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reducing weight to reduce 1/4 mile time

Discussion in 'General' started by VNCommo, Mar 7, 2006.

  1. VNCommo

    VNCommo New Member

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    was just thinking about why commodores dont preform that well down the quater mile and was thinking how much weight to ya rekon it would require to be taken off in order for it to be in say the 12 sec braket. i no the vn is about 1300kg and buy felling the weight of the doors boot and bonnet i feel as if it can be reduced quite a bit. does the commodore engine have enough power to do a 12 sec run?

    comments
     
  2. Bax

    Bax Projecting

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    Take off say.. 700kgs.. haha.

    1300 isn't really 'that' much weight. With a bit more power and some basics removed you could probably get down into the 13's.. 12's are a bit more ellusive i think.
     
  3. VSSII

    VSSII New Member

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    Rule of thumb is 50 pounds of weight removed = 0.1 sec off E/T. I'd chuck the spare and that'd be it.
     
  4. bangers

    bangers New Member

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    get rid of the spare wheel, and rear seat. get fibreglass bonnet, guards and boot lid. get rid of door windows and get perspex ones. light rims and a different diff ratio would definately see you close to it if you didn't get it.
     
  5. sircruisealotVS

    sircruisealotVS New Member

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    funny thing about reducing the weight of a car to run 12's...you strip the interior and take everthing un-neccessary out, but if you do 12's your required to have a roll cage, so its kinda pointless in the first place.
     
  6. TheIceman

    TheIceman New Member

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    one hell of a lot. but why bother?

    it has enough power with the aid of a super charger to run into the 12's yeah.
    me mate had a VN V6 with a sick capa super charger, fully worked auto transmission, fully balanced and beefed engine, with a vortech type charger on it with water injection, extractors and a twin exhaust with twin cats all the way through.
     
  7. Pretender

    Pretender Brain function fading .

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    Different car but shows what improvement you could expect if you follow the same procedure.
    When 15 my friend and I were giving a 120Y by his grandmother.
    He lived on a farm with a long dirt driveway. We marked out 400m and laid a blistering hand timed 21 secs.
    We then got his Dad's tools out and removed: Bonnet, Doors, Bootlid, Windows, Seats (all of them), Contents of the boot, All Carpets and underlay, Lights, Bumpers, Front guards, Inner guards and then stood back and had a look. At this moment we thought we could do better so got the angle grinders out.
    Cut off the roof and as much of everything else as we could.
    In the end it had only the motor, gearbox, dash and suspensions mounts intact otherwise it was as flat as we could get it. Fuel filler was held up,to stop leaking, with a piece of fencing wire and we used a plastic school chair(also held in place with wire) for a driver's seat.
    We then timed it again and got a best of 17 seconds flat.
    So, if you do the same thing to a V6 Commodore, you should get into the 12second bracket given we obtained a 4 second decrease in times using only the stock motor. Given the extra torque you may get into the 11s.
    Give it go and let us know how it went or just supercharge it.
     
  8. holden#1

    holden#1 New Member

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    that paints a very humourous picture in my mind! 120Y with a plastic chair for driver down drag strip! you make a good point... not always practical to do this but it obviously makes a difference....

    these are the weights I remove out of my Calais when the need arises:

    get rid of spare save 20kg
    make sure you only have 10litres of fuel in tank. potentially save 50kg
    get rid of passenger. save 70kg

    theres 140kg saved without going to any bother...
     
  9. gocommygo

    gocommygo Guest

    lol you forgot mother in laws usually weigh a little more then 70kg ;)
     
  10. tougHnA

    tougHnA Guest

    hey boys wat about taken your aircon off i did on my vl :p there like 20kg or so.... :D noticed no difference thought but all adds up i guess......
     
  11. vlv8vic

    vlv8vic <---Brad Quaid = internet stalker

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    would have thought from the little difference it would make that it would be nicer to have air conditioning!!!

    Did you removed the ac yourself?
     
  12. ucwepn

    ucwepn America just kicked in yo

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    In the new mx5 mazda removed 90 grams or something like that from the rear view mirror. So I guess everybit does count. There is a thick layer of insulation under the carpet weighing between 5-10kg.skinny tyres weigh less than fatties so skinnies on the front will help as well. also if you can take the rear of your exhaust off theres another gain.
     
  13. Bax

    Bax Projecting

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    What is 20kgs in the airconditioning?

    I must be getting big if I can lift 20kgs with two fingers. I'd say about 4kgs for the compressor.

    I'd rather keep the luxuries then get 1/10th of a second.
     
  14. sixshooter

    sixshooter New Member

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    NO WAY.... You'd need a car that weighs 500 Kg with the N/A V6 output...
     
  15. greenfoam

    greenfoam New Member

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    The car would have to weigh about 750kg's, never going to happen in a VN :), better to start with a car that weighs sub 1000kgs to start with and then make it's motor output the same as the V6 or just put a bigger motor in it. Then what you have is just about every 10 and 11 second 1/4 mile car at my local drag strip, LC/J Toranas and Cortinas with 400 inch V8's
     
  16. vnbelina

    vnbelina New Member

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    what about to get in 14 sec
     
  17. TheIceman

    TheIceman New Member

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    just stick a cam in it.
     
  18. Cheap6

    Cheap6 New Member

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    There's not many car mods that haven't been tried before; weight reduction is the reason Hot Rods look the way they do - those full guards on '30-'40s cars are heavy.

    The old (Australian) 'Car' magazine did an article nearly 20 years ago where they removed various parts of a 120Y in much the same way as Holden#1 described and I have seen a similar article in a US mag taking the piss out of a 'Rice Boy' Nissan by showing the performance gain/reduction with body kit, big wheels and stereo gear removal - they kept going to remove doors and bonnet too.

    Zero cost weight reduction could also include removing window regulators and replacing with wooden dowel wedged between the glass and bottom of the door to hold the glass up.
     
  19. Bax

    Bax Projecting

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    Theres a good article on the net where they chop up a car.
     
  20. Pretender

    Pretender Brain function fading .

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    22 years ago I read the article which was the inspiration for our attempt.
    I believe they even used heater ducting to make a CAI. They got around 17 seconds without removing anywhere near what we removed to get the same time. They must have had the "sports" engine.
    I actually thought it was Street Machine who did it. We took photos of our effort so I'll try and find them.
     

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