I tried doing a search but couldn't find too much information..... One coast down test posted a long time ago stating that open front windows on a boxy 80's hatch causing 1.5% greater drag at 65 mph, but that surely would change with modern cars.
Car in question is a 91 crx HF. I run with the windows all the way down to keep cool, and am looking to cut the drag as much as possible caused by the parachute effect this creates. The options i have are
1) get rain deflectors, force the air around the window. Probably is not effective in turns or above 50 mph, but probably still better than nothing.
2) remove the rear hatch glass (4" by 24" window above the bumper), and allow any air that comes inside the car to fill the low pressure zone behind the bumper.
I don't think coast down tests would be able to provide the resolution necessary to test some of these items. Perhaps i can fit an engine management system and monitor injector duty cycles and back calculate the fuel required to maintain 80mph with each..... Hmmmm....
Please chime in with any experience or suggestions
