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Last Post 10 May 2016 02:24 PM by  drdisque
Drum brakes vs disk swap
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Efcivic701
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08 May 2016 06:06 PM
    For auto cross best to swap to rear disk and keep rear drums for less weight?
    drdisque
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    09 May 2016 10:46 AM
    Rear brakes matter.

    However, you have to consult the rules of the class you are running to see if such a conversion is allowed. Usually a conversion is worth the weight if allowed.
    ron
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    09 May 2016 12:40 PM
    The weight of these cars usually doesn't necessitate the swap. Just get the factory rear shoes and properly adjust the rear brakes and it will be all that you need.
    drdisque
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    10 May 2016 01:37 PM
    Ah, I should have figured out what car he was talking about by his username.

    I Agree in that case.
    tdeutsch
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    10 May 2016 02:04 PM
    I'm relatively new to autocross, but I can't see how braking could be very demanding during our approx 1 minute runs to warrant a swap. Stab and go, trail and go. I'm thinking front to rear bias would be way more important than brake format (drum vs disc). Less "grabby" overall would be great, too. I used to have a Spitfire (for the street). The brakes were Schwinn sized, basically. The joke among Spitfire owners was that we had an early form of anti-lock brakes - press as hard as you want and they won't lock up.
    drdisque
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    10 May 2016 02:24 PM
    On a hot day, especially if you trail brake, the brakes get hot and braking force matters, but yes balance also matters, especially for a heavy car you don't want the force too far forward biased as that will exacerbate understeer or require excessively early braking in order to avoid understeer.
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