Quote:
Originally Posted by dcb
You must understand that any chance of improvement will have to come with very vehicle specific VG tabs and installation instructions (and data to document the testing of the tabs on a previous particular vehicle configuration). And even then it sounds like the gains of VG on a car are on the slim side (i.e. .006 CD with a whole lot of tuning I'm sure). I do not find such a large effort for a small (if any) gain very appealing myself  Maybe I'm wrong. |
I think I do have an understanding of what you are saying. That minimal gain was on a very differently shaped vehicle than the one I wish to experiment on, the VW beetle. And the effort is not large when compared to a tail or kamm. The Beetle has a particularly large problem with the constantly increasing angle back, so it seems likely that keeping that airflow attached to the base of the rear glass, where it can be straightened by a Bonneville-type spoiler may have greater effect than an Evo that likely was intended to have more gains in downforce than drag reduction.