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  #1 (permalink)  
Old 11-20-2009, 02:17 PM
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Cobra Make, Engine: HiTech Legends GT500
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The idle circuit is what determines for the most part what your fuel economy is at cruise. This circuit can be made quite lean. For example an air fuel ratio of 15:1 is not uncommon at cruise in modern engines. Please note: your engine will not be happy at an idle with an air fuel ratio this lean.

We have one of Keith Craft's 482 getting 15 MPG on the highway, with outstanding driveabilty. It just takes time... and a wide band O2 sensor.
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Last edited by Tom Kirkham; 11-20-2009 at 02:25 PM.. Reason: clarity
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