Geometry ranges

[Tony]

On most cars the manufacturer offers three visible areas of information....

1: The checking range

2: The target position

3: The axle disparity

 

One missing range is the dynamic, i'll get to that one later.... So to explain.

 

1: The checking range is a permitted position of the wheel..... Lets say camber in this example with a vertical range from 0 to -1 degree.

 

The reason for this range is that inevitable changes in the chassis should have a "safe" zone where the handling and tyre wear will not be compromised.

 

2: In an ideal world the positions would be in the exact middle of the checking range "target"... If the angle is adjustable then expect nothing less from whoever is setting the chassis.

 

3: The figures you see on the screen are not just figures they are also forces the need reactive counter forces.

 

To maintain the handling the differences over an axle needs to remain inert, so limits need to be honoured.

 

The invisible range is the dynamic one... This is vitally important for the modified or track car but impossible for anyone to forecast in print due to the variables.

 

The method needed is to "pull down" and "lift" the suspension then observe the changes is the chassis positions. from this it's very possible to see how the car will handle dynamically.... obviously this form of calibration is more specialised.

 

In summery fixed chassis will not have symmetrical geometric positions... On a adjustable chassis expect nothing less than near perfect symmetry, axle disparity limits "must" be respected, and finally the modified car needs exploratory dynamic development since it's unique.

 

Hope this helps...

[alnug]

...and i take it you do this 'specialist' calibration Tony

[Tony]

...and i take it you do this 'specialist' calibration Tony

 

Yep .... Thing is the modified car has no settings so these need to be born... Dynamic measurements give that extra edge in predicting the handling.