Removing winshield wipers. Big difference in cod?
 

Will removing my windsheild wipers make a big difference in reducing aerodynamic drag?

Nope.

I put in a wiper block, and it does reduce wind noise, but I run with sometimes and without others, and there is no noticeable difference in FE. The biggest difference is not having air coming in the vents [without the blower on] when driving (great in the winter, not so great when it's 90+deg out).

i think wipers are the last thing you want to remove... on some cars the rear wipers might have an impact, but i think on most modern cars they don't interfere with the overall airflow.

What about cars where the hood and windshield are almost the same angle?
http://img.photobucket.com/albums/09...gonprofile.jpg
I get very little air coming through the vents without the fan running. I don't think there's much of a high pressure zone there. I took the passenger's side wiper off, but I have no idea if it makes any difference.

http://www.aerocivic.com/imgs/wipers-z.jpg

GasFumes, tuft testing would be really easy to do in the vicinity of your wipers, and you could compare flow across the driver's versus passenger's side.

I really like what Basjoos did on his AeroCivic.

If I were to make a replacement hood for the Insight, this would certainly be done as well.

Jim.

The driver's side wiper parks pretty close to the center of the car. I tried tuft testing with no wipers, driver's wiper and both wipers. All tufts were tight against the glass, with a little more "wagging" on the driver's side. But I saw no difference with or without wipers.

This is with just the driver's wiper, but the tufts looked the same in each test.
http://img.photobucket.com/albums/09...tuftsfront.jpg

I like the pic but I think you need a pic for with and without. To see if there is any change.