zedhex Posted March 17, 2013 Share Posted March 17, 2013 I have a set of Bilstein B4s on my car, but the previous owner fitted a set of springs which provide a very low ride height - around 40mm lower than stock. I would like to raise it by about 20mm all round by raising the spring perch slightly, but what is the best/easiest way of doing this? I think I have three options: 1. Buy stiffer springs. 2. Get higher grooves machined into the shocks and move the perch mounting circlips up. 3. Get bigger perches. I don't like option one, as I think the current spring rate is hard enough already. I have heard of people in the US using coilover sleeves, but they seem to be a bit of a hack to me - a lot of extra stuff to break/rot (not to mention the exchange rate with the US has driven the shipping costs way too high). Option 2 seems viable, but how thick are the tube walls? would I weaken them? how much further up should I go? Option 3 would be nice, but I cannot find anywhere that makes them. Has anyone got any further ideas? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted March 17, 2013 Share Posted March 17, 2013 I'm sure Chris Wilson has said he can do this. Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted March 18, 2013 Share Posted March 18, 2013 I would like to raise it by about 20mm all round Option 2 seems viable, how much further up should I go? Call me crazy, but I'd say 20mm. Quote Link to comment Share on other sites More sharing options...
zedhex Posted March 18, 2013 Author Share Posted March 18, 2013 Call me crazy, but I'd say 20mm. but.... that's crazy Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted March 18, 2013 Share Posted March 18, 2013 Hey, thats just how I roll. But in my defence you did question your own answer. Quote Link to comment Share on other sites More sharing options...
Dan_Q Posted March 24, 2013 Share Posted March 24, 2013 i spoke to Chris not long ago on this very subject as I was struggling to get a combination I liked on my NA. He certainly does do the machining for the spring seats...... but 20mm change in the spring seat won't give you a 20mm drop at the wheel, as the shock levers on the lower arm part way down it. I never thought of this until speaking to chris- double wishbone has a lot more to think about than mac struts! I forget the exact details but I think he said he could machine 3 new seat grooves (so i could play until happy) in my bilsteins for £40 a shock. HTH Quote Link to comment Share on other sites More sharing options...
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