I did some prototyping, after reading that airdam should be as low as lowest part underside car and not more, I decided to put sheetmetal airdam, I readlly needed only about inch more over car's stock version and bit wider to guide air past tires, there should of been more curvature at ends, but had no time to make everything perfect, it is some scraps from roof building, screwed into bottom of bumper, it follows arc of bumper and enough for prototyping I guess.
Could use a splitter though.
Then I modified mudflaps and made them smaller.
I did put 'spoiler' on hood, rear part of hood I duct taped some cardboard, bit less of angle than what windshield is, it is about 6 inches long (font-rear wise) rear is lifted about 2 inches. Maybe tiny bit less wind noise, but no really big effect, imo. Maybe it should be more towards rear so that it is almost touching wiper arm, but I was afraid it would interfere with wiper then. Must examine this bit more before building final version, there is no more than inch of gap.
Then I did turn passenger mirror against window, cardboard and ductape made nice shield for hinge mechanism so it would not be so horrible aerodynamically.
Antenna was removed, that was forehead of roof.
Hubcaps installed to front.
Rear wheel wells were covered with duct tape and cardboard, also made bad attempt of partial kammback from cardboard and duct tape, cardboard was not best quality and it was curved, could not straighten it so sides were higher than middle, even I did added some supports that did not helped to get it straight from middle, so it might be better too.
Had not chance to make extensive testing, I did test that they should stay on place safely, there was quite bit of wind with very strong gusts so any proper testing would been pointless.
Can't really feel huge change, but then again at 50MPH there probably will not be huge change, however I did constantly overshoot my estimates when coasting, making need to use brakes where speedlimits did change, also wind seemed not to grab car quite so strongly as before, but I consider these feeling rather pointless, it can be that all changes just added as much weight than what possible gain there might been if any and as weight improves coasting too, it might been that also.
Forecast shows no rain for long time, so I'm hopeful that I can keep prototypes on for my next business trip, then if weather really stays similar, I could get nearly 600 miles of test driven on same roads that I did last tank of fuel, maybe improvement shows there or then not.
However for that trip I will need my passenger side mirror as it is really difficult to drive without one, it is like driving one eye closed
