Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Aerodynamic Streamlining Template Overlay for ZX2?

Tygen1 · 01-09-2010, 08:48 PM

So heres the results.

Spoiler was set to 30 degrees, with an angle of interception to the roof of approximately 13-14 degrees

Conditions: 30 degrees F, 30.17 Baro, 33% Humidity, Winds NNW 9mph.
No wind on route, unless noted, road is surounded by trees. Starting Speed Was 70mph, then coasted down to 30mph. Runs were started in the same place, unless noted, going each direction, road is not flat. All runs ended in approximatly the same place as well.

First Coast Down Run going West with Spoiler:
West, 53.7 sec.
East, 1.00.2
West, 54.6
East, 1.00.3
West, 59.6
East, 1.00.2
West, 57.4

Now without spoiler going East to start:
East, 101.1 sec.
West, 102.2 (tailwind, enough to blow a flag by the road)
East, 101.5
West, run spoiled by someone deciding to park in the road

East, 103.4
West, 59.4
East, 102.6
West, 55.0 (started and ended in a different spot due to "traffic")

Now with Spoiler again.....wait....whats that sound, thats the sound of the spoiler getting ripped off at 65mph, should have put on more tape! Made two runs without knowing it was off, then drove under a street light and noticed it wasn't there. The next half hour was spent in the dark looking for it. Ran out of time and couldn't finish. Either way, these next two numbers are without bias, because I thought the spoiler was there and it was not, but I did have a lot of flapping tape

East, 1.00.1
West, 55.7 (started in the same place as noted above)

With some creative droping of highs and lows to account for the inconsistancies I get 58.06 sec. with Spoiler and 60.41 without spoiler. It would seem the spoiler did not help in this configuration.

Edit: Some notes after some pondering.... I believe the West bound times are as inconsistant as they are because I did not have land mark to reach 70mph by and therefore had an inconsistant start point and because it was a bit hilly, the ending point on the West Bound coast down was an up hill. So we could just drop out those times and just look at the East Bound times. If we do that we get a 1.5 longer coast down time with the spoiler vs. 2.35 as I calculated it before.
I also noticed that quite a bit of dust had accumulated under the spoiler, in just one hour of driving. So this leads me to believe that it just increased the size of the wake.

I believe the next steps will be some tuft testing to see what the air is doing on the trunk lid and I'd like to try a horizontal extention to see what effect that has. Also need to try and find a better road to test on.

waiting on some feedback from you fellas...

01-09-2010, 08:48 PM	#35 (permalink)
Tygen1 Master EcoModder Join Date: Dec 2008 Location: South Jersey Posts: 553 Little Blue - '98 Ford Escort ZX2 Cool Team ZX2 90 day: 44.75 mpg (US) Big Red - '00 Ford Excursion XLT 90 day: 15.53 mpg (US) Thanks: 5 Thanked 45 Times in 29 Posts	Hmmm..... So heres the results. Spoiler was set to 30 degrees, with an angle of interception to the roof of approximately 13-14 degrees Conditions: 30 degrees F, 30.17 Baro, 33% Humidity, Winds NNW 9mph. No wind on route, unless noted, road is surounded by trees. Starting Speed Was 70mph, then coasted down to 30mph. Runs were started in the same place, unless noted, going each direction, road is not flat. All runs ended in approximatly the same place as well. First Coast Down Run going West with Spoiler: West, 53.7 sec. East, 1.00.2 West, 54.6 East, 1.00.3 West, 59.6 East, 1.00.2 West, 57.4 Now without spoiler going East to start: East, 101.1 sec. West, 102.2 (tailwind, enough to blow a flag by the road) East, 101.5 West, run spoiled by someone deciding to park in the road East, 103.4 West, 59.4 East, 102.6 West, 55.0 (started and ended in a different spot due to "traffic") Now with Spoiler again.....wait....whats that sound, thats the sound of the spoiler getting ripped off at 65mph, should have put on more tape! Made two runs without knowing it was off, then drove under a street light and noticed it wasn't there. The next half hour was spent in the dark looking for it. Ran out of time and couldn't finish. Either way, these next two numbers are without bias, because I thought the spoiler was there and it was not, but I did have a lot of flapping tape East, 1.00.1 West, 55.7 (started in the same place as noted above) With some creative droping of highs and lows to account for the inconsistancies I get 58.06 sec. with Spoiler and 60.41 without spoiler. It would seem the spoiler did not help in this configuration. Edit: Some notes after some pondering.... I believe the West bound times are as inconsistant as they are because I did not have land mark to reach 70mph by and therefore had an inconsistant start point and because it was a bit hilly, the ending point on the West Bound coast down was an up hill. So we could just drop out those times and just look at the East Bound times. If we do that we get a 1.5 longer coast down time with the spoiler vs. 2.35 as I calculated it before. I also noticed that quite a bit of dust had accumulated under the spoiler, in just one hour of driving. So this leads me to believe that it just increased the size of the wake. I believe the next steps will be some tuft testing to see what the air is doing on the trunk lid and I'd like to try a horizontal extention to see what effect that has. Also need to try and find a better road to test on. waiting on some feedback from you fellas... Attached Thumbnails __________________ Last edited by Tygen1; 01-10-2010 at 09:09 PM..