GEO Question

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mwmackenzie
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GEO Question

Post by mwmackenzie » Fri Sep 03, 2010 2:06 pm

Hi guys a wee bit of a techie question about Camber.... I had 7mm of shims on each side and with that there was -0.5 degrees of camber. The shims are made up of 2, 3mm shims and a 1mm shim.. what kind of figures would I see by removing a mm or 2 of shim?

Cheers

Mark :thumbsup
Mark MacKenzie

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Mike Scib
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Re: GEO Question

Post by Mike Scib » Fri Sep 03, 2010 3:21 pm

7mm each side??

Pretty sure mine had 3mm each side running -1 degree camber if i remember correctly :?

There is an approx figure per shim mark, sure i have read it on SE before.
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campbell
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Re: GEO Question

Post by campbell » Fri Sep 03, 2010 3:22 pm

Robin should be along in a minute, with the trig to work this one out. I'm too rusty now!
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steviej
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Re: GEO Question

Post by steviej » Fri Sep 03, 2010 5:31 pm

a 1mm shim is equal to 0.25 degrees of camber

Stevie

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mckeann
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Re: GEO Question

Post by mckeann » Fri Sep 03, 2010 5:46 pm

steviej wrote:a 1mm shim is equal to 0.25 degrees of camber

Stevie


correct. i took 4mm off my steering arms to get an extra degree. Its slightly less on the rear though, thats ok on the front though

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Re: GEO Question

Post by steviej » Fri Sep 03, 2010 6:51 pm

I took 3x 1mm shims out of each side (all there was) and still only got 0.8 degrees, moved the toe from 1mm toe in to 0.5 mm toe out, it fairly changed the car, made it far more positive / sensitive steering, need to to get some decent tyres and try it on track now to get a proper idea of how it behaves

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mwmackenzie
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Re: GEO Question

Post by mwmackenzie » Fri Sep 03, 2010 7:43 pm

Thanks guys, I'll pop another 3mm out and that should see me with -1.5 degrees :thumbsup
Mark MacKenzie

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steviej
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Re: GEO Question

Post by steviej » Fri Sep 03, 2010 7:47 pm

to go from -0.5 to -1.5 you will need to take out another 4mm (0.25 per mm)

Stevie

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mwmackenzie
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Re: GEO Question

Post by mwmackenzie » Fri Sep 03, 2010 7:51 pm

Already taken one out, cheers :thumbsup
Mark MacKenzie

BMW Z4 3.0si, [R14 MMK] To be Ring ready soon

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Re: GEO Question

Post by steviej » Fri Sep 03, 2010 8:00 pm

Ok thats good, btw I have some 0.5mm shimming material that is easily cut to shape if anyone is being really accurate with the geo settings and need some give me a shout

Stevie

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Gourlay83
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Re: GEO Question

Post by Gourlay83 » Sat Sep 04, 2010 8:25 am

Mark,

I have recently changed my camber to 1.5 degrees, made a huge difference on track but not great on the road. Fine when i get some heat in the tyres but when cold or wet it's very easy to lock a wheel. (Campbell :wink: )

I spent a few hours at KH adjusting mine, to get that camber to work I had to set the shocks (Nitrons) very hard and do the same with my roll bar. The turn in is freeking amazing. The trouble now, my car isn't any good unless it's being driven flat out.

Still wouldn't change it.

Alan
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mwmackenzie
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Re: GEO Question

Post by mwmackenzie » Sat Sep 04, 2010 8:48 am

Thanks Alan, I may well leave it be for now but next year I'm hoping to do a lot more on track as this year has just been a complete wash out for me in all ways :cry: so I think a wee winter refresh will be on the cards ready for next year if I can manage to keep her :roll:
Mark MacKenzie

BMW Z4 3.0si, [R14 MMK] To be Ring ready soon

Merc family hack [R4 MMK] 85% MacKenzie'd Family Spec

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