I'm seeing about a 6-7% gain in my fuel mileage. In retrospect, think I raised the back up to much from the original design. But hey, it's a $20 project and I went on sight alone for the angle. Gives the car a whole new feel too. For example, when a semi would pass me going the other way on a 2 lane road. After the trailer would pass without the kammback it would create a noticable turbulance and jerk the whole car. Now with the kammback, it's not nearly as forceful. Real advantage is in coast down, which I'm working on too. Going to get some yarn and tape to try tuft testing sometime soon.
Sadly, no one has been able to guess what it is yet. Most common response, 'I thought you're back glass was busted out.' Nope, lol!
VT247
Quote:
Originally Posted by Sentraguy
Do you have the results of the add yet? I am really curious about this as I am getting ready to pursue it on my car.
|