How to get lots of extra horsepower for free on 456 | FerrariChat

How to get lots of extra horsepower for free on 456

Discussion in '456/550/575' started by Ferrarienthusiast71, May 15, 2024.

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  1. Ferrarienthusiast71

    Ferrarienthusiast71 Formula Junior
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    Sep 13, 2023
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    Charlie
  2. franschman

    franschman Formula Junior

    Dec 18, 2017
    362
    Holland
    Full Name:
    Bart
    Set the cable to the pedal right, then use two Ohm-meters measuring resistance of both throttle bodies to set the second cable. Resistance of both bodies should be identical over the entire range.
    I found especially the moment of opening of both butterflies, at very low throttle, the most critical. They should open at exactly the same time.
     
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  3. Aerosurfer

    Aerosurfer Formula 3
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    Nov 21, 2020
    1,884
    Indianapolis
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    Nick
    Excellent! I have read the WSM for that section and your summary made it much clearer. Did you just use 2 multimeters connected to the potentiometer on each side? Then just work the pedal and adjust the cable as necessary?
     
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  4. franschman

    franschman Formula Junior

    Dec 18, 2017
    362
    Holland
    Full Name:
    Bart
    Yes. (twice). I actually made a simple tool with some tube and rod end, supported to the seat, with which I could press the pedal mm by mm and see what happened with the throttle body resistances.
     
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  5. Timmo

    Timmo Formula Junior

    Aug 26, 2017
    680
    Continental Europe
    As I have only one multimeter I focused on the balance near the fully closed and fully open positions and it worked well. What required most focus was to get both throttle bodies to close exactly at the same time by adjusting the center cable.
    Adjustments were all over the place when I got the car and the RHS throttle body would not even close properly as the center cable did not slide freely in its tube anymore... something that didn't seem to bother the last Ferrari dealership that serviced the car. Lol.
     
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  6. Ferrarienthusiast71

    Ferrarienthusiast71 Formula Junior
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    Who has the most horsepower on their 456?
     

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