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should i heat my springs?

JonesA4 Sep 24, 2009

  1. JonesA4

    JonesA4 New Member

    i have a 2000 audi a4 1.8t quattro. and i was wanting to lower it by heating the springs. if anyone has ever done it or knows anything about it i would appreciate the input:blackrs4:
  2. Tifun

    Tifun Highly Rated

    Did this on an old Mustang GT fox body way back in the day. If you want to go low and don't have the money then cut the springs, however I suggest buying a proper setup so your brain doesn't turn to mush from all the bouncing. Spring kits are reasonably priced.
  3. Broken Byzan

    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User quattro Audi A4

    Its rare enough to find one of these cars without snapped springs, if you are going to remove them anyway to heat them a spring kit can be had for as low as £67.
  4. Matt82

    Matt82 Active Member

    i took a coil off a set of eibach pros a couple years back with no ill effects but i highly recommend you have uprated/good dampers because there is nothing worse than a car on lowered/uprated springs and standard dampers IME
  5. aragorn

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    If the spring isnt pigtailed, then you can safely cut a coil off (or more probably, depends on the spring) to lower the car, and as a nice side effect the spring rate will go up too.

    If it IS pigtailed then i wouldnt start that kinda thing.

    IIRC quattro rear springs are pigtailed at the bottom and parallel at the top, as are the fronts. If thats the case, then carefully grinding a coil (or half a coil or whatever) from the top of the spring wont be an issue, as it will still correctly seat in the spring platform and as long as you dont take too much off, it will stay properly seated when the suspension is at full drop

    Heat will change the tempering of the steel, and could affect the spring rate or even cause it to snap. if your going to cut a coil off, use a very thin cutting disk (0.8-1.2mm) to minimise the heat dissapated.

    If your wanting to make a good job of it, you need to arm yourself with the weight acting on the spring, the spring rate, and the free spring length. From that data you can calculate the new rate and new ride height after the chop.

    One rough way to work out the spring rate, is to pop the spring on a set of scales, measure its free length, then lean on it with all your weight, then take a note of the compressed length and how much it shortened by. If you then use that spring rate, and the compressed length when fitted to the vehicle you can calculate the force acting on the spring.

    Or you can just beast in, hack a coil off and see what happens :p
  6. Siena

    Siena Active Member

    Not advisable.
  7. ian52

    ian52 2000 a4 1.8tqs-yellow

    one of the rears on mine was broken close to the end so i just rounded it up to a coil with the grinder then done the same to the other side without any problems.

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