The few tests I saw from Tire Rack and Grass Roots Motorsports resulted in differences that were unlikley to be felt unless the driver was some sort of car-whisper freak of nature. I can't find the actual tests on line now (they were a while back) but when I search, I find discussions of the test where people discussed the results.
http://classicmotorsports.com/forum/...e/39037/page1/
Maybe the differences in weight were too small and or the speeds too slow. IDK.
The Ford test is by far the biggest difference I have seen in any test....the kind of results that should easily be felt by an average driver.
When I switch from my stock wheels to my 14.8lb Enkei's, I notice a slight difference in the steering but acceleration is a wash. (By the butt-dyno at least) It's 215's vs 225's so the gearing is different too.
I view wheel weight (and weight in general) as a due-diligence thing. I don't want to have wheels that are heavier than they need to be, but I'm not spending $3k on wheels made from unobtainium either.
This was in street class. Now that I'm in a spec class, the lightest allowable wheels are still cheap.