Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Boat tail on a normal car? (3-box sedan)

cliffyballs · 03-16-2011, 11:44 AM

Side shot of possible design:

http://i1217.photobucket.com/albums/...s/Taillook.jpg

Streamline Template:

http://i1217.photobucket.com/albums/...Streamline.jpg

I did an RPM to speed comparison:

75MPH = 3800RPM
70MPH = 3500RPM
65MPH = 3000RPM
60MPH = 2800RPM
55MPH = 2600RPM

This was all in 5th gear

Then a 10mph coasting slow down test

70-60 11.3 second average
60-50 13.2 second average
50-40 16 second average

Taft test on the trunk coming next

03-16-2011, 11:44 AM	#32 (permalink)
cliffyballs EcoModding Lurker Join Date: Mar 2011 Location: Alabama Posts: 24 Leftnut - '03 Volkswagen Jetta GLS Thanks: 4 Thanked 1 Time in 1 Post	Better photos and test results Side shot of possible design: http://i1217.photobucket.com/albums/...s/Taillook.jpg Streamline Template: http://i1217.photobucket.com/albums/...Streamline.jpg I did an RPM to speed comparison: 75MPH = 3800RPM 70MPH = 3500RPM 65MPH = 3000RPM 60MPH = 2800RPM 55MPH = 2600RPM This was all in 5th gear Then a 10mph coasting slow down test 70-60 11.3 second average 60-50 13.2 second average 50-40 16 second average Taft test on the trunk coming next Last edited by cliffyballs; 03-16-2011 at 11:47 AM.. Reason: Links don't work