Jrod 7 Posted December 19, 2007 Right well I have myself some 20mm torsion bars to fit. Main question is how much shorter should I make the dummy shock than standard to compensate for the extra stiffness? Anyone had any practice or shall I just do the same as I did with my 23mm... trial and error. Share this post Link to post Share on other sites
Sandy 189 Posted December 19, 2007 It depends what height you want. Try 300mm. Share this post Link to post Share on other sites
Jrod 7 Posted December 19, 2007 Standard ride height. Share this post Link to post Share on other sites
Super Josh 4 Posted December 19, 2007 Standard ride height. I think that I went with 310 between centres when using 20mm TBs. I can check tonight if you like Josh Share this post Link to post Share on other sites
Jrod 7 Posted December 19, 2007 Would be great to save me the hassle of having to check and recheck (as its fookin freezing!) Share this post Link to post Share on other sites
RossD 43 Posted December 20, 2007 Going a bit offtopic, where did you manage to find the 20mm bars? Share this post Link to post Share on other sites
Anthony 1,000 Posted December 20, 2007 As per Josh's reply above, I'd start somewhere around 310mm for standard ride height with 20mm TB's Share this post Link to post Share on other sites
Jrod 7 Posted December 20, 2007 (edited) I swapped them for some 23mm ones I had. You can get them from special tuning and 205 parts though. I'm hoping they should make for good fast road/rally along with the challenge shocks and springs. Just not sure what to do about rear ARB....19mm 25mm or something inbetween. Edited December 20, 2007 by Jrod Share this post Link to post Share on other sites
pug_ham 242 3 Cars Posted December 20, 2007 Just not sure what to do about rear ARB....19mm 25mm or something inbetween. Skip Brown uses a 23mm arb with 20mm torsion bars as part of their phase 2 suspension kit. I've got some 22mm bars & will be using a 24mm arb with them on a 309 beam when I get round to putting them on. Graham. Share this post Link to post Share on other sites
Jrod 7 Posted December 30, 2007 (edited) Well I've set it to 310 and it looks to low at the moment. I've got challenge spec springs on the front so maybe they have raised it up a bit from standard so I will raise it a bit at the back. Just had a look at the PTS build guide and it says 315mm for forest so I will try that. Edited December 30, 2007 by Jrod Share this post Link to post Share on other sites
Super Josh 4 Posted December 30, 2007 Well I've set it to 310 and it looks to low at the moment. I've got challenge spec springs on the front so maybe they have raised it up a bit from standard so I will raise it a bit at the back. Just had a look at the PTS build guide and it says 315mm for forest so I will try that. That's interesting J. I used 310mm with standard springs, so what exactly are 'challenge spec springs ' then? Josh Share this post Link to post Share on other sites
Jrod 7 Posted December 30, 2007 They are 185lb standard height as used in the 205 challenge, thus the name. Share this post Link to post Share on other sites
Super Josh 4 Posted December 31, 2007 They are 185lb standard height as used in the 205 challenge, thus the name. Do you know the rate for the standard springs J? Josh Share this post Link to post Share on other sites
RossD 43 Posted January 1, 2008 (edited) Standard GTi spring rate is about 155 - 160 lb/in at the front. 18.9mm torsion bars are approx 118lb/in. Edited January 1, 2008 by RossD Share this post Link to post Share on other sites
jord294 87 Posted January 1, 2008 i'm interested to know how to make up a dummy adjustable shock. is there any possibility someone can post up diagram and instructions please? could do with giving it a go, as i'd like to have experience setting the ride height. cheers Share this post Link to post Share on other sites
welshpug 1,626 Posted January 1, 2008 M10 Rod, 2 M10 Nuts, 2 metal bushes salvaged from a scrap pair of dampers and a bit of Tube Share this post Link to post Share on other sites
Jrod 7 Posted January 1, 2008 My quick bodge one. It's a bit better than that pic now as I've improved it a little. Share this post Link to post Share on other sites
Jrod 7 Posted January 23, 2008 Just set it to 315 an it's spot on, somehow I managed to strip the thread in the trailing arm where the ARB bolts on. I've drilled and tapped it to M10 and it's secure, do you think this is fine to leave or I should look into getting a new trailing arm? Share this post Link to post Share on other sites
Jrod 7 Posted January 24, 2008 somehow I managed to strip the thread in the trailing arm where the ARB bolts on. I've drilled and tapped it to M10 and it's secure, do you think this is fine to leave or I should look into getting a new trailing arm? Anyone? Share this post Link to post Share on other sites
Super Josh 4 Posted January 24, 2008 If you've tapped it and it is held on securely then I think you'll be fine Josh Share this post Link to post Share on other sites
