View Single Post
Old 10-30-2013, 10:44 AM   #4 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,534

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 57.73 mpg (US)
Thanks: 4,082
Thanked 6,979 Times in 3,614 Posts
Quote:
Originally Posted by kach22i View Post
I think that the conventional wisdom in the forum for this situation is that it need not fit the template, but should not exceed 22 degrees.
I've had positive results with Kammbacks & tails I've built that are "faster" than (fall "beneath") the template, but with the important distinction that I am always careful to avoid introducing sharp transitions.

(Though I'll also admit I haven't ever re-built a suboptimal mod to raise it up to the template line and compare the effectiveness of the two.)

I see a sharp transition here at the roof/Kammback transition, and also a sharp transition from the side of the Kammback to its top surface. That's where I see red flags.

"Think radius, not corner."
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote