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Old 03-24-2010, 11:50 PM   #1 (permalink)
Fr3AkAzOiD
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Join Date: Jul 2008
Location: Raleigh, NC
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Cobalt XFE - '08 Chevrolet Cobalt XFE
Team Chevy
90 day: 41.1 mpg (US)

'05 Malibu V6 Tow Vehicle/Track Car - '05 Chevrolet Malibu LS V6
90 day: 23.12 mpg (US)

'08 XFE average for 2013 - '08 Chevrolet Cobalt XFE
90 day: 41.1 mpg (US)
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mpg gains with underdrive crank pulley?

I know an aluminum underdrive crank pulley will be lighter weight then stock, 1.3 lb vs 3.6 lb and the smaller size will help reduce accessory drag.

I know this will not only free up some hp but also give you mpg gains as well.

Given that at 50 mph I get about 50 mpg would you guess are we talking a miniscule mpg increase of 0.5 - 1.0 mpg or something more around 1.5 - 2.5 mpg gained?

Here is the part...
5 ribs - Ecotec Underdrive Crank Pulley - 2.0LNF/2.2/2.4: by Make and Model - Chevrolet - Cobalt - NA Ecotec UDP - Car Performance Parts And Auto Accessories | MRZ Performance

I know I'm talking several years before breaking even but was just curious.

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