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Rear wheel vertical alignment

C

channella

PCGB Member
Member
The rear left wheel on my car looks to be at a greater angle from the vertical than the right. Taking a datum line from the lowest point on the tyre wall through the centre line of the wheel to the outside of the wheel arch, the top of the left wheel rim is 4-5mm more toward the centre of the car than the top of the right wheel rim. I can't think of any reason why one side should be different to the other and it still feels fine to drive.

So the questions are; how serious is this or how serious is this likely to be, and can it wait until the 48k £mega service in just over 2k miles time? Any ideas or thoughts? Thanks.

I guess there's a technical name for this setting too - please can you let me know if you know what it is, so I can talk to the OPC sensibly!
 
ORIGINAL: boxster27

The rear left wheel on my car looks to be at a greater angle from the vertical than the right. Taking a datum line from the lowest point on the tyre wall through the centre line of the wheel to the outside of the wheel arch, the top of the left wheel rim is 4-5mm more toward the centre of the car than the top of the right wheel rim. I can't think of any reason why one side should be different to the other and it still feels fine to drive.

So the questions are; how serious is this or how serious is this likely to be, and can it wait until the 48k £mega service in just over 2k miles time? Any ideas or thoughts? Thanks.

I guess there's a technical name for this setting too - please can you let me know if you know what it is, so I can talk to the OPC sensibly!
Click to expand...

Camber... Negative in this case /- Ideally it should be more or less the same both sides.

Positive is the other way -/ - like a Beetle with no engine.

I'd get your alignment checked sooner rather than later.
 
Thanks John.

Anybody got any recommendations as to where to get the camber checked as an alternative to local OPC in Guildford?

Are GT One in Chertsey any good?
 
Mark,

Spoke with Craig - dropped your name into the conversation as a referral - hope that's okay? Are they any good with brakes too?
 
Since having the alignment done, the car pulls to the left - so I have to steer right to go in a straight line, even round some large radius left-handers like those on a M-way. On super-elevated carriageways where you turn by steering straight and letting the road take you round I'm still steering right on left-handers. It took me a while to be sure it wasn't just more sensitive to road camber. If I allow the wheel to self-centre the car drifts left. Needless to say, the car is going back to be looked at. A bit frustrating.
 
ORIGINAL: boxster27

Since having the alignment done, the car pulls to the left - so I have to steer right to go in a straight line, even round some large radius left-handers like those on a M-way. On super-elevated carriageways where you turn by steering straight and letting the road take you round I'm still steering right on left-handers. It took me a while to be sure it wasn't just more sensitive to road camber. If I allow the wheel to self-centre the car drifts left. Needless to say, the car is going back to be looked at. A bit frustrating.
Click to expand...

Something is not right that's for sure.
 
Andrew,

Are you the first owner of the car?

It might be that the previous owner did some track days and had the settings changed?!?
 
Contact Chris Franklynn at centre gravity. He is a 911 owner and completely nuts about what he does. I need to get mine done soon. Chris uses beissbarth equipment and is able to do it mobile, if we could get enough people together, i think 5 is the max hed do in one day it would be good and we could set a venue relatively central to all. Cant find his number but let me know if your interested and I will dig it out.
 
Update: Car went back last week and was done again, and a bit more -ve camber added. Problem has improved, but front tyres had suffered from use at Bruntingthorpe (right-hand circuits) both pre and post the first alignment - particularly front left. So advice was to see what its like when new fronts go on. It'll be a couple of weeks before this can be done, I have a visit to Bedford's West Circuit to get out of the current ones first - although that's a LH circuit so if that is a cause may balance things up a bit if there is a factor there!
 
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