Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

aerohead · 06-10-2009, 04:32 PM

Istas,I made a thumbnail sketch off the computer screen of the back of your roof/rear deck.From the top of the backlite header to the rear edge of the trunklid,I'm measuring about 18-degrees.That's a bit steep for the air to follow and I don't believe it is re-attaching.You might make a simple rear spoiler which angles up at no steeper than a 30-degree angle ( as measured from the horizon) projecting up and to the rear until it intersects an imaginary line down from the roof at no more than say 13-degrees.It would be a cheap and dirty way to get your flow re-attached without adding adding any significant length,your turbulent wake will be reduced and it should show up at the gas station.

06-10-2009, 04:32 PM	#30 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 16,267 Thanks: 24,392 Thanked 7,360 Times in 4,760 Posts	rear spoiler Istas,I made a thumbnail sketch off the computer screen of the back of your roof/rear deck.From the top of the backlite header to the rear edge of the trunklid,I'm measuring about 18-degrees.That's a bit steep for the air to follow and I don't believe it is re-attaching.You might make a simple rear spoiler which angles up at no steeper than a 30-degree angle ( as measured from the horizon) projecting up and to the rear until it intersects an imaginary line down from the roof at no more than say 13-degrees.It would be a cheap and dirty way to get your flow re-attached without adding adding any significant length,your turbulent wake will be reduced and it should show up at the gas station.