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There's a chart here to give an idea of how much even a small change in restrictor plate venturi size affects speed...
http://www.jayski.com/stats/restrictor.htm
Hmmm, then I guess that there have been hundreds of drivers killed huh? I'm not quite sure how many guys have driven since Earnhardt has been dead, but maybe you know of the hoards that have been killed.
I just don't quite understand why you people who hate plate racing continue to watch those races. If I hated those races as much as y'all did, I'd be doing something else on the days they raced. As I said to someone else, why not go watch yer kids play soccer and quit yer bitchin.
No I saw the same chart,You must be looking at a different chart than I was able to bring up.
According to the one I see, restrictor plate size directly affects top speed.