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Old 09-19-2013, 08:16 PM   #4 (permalink)
UFO
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Join Date: Sep 2010
Location: Denver, CO
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Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
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How would one change a profile to improve economy? What is the difference in the Metro XFI to the standard one?

What about extending the intake duration into the compression stroke? Would this be a cam used in concert with a high static compression ratio to get the more efficient power stroke without the detonation issues of high intake charge compression?
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