Just wondering what kind of a difference wheels will make on a cars' acceleration.
Can anyone compare size and weight, and tell me what diferences they have? And how much of a difference they have?

 

Wider tires (wheels) =better traction=better times.
Keep the same O.D.and get lighter wheels.

 

Well I dropped about 8lbs per corner on my last car going with aftermarket wheels and tires and I can tell you that it made a noticable difference. Not as much so with raw acceleration but more along the lines of making the car feel much more agile. Puching it from a roll is where you will see the biggest difference

 

Also, moving to a larger diameter wheel (16" to an 18" wheel, for example) will move the main weight of the wheel further out from it's center. This is bad because it takes more energy to speed up the larger wheel and slow it down. This affect acceleration and braking.

This even holds true when the wheels are the same weight, just different diameters. Don't forgot that normally, going with a larger diameter will also add a significant amount of weight as well as moving the mass of the wheel farther out.

 

My old AP1 was slower with 18's on.

 

I took stock wheels off a 350z saving 7-8 lbs. per wheel with aftermarket Nismo Racing wheels. I was amazed that I barley detected any difference. I have a very sensitive butt dyno and I was expecting a noticeable difference in acceleration with this much unsprung weight savings. Of course, handling was a different story. This is why for the first time I am not that itchy to immediately put aftermarket wheels on the S2K. The stock 04 OEM's are much better looking and lighter than most. SG

 

get some gold Advan racing 18s Light baby! Lighter than the Ap2 rims.

 

I guess you like your new wheels.
Post pics.

 

For every 1lb you add in weight to your wheels, you effectively add 8lbs in unsprung/static weight. For example, if 1lb was added to each of the four corners of your car, it's like adding an extra 32lbs. And this isn't even putting into account rotational mass yet (when upgrading to larger diameter wheels), where the weight effect rises exponentially.

Probably more than you guys wanted to know, but it's never a bad to get a quick physics refresher.

 

Reducing wheel/tire weights will primarily benefit handling -- not acceleration.

Thanks,
Richard