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Re: group buy john taylor springs
No life (a.k.a. DattoMaster)
Joined:
2002/8/6 2:24
From Brisbane, Australia
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Posts: 3792
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adjusting the shocks won't do anything to fix this problem. Shocks affect transitional movements, but by the middle of a corner (like all the pics above) you are relying on the spring rate. besides that, the konis JTS does in their kit are only adjustable in rebound.

there are 2 main causes for the inside front coming off the ground. the simple one is excessively soft rear spring rate. which both white cars have IMO.

the inside front wheel coming off the ground is basically caused by excessive softness at the outside rear.both of those white coupes have alot more body roll than the red coupe to start with, and when you get on the power coming out of the corner (as in all these photos) you trasfer even more weight to the rear thanks to those soft springs. And when the rear goes down, the front comes up. The inside front was basicaly at full dynamic droop anyway (the amount of droop allowed by the swaybar) because of all the body roll, so when you get on the power and it squats at the rear and lifts the front the inside wheel comes off the ground. You also have less weight on the outside front thanks to the excessive squat.

the second cause for wheel lifting can be a declining roll axis. basically if the front roll centre is higher than the rear roll centre the car won't lean evenly front and rear. The roll centre is the point at which the body rotates around the suspension during body roll when cornering. if the front roll centre is higher than the rear, you get exactly what you see in the photo of my white coupe. the outside front doesn't compress as much as the rear because the body's pivot point (roll centre) is too high. anyone who runs those commercially available "roll centre adjusters" or "Bump steer correctors" has probably got the front roll centre far too high.

The red car doesn't have JTS leaf springs, it has a set I made from 1200 and 120Y leaves, and a 16mm rear swaybar. Its also much stiffer in the front, both in springs and swaybar (20mm 120Y bar). The roll axis is slightly inclined - the front RC is lower than the rear. The combined effect is it sits alot flatter and has lifted the inside front basically because its generating so much lateral grip. Its not beacuse of excessive roll or excessive squat, its just transferred all the load to the outside front because of the amount of mechanical grip it generates.

Posted on: 2008/6/27 0:52
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Subject Poster Date
     group buy john taylor springs shaun 2008/6/25 9:40
       Re: group buy john taylor springs Mildman 2008/6/25 9:41
       Re: group buy john taylor springs 1200rallycar 2008/6/25 9:43
         Re: group buy john taylor springs shaun 2008/6/25 9:52
           Re: group buy john taylor springs sidedraught 2008/6/25 10:09
           Re: group buy john taylor springs DatsAndy 2008/6/25 10:19
         Re: group buy john taylor springs Mildman 2008/6/25 10:24
           Re: group buy john taylor springs shaun 2008/6/25 10:41
             Re: group buy john taylor springs bert 2008/6/25 10:51
               Re: group buy john taylor springs Mildman 2008/6/25 10:55
                 Re: group buy john taylor springs shaun 2008/6/25 11:01
                   Re: group buy john taylor springs Mildman 2008/6/25 11:02
                 Re: group buy john taylor springs sidedraught 2008/6/25 11:02
                   Re: group buy john taylor springs Mildman 2008/6/25 11:04
                     Re: group buy john taylor springs Ianey 2008/6/25 11:21
                     Re: group buy john taylor springs WhiteSedan 2008/6/25 11:24
                       Re: group buy john taylor springs boofhead 2008/6/25 12:50
                       Re: group buy john taylor springs Mildman 2008/6/25 13:11
                         Re: group buy john taylor springs heathbruce 2008/6/25 13:17
                           Re: group buy john taylor springs WhiteSedan 2008/6/25 13:41
                             Re: group buy john taylor springs PIGDOG 2008/6/25 13:43
                               Re: group buy john taylor springs benny 2008/6/25 23:16
                                 Re: group buy john taylor springs Mildman 2008/6/26 0:01
                                   Re: group buy john taylor springs converted 2008/6/26 0:57
                                     Re: group buy john taylor springs Mildman 2008/6/26 1:16
                                       Re: group buy john taylor springs L18_B110 2008/6/26 1:53
                                         Re: group buy john taylor springs Mildman 2008/6/26 2:01
                                           Re: group buy john taylor springs LittleFireyOne 2008/6/26 2:10
                                           Re: group buy john taylor springs L18_B110 2008/6/26 2:29
                                             Re: group buy john taylor springs Mildman 2008/6/26 2:37
                                               Re: group buy john taylor springs converted 2008/6/26 2:47
                                                 Re: group buy john taylor springs Mildman 2008/6/26 3:02
                                                   Re: group buy john taylor springs LittleFireyOne 2008/6/26 3:26
                                                 Re: group buy john taylor springs L18_B110 2008/6/26 3:36
                                                   Re: group buy john taylor springs Mildman 2008/6/26 11:04
                                                     Re: group buy john taylor springs converted 2008/6/26 12:44
                                                       Re: group buy john taylor springs Mildman 2008/6/26 13:05
                                                         Re: group buy john taylor springs L18_B110 2008/6/27 0:52
                                                           Re: group buy john taylor springs benny 2008/6/27 1:34
                                                             Re: group buy john taylor springs mattkb110 2008/6/27 2:24
                                                               Re: group buy john taylor springs L18_B110 2008/6/27 3:50
                                                                 Re: group buy john taylor springs Mildman 2008/6/28 6:08
                                           Re: group buy john taylor springs converted 2008/6/26 2:34
                         Re: group buy john taylor springs Cameron_Datto 2008/6/25 13:20
                 Re: group buy john taylor springs steveo 2008/6/25 11:03
       Re: group buy john taylor springs ruredi 2013/2/3 7:01




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