Grant:
fritz:

Thanks to the much greater ground clearance of road cars compared to racing cars the capability of just a diffuser to create downforce in this kind of application are generally overrated anyway.

Good point.  A car using just a diffuser would benefit from an adjustable air suspension that could be lowered on a smooth track (McLaren P1 does this, and also has a wing)...

True, but the adoption of a hitherto unavailable variable-height suspension for a limited number of a series-runout model variant can be safely ruled out. 


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fritz