Too much rear camber?

#1

I’m experimenting with less rear camber. I have eccentric RTABs. I asked the shop to give me -2 in the rear. They said that -2.5 was the best they could do. Is this the normal situation caused by our springs?

#2

There is a chart somewhere that explains the relationship of camber and toe with the various adjustment angles of the bushings. I always try to get Zero toe to maybe 1/32 toe in. With this I end up around 2.5 to 2.3 or so of neg camber. If your trailing arms are bent, which is common as they get older, you could have even more while trying to stay at zero toe.

Do a web search for the chart. It is on an E30 M3 site somewhere.

Michael
#36
Great Lakes Region

#3

ilateapex wrote:

[quote]There is a chart somewhere that explains the relationship of camber and toe with the various adjustment angles of the bushings. I always try to get Zero toe to maybe 1/32 toe in. With this I end up around 2.5 to 2.3 or so of neg camber. If your trailing arms are bent, which is common as they get older, you could have even more while trying to stay at zero toe.

Do a web search for the chart. It is on an E30 M3 site somewhere.

Michael
#36
Great Lakes Region[/quote]

Understood, but that is the crux of the issue. Eccentric rtabs should have been able to reduce my camber to something more neutral. But -2.5 was as neutral as they would go. Does it make sense that both trailing arms would be bent about the same amount? Is there a good way to measure a trailing arm to definitively identify whether or not it is straight?

#4

The only way I would think to know for sure if the arms are bent is to have good stock bushings and take the readings and see how far they are from the original spec. You would also need stock springs and such.

The trailing arms are very easy to get bent. If you have zero toe and each side has -2.5 camber, are the eccentrics both adjusted the same? I am not sure you could tell this by eyballing or not as any little adjustment makes a difference.

Michael
#36
Great Lakes Region