[dcb]

Nobody has articulated the theory about how Vortex generators are supposed to help, and under what circumstances. Saying we just can't measure the difference is "logic" that can be applied to any unicorn. It really is a unicorn for all intents and purposes, and if someone comes up with a repeatable (not background noise) design/process that other ecomodders can validate, well I would reconsider it as a possible non-unicorn, but most of the time it is background noise (and a lot of hot air and wasted energy discussing it).

If the difference is that small, and requires such a large investment in design even then, then most folks here shouldn't be messing with them, better to label it a unicorn made of unobtanium until proven otherwise (no, claims about one race car is not conclusive "proof").