Just out of curiosity really, can anyone tell me how these parameters are come to? I'm not just takling about on a 7 but in general. Obviously it is dependant on the vehicle application.

i remember reading somewhere (possibly staniforth's book) that 1.6:1 wheelbase to track ratio is about where you want to aim for, can't remember why though..

Ned.

my VortX is about 1.6:1

Yes it's in the "Race and Rally Car Source Book".

Brief section and no conclusion about what works best (a real Lotus 7 is 1.6), but 1.62 'looks best' because of the golden ratio thing.

Values normally lie in 1.4-1.7 range. Smaller can mean a lower polar moment of inertia assuming most of the mass is within the wheelbase (which IIRC means it tends to turn better, but is less stable in a straight line) 100cc Karts sit at 1.155.

He mentions experimenting by changing wishbone geometry.

Working from home today so can look up such trivia

Ta very much.