Which brake(s) locks up 1st | FerrariChat
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Which brake(s) locks up 1st

Discussion in 'Technical Q&A' started by BillyD, Aug 3, 2005.

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Which Tire(s) lock up 1st on your non ABS Ferrari

  1. Drivers front

  2. Passengers front

  3. Both front

  4. Drivers rear

  5. Passengers rear

  6. Both rear

  7. All Four!!!!!

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  1. BillyD

    BillyD Formula 3
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    Feb 28, 2004
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    #1 BillyD, Aug 3, 2005
    Just a quick poll / question as to which wheel(s) will lock up 1st on a non ABS Ferrari. The reason I ask is that after doing some work on my 308 including bleeding/replacing brake fluid I did some test panic stops & every time it was the passenger side front (no passenger) that locked up 1st. Now we're talking standing on the pedal & intentionally locking a wheel(s).
    Normal? Or should both fronts or rears lock together?
    Bill
     
  2. enjoythemusic

    enjoythemusic F1 World Champ

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    #2 enjoythemusic, Aug 4, 2005
    Bill,

    Before we uprated the 1985 308GTS QV brakes to Brembo, there was some passenger side front lockup first. It may have been attributed to that side needing bearing change. Verell helped with the Brembo front upgrade and noticed the bad bearing and we replaced it. The car now has even front lockup. Naturally you would NEVER want the rears to lock up first.

    Maybe, if you have a brake bias adjustment, you may move the bias towards the rear for rain, but stock system should ALWAYS lock up front first. If you have a side problem that is not solved by bleeding then i would check your system and have it corrected.
     
  3. racerx3317

    racerx3317 F1 Veteran

    Oct 17, 2004
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    Luis
    #3 racerx3317, Aug 4, 2005
    I would guess that it's the passenger side first because of less weight on that side. Try it with a passenger and see if the results are the same.
     
  4. ferrarifixer

    ferrarifixer F1 Veteran
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    Phil Hughes
    #4 ferrarifixer, Aug 4, 2005
    It's a lot to do with mechanical grip.....corner weight, tyre grip, shock absorber condition, anti roll bar, spring, camber, caster etc
     
  5. enjoythemusic

    enjoythemusic F1 World Champ

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    #5 enjoythemusic, Aug 4, 2005
    <Humbly bows> Excellent answer. My apologies, the car here has been corner weighted, etc BEFORE the Brembos and i had passenger lockup first (due to bad bearing is my guess). i assumed his question was IF you have an "IDEAL" and working stock setup...
     
  6. pma1010

    pma1010 F1 Rookie

    Jul 21, 2002
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    Philip
    #6 pma1010, Aug 4, 2005
    Stock 308 is light on RF as noted.

    Interestingly a friend brought his 246 GTS over on the weekend and we put it on the scales. While we did not disconnect the end links/ARBs, we did make sure the surface was level. LF = RF with 175 lb driver. Cross weights were not bad. Nice huh.
    Philip
     
  7. DGS

    DGS Seven Time F1 World Champ
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    #7 DGS, Aug 5, 2005
    I really have to stomp my 328 to lock 'em up (may need steel brake lines). Mostly both fronts lock almost together, but on most drainage-crowned roads the driver's front is just a hair quicker (pass side is "downhill" side).

    I voted "driver's front" because that's usually the one that exhibits lock before the ABS in my foot kicks in. ;) ("Racing gives you bad habits." Sure it does: habits like modulating the brakes, like always wearing your seatbelts, etc.)
     

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