Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Differential Change from A 3.46 to A 2.93 -- Intended & Unintended Consequences

Big Dave · 04-08-2009, 08:12 PM

Shawn D: Your final drive ratio drive change had exactly the same effects as mine. A 15% reduction in ratio bought you solid MPG improvements if at the cost of autocross performance.

Overall gear ratio is a powerful tool for improvement of MPG. Too bad so many vehicles are so difficult to effect gear ratio modifications.

04-08-2009, 08:12 PM	#6 (permalink)
Big Dave Master EcoModder Join Date: Jan 2008 Location: Steppes of Central Indiana Posts: 1,319 The Red Baron - '00 Ford F-350 XLT 90 day: 27.99 mpg (US) Impala Phase Zero - '96 Chevrolet Impala SS 90 day: 21.03 mpg (US) Thanks: 0 Thanked 186 Times in 127 Posts	Shawn D: Your final drive ratio drive change had exactly the same effects as mine. A 15% reduction in ratio bought you solid MPG improvements if at the cost of autocross performance. Overall gear ratio is a powerful tool for improvement of MPG. Too bad so many vehicles are so difficult to effect gear ratio modifications. __________________ 2000 Ford F-350 SC 4x2 6 Speed Manual 4" Slam 3.08:1 gears and Gear Vendor Overdrive Rubber Conveyor Belt Air Dam