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Old 12-04-2015, 08:43 PM   #60 (permalink)
ConnClark
DieselMiser
 
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Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
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Quote:
Originally Posted by PaulB2 View Post
Seems to me this car relies a bit on a ram air effect...
Relies.... No. Benefits ... probably.

Gas cars benefit from power with ram air because it can help pack more air and fuel mixture into the cylinders. If memory serves me right you can get about 0.15 psi of boost at 70mph. I admit thats not a lot but can equate to about 2 to 5 hp depending on the engine.

A diesel car will benefit in both power and economy as excess air boost efficiency.
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