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Old 02-03-2011, 03:26 PM   #82 (permalink)
jedi_sol
Master EcoModder
 
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Join Date: Mar 2009
Location: Tustin, CA
Posts: 929

2013 STi *SOLD* - '13 Subaru Impreza WRX STi
Subaru
Sports Cars
Team Turbocharged!
90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
90 day: 58.68 mpg (US)
Thanks: 368
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Quote:
Originally Posted by groar View Post
Your last 10 tanks are since 2010-10-13 while the 10 previous one were from 2010-04-19 to 2010-10-01, ie automn-winter vs spring-summer, so the 2.8% improvement is certainly lowered by lowered temps.

Do you feel the car behavior different ?
I know that with the rear wheel skirts my car accelerates stronger and is more difficult to keep at a steady speed, as it want to accelerate rather easily...

Denis.
EXACTLY! Getting a slight increase in MPG during winter months vs. warmer temps means the underbelly tray is working.

As far as driving behavior, yes the car accelerates easier, I can eoc MUCH longer. (Even though I did this mod for FE reasons) My favorite improvement is the dramatic decease in wind noise.

Darin -
Yeah, i've seen your posts regarding your undertray, the amount of labor going in vs. the amount of FE improvement is a little disappointing. But every little bit helps, right?
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