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Old 04-14-2022, 06:27 PM   #128 (permalink)
Drifter
EcoModding Apprentice
 
Join Date: Apr 2022
Location: California
Posts: 166

Cx9 - '18 Mazda CX9 Grand Touring
90 day: 31.41 mpg (US)

Prius - '10 Toyota Prius III
90 day: 57.8 mpg (US)

Tundra - '00 Tundra V6 long bed base work truck
90 day: 19.4 mpg (US)
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Quote:
Originally Posted by Phase View Post
ill for sure work on the boat tailing with the mid length. only difficult thing is going to be the side with the tail lights!

also since youre good with math, can you tell me what my highway mpg would increase to if i lowered the cd from 0.24 down to say just 0.20 without changing the engine or weight or anything system wise?
Are you using the Ecomodder calculator? Here it is with the assumptions I used (3500 lb with driver, .24 Cd, 23.5 Frontal area, .007 rolling resistance, 1000Watts parasitic load, 36% thermodynamic efficiency, 85% drivetrain efficiency, summer gas): https://ecomodder.com/forum/tool-aer...ToStep=5-200-5


That spits out ~20 horsepower aero drag and 42mpg at 80mph. Changing the CD to .20 results in ~16.5 horsepower aero drag and ~48mpg:
https://ecomodder.com/forum/tool-aer...ToStep=5-200-5


Plug in a Cd of .145 and you can get within a rounding error of 60mpg at 80mph.
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