Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Increasing downforce while reducing drag?

Hermie · 08-13-2009, 01:13 AM

Did the tuft testing, and tomorrow I'll have the pleasure of removing tape residue...

Testing done at a max of 55 MPH.

There's a HUGE area where it loses touch with the window and about half the trunk, but it does reconnect. Probably at around 90, it'll be so large that it won't reconnect.

There's a smaller area where the air disconnects (where the flat plastic trim is), but surprisingly the air reconnects after that.

I'm going to look into some vortex generators to help the flow, and install an M3-style lip spoiler (that's 3/4" tall). That should help the rear end out a lot.

Then, when I find the material and money, I'll smooth out the underside with a partial pan and rear diffuser.

I also found out, much to my relief, the hood vents do in fact vent, and don't take any air in. ^^ Front lift reduction FTW!

08-13-2009, 01:13 AM	#55 (permalink)
Hermie Banned Join Date: Aug 2009 Location: Lebanon, OR Posts: 90 Stickers - '91 Ford Tempo GL Thanks: 0 Thanked 2 Times in 1 Post	Did the tuft testing, and tomorrow I'll have the pleasure of removing tape residue... Testing done at a max of 55 MPH. There's a HUGE area where it loses touch with the window and about half the trunk, but it does reconnect. Probably at around 90, it'll be so large that it won't reconnect. There's a smaller area where the air disconnects (where the flat plastic trim is), but surprisingly the air reconnects after that. I'm going to look into some vortex generators to help the flow, and install an M3-style lip spoiler (that's 3/4" tall). That should help the rear end out a lot. Then, when I find the material and money, I'll smooth out the underside with a partial pan and rear diffuser. I also found out, much to my relief, the hood vents do in fact vent, and don't take any air in. ^^ Front lift reduction FTW!