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Thread: Pondering

  1. #1
    Ex Vec-C Admin ed taylor's Avatar
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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 3.2 V6

    Year : 04

    Mileage : 000

    Default Pondering

    I have been pondering for some time Why do some car manurfactures put the brake calipers at the front (leading) of the disc ( like VX) and some others ( mainly german manurfacturers) put them at the rear (trailing) of the disc. Is there any advantage to be acheived in either of these options??

  2. #2
    Regular Member rushy's Avatar
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    Steering angle on huge rims and callipers? Maybe cooling of the disk? Or maybe just cos it looks different?

  3. #3
    Regular Member danBoy's Avatar
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    From what I've been told calipers on the front of the disc act like they are pushing the car to a stop, cars with calipers on the rear of the disc act like they are pulling the car back to stop, that could all sound like a load of rubbish but it kind of make sense in my head lol I guess it varies on the performance of the vehicle and what suits it best.

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    Regular Member parapaul's Avatar
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    The reason I heard is that because the calipers are so heavy, putting them nearer the centre of the car can improve handling...

  5. #5
    Regular Member rushy's Avatar
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    Quote Originally Posted by parapaul View Post
    The reason I heard is that because the calipers are so heavy, putting them nearer the centre of the car can improve handling...
    Sounds good to me, every kilo counts on Super/Hyper cars.

  6. #6
    Regular Member boba's Avatar
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    More mundanely it depends a bit on clearances too and with a transverse engine it gets a bit crowded behind the wheels on lock.

  7. #7
    Regular Member Hideous's Avatar
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    Vehicle : Insignia

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    Interesting, never thought of this before.
    The way I see it, physically: -
    • Calipers to leading edge (front) : brake disc rotates past the caliper in a downwards direction, therefore pad friction must act UPWARDS
    • Calipers to trailing edge : brake disc passes the caliper in an upwards direction, so pad friction must act DOWNWARDS
    Any difference between the two in terms of braking performance would be, imo, almost immeasurable - but I'm sure there's some brainbox out there who could do a calculation to prove it one way or the other.

    As already said, it could be just part of the car design - for optimising weight distribution. Yep, I think my money would go on that.

  8. #8
    Forum Moderator soulman's Avatar
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    a good question Ed ............but cant help lol

  9. #9
    On a Sabbatical VauxVeteran's Avatar
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    I'll put you out of your misery....it all dates back to when Hans worked for VW and Tony worked for VX, Hans liked to use his right arm for undoing nuts and Tony liked to use his left, so both firms bowed to their employees requests and fitted calipers to suit the staff.

    Simple innit

  10. #10
    Regular Member Thunder's Avatar
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    love your anwser

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