Quote:
Originally Posted by aerohead
1) You'd need to be extremely specific about what you actually mean by the use of the word.
2) We'd need a technical drawing with an accurate side elevation view, of a specific car, depicting the exact geometry, before and after, without and with.
3) The presence of a separation-caused, vortex-induced 'upwash' on a steeply-angled diffuser would be indicating for increased air resistance.
4 The diffuser on a Lucid Air would be a better 'benchmark' for a low drag diffuser.
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IMO the pictured solutions are for mostly cosmetics and marketing.
Use of "diffuser" in their description would be very disingenuous.
They also seem to completely ignore any proven Kamm beneficial simplistic KISS solutions.