Car weights!!

Discussion in 'Track Prep & Tech' started by I V - mk1 16v, Jan 22, 2006.

  1. Notso Swift Forum Member

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    I think that is weak too high, there is not much real weight in the glasshouse, most of it is in the rails, motor, rear beam
    As an educated guess/rule of thumb, US front engined RWD V8's use the the centre of the cam shaft (in the Vee)
    So using that and considering we have allloy heads maybe the mid point of the motor, you would think it would be OKwithin 25 mm or so
     
  2. mk2mro New Member

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    The middle door swage is about 675mm from the floor on my car, does this sound more reasonable?
     
  3. mk2mro New Member

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    I'm looking at structurally optimising a Mk2 Golf control arm, and as part of this require the torque at the ball joint.

    I am basing my CoG at 675mm from the floor*, and the centre of the ball joint is 175mm from the floor.

    As I saw you have mentioned earlier in this thread, T = F x D. With that in mind...my total weight of the car is 11359N and when braking, this force is trying to effectively turn around the ball joint.

    To calculate this:

    T = 11359 x (0.675 - 0.175) = 5679.2/2 = 2839.75Nm


    I am having trouble with my model when analysing the control arm using this torque figure - The stresses are massive and there is no way the part would be suitable, this is even before optimising.


    My question is, does anyone know roughly where the CoG of a Mk2 Golf is? I have based the weight distribution front/rear as 64/36 as I can reference this from a book I found.

    I understand how the CoG can be calculated but do not have time for this.

    Any help would be massively appreciated.


    *The CoG I have used of 675mm from the floor is around the main swage line in the door.

    Cheers
     
  4. Notso Swift Forum Member

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    Still sounds very high to me
     
  5. jon23 New Member

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    Location:
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    Fully stripped including wheel well delete
    Half cage
    Perspex Windows all round
    Fibreglass front wings
    Rear arches cut and replaced with fibreglass
    lightweight wheel's 5kg each
    Rear valance cut out as well

    815kg without driver and half tank of fuel
     
    Last edited: Jun 1, 2017
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  6. knarfmk1 Forum Member

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    Location:
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    [​IMG]

    [​IMG]
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    [​IMG]

    Fully stripped
    Wheel well delete
    Plastic fuel cell
    Full cage
    Lexan windows all round
    Fibreglass front wings, bonnet, tailgate & bumpers
    Lightweight Force racing wheels 3,5kg each
    Rear valance cut out
    No underseal
    1 seat & harness

    ARC/AFH hybrid engine 1600 16V

    711kg with 25L of fuel and no driver
     
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  7. pascal77uk Paid Member Paid Member

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    42A47C95-007C-4CEC-BFDD-1DCC48C13ED7.jpeg

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    A458A298-3D9C-4ECE-B6BF-C2A0B47BD427.jpeg

    Golf Mk1
    16v ITBs
    020 Box
    Extensive Full cage
    All steel panels
    No Fuel
    795kgs
     
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