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Old 11-19-2014, 05:58 PM   #7 (permalink)
kafer65's Avatar
Join Date: Apr 2008
Location: Tennessee
Posts: 284

Silver - '15 Mazda CX-5 Sport
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90 day: 37.23 mpg (US)
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Very interesting. Mazda skyactive engines have revised chassis tunnels to accomodate long headers. Its supposed to keep hot exhaust gas reversion from messing up the high compression. Yeah, why not do to the exhaust what they do upstream in the intake with valving. There seems to be some issues with the valving being robust enough on both ends with some diesel makes. Would an exhaust valve introduce too much drag in this example?

Mirror deletes, 80% grill blocks, wheel covers, 50 psi tires = 6% better MPG avg. over a year. Wheel skirts overcoming ethanol winter fuel mpg losses and more!

Last edited by kafer65; 11-19-2014 at 06:10 PM..
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