DIM

I am inclined to buy the Vossen Wheels CV-3 ( it weight 28 ibs against OEM wheels 24ibs) because of the price but I am afraid that due to the additional weight of the machine will accelerate worse.

Who thinks that?

And 245/35 R20 front and 275/30 R20 rear will fit correctly? They recommend 245/30 and 285/25. Because i don't want to roll fenders but i will use KW3

CalitriSC

iTrader: (13)

Its highly unlikely that you would notice any difference in acceleration. I have 20x9.5 front and 20x11 rear with 295s and my car does not feel any different. Depending on the offset of the Vossens you are getting, the 275s should fit in the rear without a roll. But i would confirm with someone else who has those wheels on an IS-F.

HenryLee

iTrader: (2)

You wont feel much difference. Its more important if you track your car.

DIM

IF im not mistaken specs are 20x9 +38 and 20x10.5 + 45.
For me important acceleration 0-60 for drag racing))

DIM

I understand that i wont feel much difference. But i'm afraid that i will see it on drag results
I would like to achieve 11.9 in future ( Headers, intake, joez exhaust)

streetx

iTrader: (4)

why not just keep you stockers and just use those for the track or get another set of 18" for the track

MRxSLAYx

The new rims will definitely slow you down, but the main difference will be due to tire size. Its going to be difficult to pull off a good 60' with rubber band tires...

mugenh22a4

iTrader: (9)

If quarter mile times are more important for you, then I think you already know the answer...lighter is better.

CaptAwsm

Agreed.

ISFSteve

I have not run the numbers before or after but I can tell you that the car runs very well with my new set up and cannot tell any difference in acceleration. Not saying there isn't a change but if there is, I bet it is next to nothing. If I were you, put a set of track tires on the stock rims and buy the CV3's as you will absolutely love the look of the car with them. I feel pictures don't capture the whole effect of these rims and it is a must see in person.

Unless you drive with adults in the back often, you may find with 285's in the rear, there is no need to roll the fenders. Full tank plus two adults may experience some rubbing depending upon the driving conditions with the stock shocks and ride height.

Super6

iTrader: (1)

Moving weight vs. non moving weight is much more significant. Ie the power to move 4 lbs in your wheels is vastly different than the hp required to move 4lbs in your cabin...what that equates to in a 60 or 1/4, I am not sure. It it sure isn't faster. Those wheels look great though...

MisterSkiz

iTrader: (2)

Buy 65k car with bbs forged aluminum wheels........replace with heavy aftermarket wheels.

mikefate

If you want to drag race, you'll need slicks. And a Chevy.

MisterSkiz

iTrader: (2)

Pretty much all my 06 gto was good for.

rtr01

unsprung weight is the easiest to notice a difference. with heavier wheels your suspension will not be able to work as efficiently, changing the ride, you will not be able to brake as well, and you will not be able to accelerate as fast. also fuel consumption goes up. with a bigger rim you also get rougher ride just from the tire profile. since the rims are also bigger the weight is farther from the center axis of the wheel, compounding this effect even further. spin in your office chair sitting straight with your legs tucked in, then stick your legs out slowly. that is what happens when you add weight to something that spins, the rotational inertia goes up exponentially making it harder to maintain rotation.

if you are an average driver you may not notice any difference at all. but your car will perform worse than stock i guarantee you that.