Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Windows down on VW Golf = 2.5% FE reduction

MetroMPG · 11-28-2007, 08:43 AM

I thought 2.5% was realistic based the size of an open front window compared to the size of an open wheel well. Covering my rear wheel wells improved my FE about 2.8%. "Uncovering" the GTI windows reduced its efficiency by 2.5%.

I realize they're not the same things (one doesn't have a spinning wheel inside it, further stirring up the air). But it's in the ballpark.

11-28-2007, 08:43 AM	#3 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 12,538 Blackfly - '98 Metro Team Metro 90 day: 67.07 mpg (US) ForkenSwift - '92 Metro EV 90 day: 125.37 mpg (US) U.F.O. - '00 Insight Team Honda 90 day: 85.75 mpg (US) Thanks: 302 Thanked 1,020 Times in 568 Posts	I thought 2.5% was realistic based the size of an open front window compared to the size of an open wheel well. Covering my rear wheel wells improved my FE about 2.8%. "Uncovering" the GTI windows reduced its efficiency by 2.5%. I realize they're not the same things (one doesn't have a spinning wheel inside it, further stirring up the air). But it's in the ballpark. __________________ Latest project: removable Geo Metro boat tail Latest test: Massive cardboard air dam on a Geo Metro www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget