Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Does lift reduce rolling resistance significantly?

California98Civic · 07-23-2011, 01:50 PM

I suppose it must, and that it becomes dangerous at some threshold because cars don't have wings...

but if I add a belly pan and add lift as a result part of my FE gain might come from reduced rolling resistance? I would assume cars are designed with the assumption their owners will speed sometimes far above 65mph... but what if I never speed and allow my car to have more lift than originally designed? I gain FE, it seems. No?

07-23-2011, 01:50 PM	#1 (permalink)
California98Civic Cyborg ECU Join Date: Mar 2011 Location: Coastal Southern California Posts: 6,302 Black and Green - '98 Honda Civic DX Coupe Team Honda 90 day: 66.42 mpg (US) Black and Red - '00 Nashbar Custom built eBike 90 day: 3671.43 mpg (US) Thanks: 2,374 Thanked 2,176 Times in 1,471 Posts	Does lift reduce rolling resistance significantly? I suppose it must, and that it becomes dangerous at some threshold because cars don't have wings... but if I add a belly pan and add lift as a result part of my FE gain might come from reduced rolling resistance? I would assume cars are designed with the assumption their owners will speed sometimes far above 65mph... but what if I never speed and allow my car to have more lift than originally designed? I gain FE, it seems. No? __________________ See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.