sdh2903
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| posted on 10/9/12 at 02:20 PM |
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I will check for bump steer when I get some time later in the week just to rule it out.
I'm going to take it back to where I got the geo set and have him corner weight and generally cast his eye over it.
Cheers for all the input
Steve
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sdh2903
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| posted on 10/9/12 at 02:22 PM |
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quote:
Originally posted by chillis
Make sure you have a decent amount of travel before the bumpstop at your normal ride height. if your hitting the bumpstop too soon then the effect is
like having a massive increase in spring rate. This will make it twitchy though bumpsteer does sound favourite. Maybe a touch too much front camber.
I would have gone with that ammount on the rear and half that on the front, Rear toe in (it is toeing in not out?) sounds good, and again halve it for
the front. As for Castor anywhere between 3 and 7 degrees will be fine. Theres no substitute for a full 4 wheel laser alignment as its the only way
you can properly check thrust angle.
Yes there is plenty of travel before hitting the bump stop.
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Fatgadget
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| posted on 10/9/12 at 03:37 PM |
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Front and rear axle alignment might also be an issue.
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procomp
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| posted on 11/9/12 at 02:01 PM |
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Hi.
Bump steer may be present in the geometry. BUT you need to map it out in both vertical movement and in a roll situation.
Some build bump steer in to the geometry to give a gain in grip levels.
Don't believe everything that's been written in in books a long time ago. 
Cheers Matt
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britishtrident
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| posted on 11/9/12 at 03:03 PM |
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All of the above but going back to simple things damper settings too hard ?
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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sdh2903
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| posted on 13/9/12 at 04:03 PM |
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Well a bit of an update.
I did a quick check for bump steer and there is very little movement at all.
However I did find what i think may be the culprit. My car uses a spitfire rack with half bmw half spitfire column and the lower triumph universal
joint, which has rubber washer type 'donuts' in it. when moving the steering side to side there is a lot of slop in these donuts which
I'm hoping is the cause of my issues. Ive ordered an uprated donut-less version and will give that a go.
Thanks for all the suggestions and will report back when i get the new bit fitted.
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ruskino80
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| posted on 13/9/12 at 05:06 PM |
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i used to run only 12 psi in the front and 16 to the rears with an r1 lump and it was nigh on perfect.
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