i noticed that he changed tires, but i relied on his driver feedback [
which is what the engineer is supposed to do: listen to the test driver or the test pilot]. to quote him:
"But, in doing this test, I definitely think the compound of the tires isn't that far off. The Pirellis are definitely soft, just not quite as soft as the Azenis'."
"It's obvious to me that the rotational mass was the factor to get moving quicker (this is also why the first run on the 17's was significantly slower, it bogged a little at just above 3000rpm)."
i just tried to estimate what effect the weight reduction would have, all other things being equal.
i never said .2 isn't significant. hey, i may buy centerlines and lighter tires myself for the street just to get it.....but there are some guesstimates around here about how much 0-60 improvement you can get just by lightening the wheels and tires. and the answer isn't 2 seconds (to get you down to 5 seconds 0-60.)
you'll have to take weight out of the chassis and/or add horsepower.
