Quote:
Originally Posted by DarkSunrise
Someone crunched the math once and the number was more like 1.7x for acceleration. Empirical test data seems to corroborate that as well.
So saving 5 lbs/wheel is more like 20 lbs x 1.7 = 34 lbs IMO.
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I have done the math and got a multiplier of about 1.25x (or 5x if you are talking single wheel weight change) for acceleration. Of course the math is not exact, you have to make some assumptions about the moment of inertia of each wheel and the multipliers are only valid for a given tire/wheel diameter.
So if you save 5 lbs per wheel that is ~ equivalent for acceleration to saving 25 lbs of overall vehicle weight.
On the other hand, adding a pound of tire per corner is ~ equivalent to adding 7 pounds to the overall vehicle weight.
These numbers only consider the effect on acceleration, and not that lower unsprung mass allows your suspension to work better.
Here is my math