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Old 10-16-2012, 11:39 AM   #7
His Dudiness
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Originally Posted by suss6052 View Post
It might be simpler than the DCT, but at the same time that lack of a second overdrive ratio really hurts fuel economy at higher speeds (i.e. above 55 mph). The DCT equipped car with the 16" wheels is turning over at around 2600 rpm at 70 mph, the 5MT car with the same 16" wheels is turning over 3000 rpm at 70 mph, or 374 more revolutions per minute, and the gap only increases at higher speeds.

It might be old and dependable, but the gear ratios on the 5MT were essentially the same as my old 1994 Geo Prizm LSI 1.6 L. But that car weighed in at close to 570 or more pounds lighter than the new one, ergo it would be easier on gas in the city than the newer car.
I was just wondering if 17'' wheels on a DCT equipped car would lower that 2600 rpm even more?
Also, can I install 17'' tires but with slightly higher profile - thus increasing overall wheel diameter and lowering rpm's even more on highway? e.g. instead of standard 215/50R17 put 215/55R17 or 215/60R17 or even 215/65R17
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