mccrindle Posted November 8, 2012 Report Share Posted November 8, 2012 Right I need to order custom rear springs and I'm not sure of the measurements asked for below. I would measure them myself but flat out at the moment.ok, are they parallel springs. If so I need the length/inside dia/wire thickness+no of coilsI know the length I want the springs to be I'm just wondering if anyone knows the rest about JOM rears? Cheers Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 There not parallel there progresive so the spring rate would take some serious maths the calculate! Quote Link to comment Share on other sites More sharing options...
mccrindle Posted November 8, 2012 Author Report Share Posted November 8, 2012 Ok thanks, ill get back in touch with them Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 (edited) i happen to have a JOM rear spring laying around in my bedroom ( as you do lol)notice how the coils are not an equal distance from each other mean that the spring rate changes over the lenght of the springThe equation to work out spring rate for a parallel spring isG x pi x( d²)²⁄ 64 x D ² x Nnot sure how you would work out the spring rate of this one though .. Edited November 8, 2012 by Blaine Quote Link to comment Share on other sites More sharing options...
JoeA Posted November 8, 2012 Report Share Posted November 8, 2012 Blaine, sounds stupid, but on a spring like the one above, would the ride height be affected (in either direction) by flipping the spring over? Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 No joe would'nt make a difference in ride height...every force has an equal and opposite force ect Quote Link to comment Share on other sites More sharing options...
JoeA Posted November 8, 2012 Report Share Posted November 8, 2012 No joe would'nt make a difference in ride height...every force has an equal and opposite force ectOfcourse, thanks, makes sense now Why on earth do they coil them tighter at one end? Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 It's beacuse as the car goes lower ( after hitting a bump or if a vw enthusiast has taken the adjuster out) you need a harder spring rate to stop the car from bottoming out..so the lower you go the harder the car gets effectivly Quote Link to comment Share on other sites More sharing options...
JoeA Posted November 8, 2012 Report Share Posted November 8, 2012 For reference, its usually the tighter coils at the top isnt it ? Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 yeah mate with these ones they actually have to go that way, as the last coil on the bottom is wound to fit the adjuster and the top coil to hold the rubber thing that fits on the bobble of the chassis Quote Link to comment Share on other sites More sharing options...
JoeA Posted November 8, 2012 Report Share Posted November 8, 2012 Yeah ive ****ed off the rubber bit ha Quote Link to comment Share on other sites More sharing options...
Blaine Posted November 8, 2012 Report Share Posted November 8, 2012 (edited) Yeah ive ****ed off the rubber bit hahaha anything in the name of lows Edited November 8, 2012 by Blaine Quote Link to comment Share on other sites More sharing options...
JoeA Posted November 8, 2012 Report Share Posted November 8, 2012 Yeah and they wouldn't fit in my fk springs ha Quote Link to comment Share on other sites More sharing options...
Nigel Gatehouse Posted September 4, 2023 Report Share Posted September 4, 2023 Hi will the Jom coilover springs be wider than standard because I have 9.5 width wheels & had to fit spacers to standard set up to stop spring rubbing wheels thx Quote Link to comment Share on other sites More sharing options...
mk2 Posted September 4, 2023 Report Share Posted September 4, 2023 JOM or JDM? Either way, check the data sheets... Quote Link to comment Share on other sites More sharing options...
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