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A GENUINE KIND of gear replacement for 63307100 f355 timing actuator

Discussion in '348/355' started by vincentf355, Sep 16, 2024.

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  1. vincentf355

    vincentf355 Karting

    Feb 24, 2010
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    vincent tseng
    #101 vincentf355, Jul 28, 2025
    I looked back what I posted earlier in this thread, there should be 5 wires since it is a 5 pin potentiometer for a very common actuator across many brands like VAG, Fiat, etc.

    However, even with 5 wires, still not sure if it functions the same as original 63307100 potentiometer?

    [​IMG]
     
  2. vincentf355

    vincentf355 Karting

    Feb 24, 2010
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    vincent tseng
    #102 vincentf355, Jul 30, 2025
    Last edited: Jul 30, 2025
    FYI I just got the confirmation with a photo from one of the vendors I had checked.

    5 wires. Partially putting together a puzzle!

    Image Unavailable, Please Login
     
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  3. Qavion

    Qavion F1 World Champ
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    Ian Riddell
    #103 Qavion, Jul 31, 2025
    You'd have to check the range of motion and the shape/size of the drive. I'm not sure about the potentiometer value. The ECU may be able to calculate the resistance range, but I guess it would depend on whether the pot was linear or logarithmic.
     
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  4. m.stojanovic

    m.stojanovic F1 Rookie
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    Miroljub Stojanovic
    #104 m.stojanovic, Aug 1, 2025
    Last edited: Aug 1, 2025
    Yes, the actuator's range of motion is important, i.e. it would need to be similar to that of the original actuator. As for the potentiometer, the AC ECU does not work with the pot's resistances but with the voltages it receives from the pot's middle pin. Being a voltage divider, a potentiometers will, for a given fixed voltage at its end pins, produce the same voltage on its middle pin for various rotational positions irrespective of whether it is a 5K or 10K or 100K potentiometer.

    Otherwise, potentiometers in actuators are always linear. The logarithmic pots were developed mainly for the volume control on amplifiers to be in line with the human hearing which is logarithmic.
     
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