Quote:
Originally Posted by wpoll
The OEM factory rails, mounted front to back (longitudinally) , are unlikely to have any measureable effect on fuel consumption or drag etc.
Mount some cross rails (laterally) on them and its a different story.....
|
I don't know enough about flow to really know how it affects drag. I'd expect the lower amount surface area the air stops on to have a big effect, but you could be correct.