I have chrome wheels that weigh approx. 60 lbs each. If I swapped those for billet alum wheels at 20lbs each, what kind of e.t. reduction/mph improvement do you think I'll see?

 

Not sure about the equations but I know that when my ASA's are on I lose a little performance due to the extra wheel weight that I have to turn. My wheel/tire combo weigh 70lbs each compared to the 50ish pound stock aluminum wheels.

 

I saw a recent Motor trend magazine test that compared a SUV's acceleration with 17" wheels and 23" wheels. The 0-60 acceleration with the 23" wheels was .9 of a second SLOWER! Almost a full second!

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MarineBlue03GMC:
<strong> I saw a recent Motor trend magazine test that compared a SUV's acceleration with 17" wheels and 23" wheels. The 0-60 acceleration with the 23" wheels was .9 of a second SLOWER! Almost a full second! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Wheel diameter isn't the only factor however, wheel/tire combo weight is a major factor in the amount of power it takes to turn the wheels. I would say more so than wheel diameter.

 

i am not sure where i got this info and it is definately a rough estimate and just acounts for weight not diameter.

each 100lb/s is 1/10ET reduction in the 1/4 mile and for rotating mass like the wheels you double that. so for your example it would be about 3/10's just because of the extra weight.

 

i have seen this estimate about weight too. i also know that 1lb on a wheel or unsprung weight is equal to 5lbs of weight on the car.