And as far as weight not being important - I recommend you read up a little more - hell look up "Lotus Cars" or "Colin Chapman" over the years they have embarrased heavier/much more powerful cars in races I'm sure you have read about.
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"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower"
-Mark Donohue
