Excessive rear camber

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Chris-m
Posts: 55
Joined: 16 May 2015 03:52 pm
Location: lincolnshire

Excessive rear camber

Post by Chris-m » 18 Nov 2015 06:23 pm

As the title my 340 seems to have far to much rear camber, the rear tyres wear on the inside edge alot quicker and looking at the rear of the car it looks like too much

i didnt think the camber could easily be changed on a 340 rear axle, could the axle be bent?

any help appreciated

cheers
chris

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Excessive rear camber

Post by Ride_on » 18 Nov 2015 09:18 pm

Is the axle box horizontal in the front to back direction?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Chris-m
Posts: 55
Joined: 16 May 2015 03:52 pm
Location: lincolnshire

Re: Excessive rear camber

Post by Chris-m » 19 Nov 2015 06:08 am

Not sure ill have a look at the weekend

should the axle box be perfectley level i.e when on level ground it would read true to a spirit level?

cheers
chris

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Excessive rear camber

Post by Ride_on » 19 Nov 2015 10:26 pm

Yes, I don't think is hyper sensitive. A more accurate method might be to use wheel alignment equipment until you get zero toe.

As the axle rolls forward the negative camber turns into toe-in, from to 0-90 degrees, changes from 0-2deg (per side toe-in) so 22.5 degrees is -0.5degree toe, although axle might actually be bent of course. I don't know what angle the axle takes without the radius arm normally (lowering shouldn't matter), but the radius arm corrects this and keeps it the same as the suspension travels up/down.

The lowering process moves the radius arm further away from its normal location, really the mounting point for the arm on the body should be lowered aswell to keep the same geometry. Instead of paralell tracking up ad down the axle changes rotation as it moves up, creating worse geometry than the normal non-ideal suspension.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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