rd thermocouple ECU wiring on Euro car (but it's a signal wire, not an earth wire).
    Additional OBD2 wiring on USA (but no extra ECU pins used as far as I can see on the USA car)

    The only earth wire I can see goes to a splice which hooks up to the main engine earth on the engine block. I can't see the car working too well without that. Anyway, both Euro & USA diagrams show the same wiring for this.
     
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  3. ShineKen

    ShineKen F1 World Champ
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    #3 ShineKen, Oct 18, 2021
    2.7 car
     
  4. Qavion

    Qavion F1 World Champ
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    #4 Qavion, Oct 18, 2021
    Last edited: Oct 18, 2021
    (EDIT) The USA 2.7 car has an extra orange-blue wire attached to each ECU (pin 39) which goes to an earth via a splice.

    No idea what it does. It's a big wire, so not likely a pin-programming wire.

    Does anyone have a pinout for the 2.7?
     
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  5. ShineKen

    ShineKen F1 World Champ
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    #5 ShineKen, Oct 18, 2021
    That might be what they are referring to.
     
  6. Qavion

    Qavion F1 World Champ
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    #6 Qavion, Oct 18, 2021
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    Wire marked in magenta, rather than orange/blue.

    They probably just added an earth wire close to each ECU rather than cutting into the harness to find the earth splices.
     
  7. ShineKen

    ShineKen F1 World Champ
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    #7 ShineKen, Oct 18, 2021
    This is all foreign to me. What does it all mean? Performance benefits?
     
  8. Targatime

    Targatime Formula 3

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    #8 Targatime, Oct 18, 2021
    No, just reliability.
     

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