Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204

Vekke · 03-27-2012, 06:11 PM

Hi,

Thanks to Ausias who tipped me off with this Cd study:

http://wwwm.coventry.ac.uk/researchn...%20Vehicle.pdf

Lupos 0.25 Cd target starts to feel pretty plausible without chopping the roof

.

Enjoy.

----

SUMMARY...

(added by MetroMPG, because these online files have a bad habit of disappearing...)

START: MIRA wind tunnel showed a stock co-efficient of Drag (CD) of 0.288
COOLING: vents, intakes, panel gaps taped on front end - Total Contribution: 9% of total Drag
Underfloor:-Foamboard and tape -All components covered -Total Contribution: 7% of total Drag
MIRRORS - door mirrors removed: -Total Contribution: 5% of total Drag
Wheels and Wheel arches: Wheel Spoilers / spats; smooth wheel covers; Wheel Arch Blanking (rear fender skirts); Underfloor Wheel Arch Blanking
Base pressure recovery (tailgate "box cavity")

03-27-2012, 06:11 PM	#1 (permalink)
Vekke Mechanical engineer Join Date: Jan 2009 Location: Kitee (Finland) Posts: 1,272 Siitin - '98 Seat Cordoba Vario 90 day: 58.56 mpg (US) VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L Diesel 90 day: 104.94 mpg (US) A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual 90 day: 64.64 mpg (US) Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L 90 day: 54.57 mpg (US) Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual 90 day: 32.98 mpg (US) A2 1.4TDI - '03 Audi A2 1.4 TDI 90 day: 45.68 mpg (US) A2 1.4 LPG - '02 Audi A2 1.4 (75hp) 90 day: 24.67 mpg (US) Thanks: 270 Thanked 841 Times in 414 Posts	Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204 Hi, Thanks to Ausias who tipped me off with this Cd study: http://wwwm.coventry.ac.uk/researchn...%20Vehicle.pdf Lupos 0.25 Cd target starts to feel pretty plausible without chopping the roof . Enjoy. ---- SUMMARY... (added by MetroMPG, because these online files have a bad habit of disappearing...) START: MIRA wind tunnel showed a stock co-efficient of Drag (CD) of 0.288 COOLING: vents, intakes, panel gaps taped on front end - Total Contribution: 9% of total Drag Underfloor:-Foamboard and tape -All components covered -Total Contribution: 7% of total Drag MIRRORS - door mirrors removed: -Total Contribution: 5% of total Drag Wheels and Wheel arches: Wheel Spoilers / spats; smooth wheel covers; Wheel Arch Blanking (rear fender skirts); Underfloor Wheel Arch Blanking Base pressure recovery (tailgate "box cavity") Attached Thumbnails __________________ https://www.linkedin.com/in/vesatiainen/ Vesa Tiainen innovation engineer and automotive enthusiast