Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Best approach for aero improvement on sedan roof?

19bonestock88 · 07-14-2016, 09:22 PM

I think that even if I only gain 0.5% in fuel mileage due to drag reduction, the ROI will be nearly instant; I spent nothing on this at all, not even the tape to hold it to my roof was purchased...

However, I might end up building a Kamm-back extending to the end of the trunk lid if I can get some materials...

I found a shop that can sell me sheets of coroplast for $25 each, and they can order AlumaCorr for $120 a sheet(too rich for my blood)... Once I decide on whether the VGA is actually working or not, I'll see about designing a Kamm-back that hinges with the trunk(but doesn't come off in wind)... However, that'll be after the belly pan is finished, and other, simpler gains are pursued...

07-14-2016, 09:22 PM	#40 (permalink)
19bonestock88 Master EcoModder Join Date: Jun 2016 Location: KY Posts: 1,352 IGL - '04 Saturn Ion Team Saturn 90 day: 56.19 mpg (US) Thanks: 63 Thanked 366 Times in 269 Posts	I think that even if I only gain 0.5% in fuel mileage due to drag reduction, the ROI will be nearly instant; I spent nothing on this at all, not even the tape to hold it to my roof was purchased... However, I might end up building a Kamm-back extending to the end of the trunk lid if I can get some materials... I found a shop that can sell me sheets of coroplast for $25 each, and they can order AlumaCorr for $120 a sheet(too rich for my blood)... Once I decide on whether the VGA is actually working or not, I'll see about designing a Kamm-back that hinges with the trunk(but doesn't come off in wind)... However, that'll be after the belly pan is finished, and other, simpler gains are pursued... __________________ My current Ecotec project... My last Ecotec project...