suspension design advise - track change value

[ohv]

Hi,

I'm designing double wishbone suspension for small 2-seater and I need advise about geometry changes, especially track change.

I've made some measurments from CAD model:
(* lenght from roll center to outer/inner wheel center
** outer/inner wheel camber)

Body roll -> 0 deg
Wheel track -> 1507,8mm (753,9/753,9)*
Camber** -> 0 deg / 0 deg

Body roll -> 2deg
Wheel track -> 1507,1 (757,5/749,6)*
Camber -> +0,96 deg / -0,87 deg

Body roll -> 4deg
Wheel track -> 1504,8 (760,3/744,5)*
Camber -> +1,90 deg / -1,96 deg

My questions are:
Are this track and camber changes correct?
What is maximum recommended track change for a track-use car?

thanks in advance

Regards
ohv

 

[hemipanter]

There is nothing wrong with the numbers; they might be either larger or less depending on geometry. Another thing is if this geometry is the one to use. This depends on the overall design of the car and what you want from the geometry. Myself I don’t look at Tw change in relation to Rc, only in relation to the chassis. This is for a number of reasons, Rc might be seen as the intersection of the force lines or the spot the chassis actually roll about. I use Rc, by the meaning of Fl intersection, for determine geometric weight transfer balance.
Regards
Goran