Heavier Rims

[moneyshotz]

I just got some new rims that weigh about 5 lbs heavier than the stock rims each. How much will my 1/4 go down by?

[GoodOneStu]

What is the weight on the stock rims?

[Bass482]

19.5 lbs.

[moneyshotz]

yea my rims now are 24.5 lbs

[AZ3.8Camaro]

I think I read somewhere that 100lbs is about .1 Seconds. I could be wrong on the equation though. About .02 Seconds or so. If you got better tires, you may decrease the time though!

[Slow-N-ugly]

The formula is a basice quesstameta but 100 lbs, or 10 HP is good for .10 th in the quarter. That is pretty close until you get down in the 12-13 sec range.

[TheBeast]

the 100lbs rule refers to loose weight in the car. for every 10 lbs of rotational mass it is thought to account for .1

so a total of 20 extra pounds amounts to .2

now, that is just the rims, are you using the same tires? or is this rim larger in diameter/width? if you are moving from a 16 to 17 inch rim then you also need to weigh the tires. my 17" rims are only 1/2 a pound heavier each compared to my stock 16s, BUT, the tires each weigh about 12 pounds more, which amounted to about a 50lb weight difference. Last week I was running 15.5 on my 17's, switched to 16's and ran 15.0