zpiloto
02-10-2007, 12:52 PM
Fashioned a boat tail out of cardboard and coloroplast. Did bi-directional runs North and South. Winds were 350@9 at the beginning and 360@14 after the end of the last run. Temperature remained steady at 45. Speed was 55. No cruise control but scan gauge showed average speed 55. Increase in FE 2.17%
With BT
N S
42.2 49.0
42.0 49.2
Avg 45.6
Without
N S
40.4 49.3
40.2 49.2
Avg 44.775
With BT
N S
42.0 49.5
42.1 49.7
Avg 45.825
Overall average 45.75 with BT
Overall average without 44.775
Total increase of 2.17%
Little disappointed with the results. Was expecting double what I ended up seeing. Although I am happy with the 45 MPG highway.:thumbup: I think that with cheap fabrications and crude attachment procedures that 3% is about it as far as mods go. Seems like every aero mods hit’s somewhere around 3%. Just proving that there is no silver bullet you just need to make sure your clip is full.
http://www.gassavers.org/garage_images/7f1pzbjmqekdrvjs3fuq.jpg
With BT
N S
42.2 49.0
42.0 49.2
Avg 45.6
Without
N S
40.4 49.3
40.2 49.2
Avg 44.775
With BT
N S
42.0 49.5
42.1 49.7
Avg 45.825
Overall average 45.75 with BT
Overall average without 44.775
Total increase of 2.17%
Little disappointed with the results. Was expecting double what I ended up seeing. Although I am happy with the 45 MPG highway.:thumbup: I think that with cheap fabrications and crude attachment procedures that 3% is about it as far as mods go. Seems like every aero mods hit’s somewhere around 3%. Just proving that there is no silver bullet you just need to make sure your clip is full.
http://www.gassavers.org/garage_images/7f1pzbjmqekdrvjs3fuq.jpg