So i know that the getting new wheels doesnt affect the quattro and i know it does affect the speedo a little but thats not a big deal. does getting bigger rims like 18in instead of 16in affect the car like the torque or anything else like that?

 

lol.... o man...

the heavier your rims are, the less performance you will get from the car. more weight equals moving faster slower...

especially when the weight is on something that is rotating (tires)... 20 extra pounds on your tires and rims will affect your car way more than lets say putting a 20lb weight in your seat.

 

It's been awhile since I was involved with the tire industry so hopefully things haven't changed too much. If the outside diameter of the new tiresis the same as the old ones,you'll see no difference in torque or speedometer readings. The taller rims will generally improve performance to a small degree since there is less mass to deal with. The cast rims are generally lighter than the tires themselves so with morewheel and less tire, you should effectively be shedding a few pounds of weight. Ride will suffer a bit due to less tire cushioning. Again, it's been several years since I was involved with tire and wheel dynamics so my old school learnings may not apply to todays new tire and wheelproducts.

 

Check this out when you size your new tires - this will help you keep your rolling diameter as close to stock as possible, to preserve speedometer/odometer accuracy and to keep ABS function close as well:

https://www.audiforums.com/m_384888/tm.htm

Hope it helps.

 

unsprung weight

 

Good'ay,
Can I ask whre you got your rims? I think I like the style (from what I can see in your sig) and would like to see if I can get some in gun metal grey for my car.

 

Rotational mass will effect the speed of the vehicle as well as the weight of the rims... Think of it like this, how easy would it be for you to pick up a twenty pound stick that is two feet long and spin in a circle... Then pick up a twenty pound stick that is twenty feet long and try to spin around in a circle... It will take more energy (power) to spin the longer stick, it goes the same for your engine...

With larger rims usually comes wider tires, the wider the tire the more contact with the road (great for handling)... The bad side about having a wider tire is that your acceleration will suffer a bit (not saying it will be a major amount so dont start flaming me here guys)... The more contact with the road the more friction, the more friction the more drag, the more power it will take to turn the wheel...

Here is some good reading I just found with Google... http://hondaswap.com/general-tech-ar...art-2-a-29058/

SMo'