Quote:
Originally Posted by Tesla
I'm kind of in the same boat, I have done a number of mod's, car goes better, wind noise is down, handling much better, but FE static, so there must be something sucking up those improvements and it is quite possible that it is the wake gaining more intensity as the flow elswhere improves.
I will continue smoothing things out and may try look at some trip mechanism then to see if it changes things, for better or worse.
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The Fiat Aero Lab published an SAE paper back around 1986 in which some changes which reduced upper body drag increased under-body drag,or visa- versa, for a net zero effect to overall drag.
As I recall,grille-blocking could back-fire,if it shunted air below a car with a torture-chamber underside.
If your vehicle is very tall compared to width,you might treat it as a symmetrical wing section/strut,getting as much air around it rather than over it.And use the L/W= 4 2-D profile,rather than the 2.5:1 3-D form.