328 speedo | FerrariChat

328 speedo

Discussion in 'Technical Q&A' started by Prugna 328, Feb 3, 2004.

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  1. Prugna 328

    Prugna 328 Formula 3

    Sep 10, 2003
    1,233
    L.I.N.Y.
    Full Name:
    Gregory
    #1 Prugna 328, Feb 3, 2004
    My 328 speedo seems to be very optimistic. Is this common? I never checked it out exactly but I would say it reads about 80 when I'm doing 60. Tires are correct size.
     
  2. Tod328gts

    Tod328gts Formula Junior

    Jul 23, 2003
    626
    River Forest, IL
    Full Name:
    Tod Whitmore
    #2 Tod328gts, Feb 4, 2004
    I had that same delima with mine, but it was me... I took my hand held GPS and verified the speedo was correct and it was. My next step was going to borrow my friends radar gun and check it against that...

    Even though, twice last summer, i did have an instant jump in the speedo. I saw some threads about that, luckily it hasn't done that again....
     
  3. snj5

    snj5 F1 World Champ

    Feb 22, 2003
    10,213
    San Antonio
    Full Name:
    Russ Turner
    #3 snj5, Feb 4, 2004
    Many Ferrari speedometers are as much as 10% optimistic.
    A close approximation trick in 5th gear is to double the tach reading.
     
  4. KurtK328

    KurtK328 Formula Junior

    Mar 6, 2001
    347
    Villeneuve-Loubet, France
    Full Name:
    Kurt Kjelgaard
    #4 KurtK328, Feb 4, 2004
    You mean 8ooo km/h at 4000 RPM ;-)
     
  5. Mark 328

    Mark 328 Formula Junior

    Nov 6, 2003
    510
    Orange, Ca
    Full Name:
    Mark Foley
    #5 Mark 328, Feb 4, 2004
    A while ago there was another thread on this subject and it seems that in the USA speedos can be off +/- X%, but in Italy, speedos can not read any lower and I think they said they can read up to 10% higher. The rational was based on liability; theoretically it would be hard to blame the speedo in an injury accident if it read too high.
     
  6. Chiaro_Slag

    Chiaro_Slag F1 Veteran

    Oct 31, 2003
    7,789
    CA
    Full Name:
    Jerry
    #6 Chiaro_Slag, Feb 4, 2004
    Tried that today in the 328 - Worked great! ~70 at 3500 and ~80 at 4000.

    Thanks!
     
  7. godabitibi

    godabitibi F1 Veteran
    Silver Subscribed

    Jan 11, 2012
    6,275
    Papineauville, Quebec
    Full Name:
    Claude Laforest
    #7 godabitibi, Jun 18, 2023
    Miles ? Or kilometers ?
     

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