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Next project: Steering

Discussion in '456/550/575' started by fatbillybob, Oct 9, 2011.

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  1. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,017
    socal
    #1 fatbillybob, Oct 9, 2011
    Last edited by a moderator: Sep 7, 2017
    I think our 550 use servotronic as I have seen the servotronic ECU in the car and the hydralic transducer sticking off the steering rack which is ZF #7823.998.103 .

    1. Electronic speedometer in the vehicle
    2. Electronic control unit (ECU)
    3. Electro-hydraulic transducer
    4. Rack and pinion power steering gear
    5. Steering pump
    6. Oil reservoir with fine filter
    7. Anti-vibration expansible hose
    8. Manually adjustable steering column

    The FHP ECU is about 1000USD. I'm sure we can figure out the servotronic output for pennies and home brew our own better than FHP ECU's. What do you guys think?
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  2. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,017
    socal
    #2 fatbillybob, Oct 9, 2011
  3. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,438
    #3 360modena2003, Oct 9, 2011
    Does the 456GT also have this?

    Thank you
     
  4. 166&456

    166&456 Formula 3

    Jul 13, 2010
    1,723
    Amsterdam
    #4 166&456, Oct 9, 2011
    Yes they have the same system.
     
  5. deetee

    deetee Karting

    Jul 4, 2011
    87
    Tokyo, Japan
    Full Name:
    Takashi
    #5 deetee, Oct 9, 2011
    FBB, don't know if this affects your analysis, but I purchased a FHP steering ECU (part #175891) for my 456M two weeks ago from Maranello, their price was GBP313, which is significantly less than USD1000 (but which is also far higher than your pennies target).
     
  6. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,438
    #6 360modena2003, Oct 9, 2011
    Interesting. Where is this ECU located?

    Does it just work a pressure valve?

    Could someone explain how it works?

    Thank you
     
  7. henryr

    henryr Two Time F1 World Champ
    Silver Subscribed

    Nov 10, 2003
    22,414
    Atlanta
    Full Name:
    Juan Sánchez Villa-L
    #7 henryr, Oct 9, 2011
    the 550/575/456 all use the same part ?

    what happens if you just remove the ECU and run without ?
     
  8. deetee

    deetee Karting

    Jul 4, 2011
    87
    Tokyo, Japan
    Full Name:
    Takashi
    #8 deetee, Oct 9, 2011
    I have some info. re. the "where."

    On a 456M, location 12:
    http://www.ricambiamerica.com/parts_catalogs.php?V=diag&I=970

    On a 550, location 10:
    http://www.ricambiamerica.com/parts_catalogs.php?V=diag&I=385

    On a 575M, location 33:
    http://www.ricambiamerica.com/parts_catalogs.php?V=diag&I=1157

    Some F-chat threads:
    http://www.ferrarichat.com/forum/showthread.php?t=318747
    http://www.ferrarichat.com/forum/showthread.php?t=156067&page=5
     
  9. 166&456

    166&456 Formula 3

    Jul 13, 2010
    1,723
    Amsterdam
    #9 166&456, Oct 9, 2011
    Last edited: Oct 9, 2011
    If you run without, it will go to the 'high speed' setting, which basically means heavy steering at parking and city speeds. The only thing the unit does is regulate the steering oil pressures relative to the speed of the car and the steering angle. The PDF as posted explains it better than I ever could or am willing to pen down ;)

    I do not believe they are the same between the models. Personally I really like the steering on my (old model) 456 and would not change anything about it. But then again I have never driven a car with FHP.
     

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