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Brock-Lee

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Posts posted by Brock-Lee

  1. If this is for the van you put pics up of, if you flip that overload leaf back onto the bottom of the leaf pack it will probably lift the car close to an inch.

     

    You will gain a half inch(/thickness of the overload) by just taking it off the top of the main leaf and a little more because it is holding the leaf pack flat.

     

    EDIT: looked like a late 80's vanette on 17's, curbs/driveways should be an issue haha

    • Like 1
  2. one of the reasons on a pink sticker I got was rearranged leaf pack haha, I had duct tape and shit all over them though so it looked hori as shit

     

     

    Looking at it again im pretty sure just the overload leaf has been flipped and put on top,take that and put it back on the bottom right way up and it will raise it a bit.

     

    Clamp the pack together in a vice when undoing the centre bolt and you will be sweet.

    • Like 1
  3. That overload leaf is supposed to be the otherway up and on the bottom of the leaf pack and the second leaf up from the bottom miiiight be upside down but hard to say.

     

    If you take them apart it will be obvious which way around they are supposed to be/ all arched the same way and get longer from bottom to top.

     

     

    If one of the main leaves is flipped then watch it when you undo them as it will try to fly to pieces when you undo the leaf centrebolt.

    • Like 1
  4. The velocity matters as much as flow, so a 1.5lt engine spinning at 10,000rpm will flow the same as a 3lt engine spinning at 5,000rpm. However, the velocity or the gasses will be alot higher, so the temperature will be higher, so the exhaust will have to larger than merely equivalent to a 3lt exhaust because it has to accommodate both the velocity and the increased tempature

    10000rpm in a 1.5l engine is 125L/s air flow

    5000rpm in a 3l engine is 125L/s air flow

    Flow rate Q = Velocity x Area of pipe

    There is no difference to the gas velocities under either condition as long as the pipe is the same size.

    You have just failed High School Physics

    • Like 2
  5. Yes you are, as pipe dia increases there is a drop in friction due to lower velocities and changes in relative roughness of the pipe etc. It comes down to being more expensive for larger dia pipe but mainly you just cant fit a 6" exhaust under a car.

    http://en.wikipedia.org/wiki/Darcy–Weisbach_equation



    You really need to ask questions rather than writing "facts" like the above dribble as this is how misinformation gets spread on the all mighty internet.

    EDIT: we are talking down the line here, I know nothing about megaphone exhausts/tuning for the correct frequency at the headers/collector but after that you just want to get it out.

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