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where to start
I've been lurking here for a while and figure its about time i start trying out a couple of inexpensive changes. I'm driving a 94 civic sedan with 210,xxx on the odo. I coast in neutral as much as possible, average 65 on my 20mi commute. My tank to tank average this winter (michigan) has been 41 +- 1mpg.
I was thinking about starting with a couple sheets of coroplast from a sign shop ($25 per 4x8' sheet) and shaping an air dam with tire deflectors, under tray and maybe rear wheel fairings.
Which of the above will give me the best gains in mpg? i've read that the undertray is not as necessary with the air dam and partial radiator block.
for those with civics-- how are you attaching the undertray to the bottom of the vehicle? i'm leaving a gap on each side of the exhaust system to allow for cooling and prevent melting/fire. are you just using self tapping screws straight up into the floor of the car?
any general tips/suggestions?
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