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-   -   sport suspension (http://www.bimmerfest.com/forums/showthread.php?t=668805)

loso81 01-08-2013 03:05 PM

sport suspension
 
My 09 335i came with 17's on it, should i keep that size wheel on it or go bigger? Also, my car has the sports package and i think the car would look better if it was lowered a lil bit, if i lower the car would it affect my sports suspension?

R608 01-08-2013 05:18 PM

Personally I think 17" wheels look just about right on our cars. 18's are okay, but that's about as far as my taste goes. I also think the ride hight with sport suspension is just about perfect, and even had someone ask if my car was lowered because they liked how it sat. "Nope. That's stock."

I guess it depends on what you like the looks of and how much you're willing to put up with to get those looks. Larger wheels will mean harsher ride and higher likelihood of bending a wheel, which I've found easy enough with 17's. Tires will cost more as well. As for the suspension, if you lower it, you're replacing components (at least springs) with different ones so, yes, that affects the suspension. How it's affected will depend upon the replacement components you choose. FWIW, these cars already sit quite low, and I've scraped my air dam a couple of times in spite of being careful. If you have to use the car in snow, ground clearance is your friend there too, so make sure you consider the trade-offs before changing it.

loso81 01-08-2013 05:26 PM

Xdrive
 
yea i figured that if i lowered it, i would definitely have to get replacement parts, and the car has xdrive so i guess it would be in my best interest to keep it the way it is, have u done any other upgrades to your car. I was thinking about getting the jb4, do u know anything about it. Thanks for the response, i appreciate it. Im a bmw noob just trying to get educated on the "ultimate driving machine"

CALWATERBOY 01-08-2013 05:32 PM

Quote:

Originally Posted by loso81 (Post 7299133)
My 09 335i came with 17's on it, should i keep that size wheel on it or go bigger? Also, my car has the sports package and i think the car would look better if it was lowered a lil bit, if i lower the car would it affect my sports suspension?


You're sure? Comes w/18" wheels + little lower

Read up on alignment re: lowering your ride; tire wear

Zeichen311 01-08-2013 05:41 PM

Quote:

Originally Posted by loso81 (Post 7299531)
...the car has xdrive so i guess it would be in my best interest to keep it the way it is, ...

If the car is an xDrive model it does not have the sport suspension. There is only one suspension setup for xDrive. The sports package on these cars is mostly cosmetic (seats, wheels, etc.) with a few minor performance upgrades (oil cooler, increased top-speed limiter) if all the right option boxes were checked.

Lowering an xDrive suspension, if you are too aggressive about it, may accelerate wear of the front axles' CV joints. Just something to keep in mind because replacing the axles isn't exactly cheap.

R608 01-08-2013 05:41 PM

Sorry, mine is non-turbo and bone stock when it comes to the mechanicals so while I watch with some interest to see what others do to their cars, I can't offer first-hand experience in that department.

I didn't realize your car was AWD. Not sure if it's a coupe or sedan, but I think in either case the suspension is the same with or without sport package. Your interest in lowering it is starting to make more sense suddenly. The trade-offs remain the same, but you probably have a little more room for improvement than you would if you had a RWD with sport suspension. Give it a little time and perhaps others will be able to offer some recommendations for you to consider.

EDIT: Or they'll beat me to it and reply while I'm composing my message. :D

1985mb 01-08-2013 05:44 PM

Quote:

Originally Posted by loso81 (Post 7299531)
yea i figured that if i lowered it, i would definitely have to get replacement parts, and the car has xdrive so i guess it would be in my best interest to keep it the way it is, have u done any other upgrades to your car. I was thinking about getting the jb4, do u know anything about it. Thanks for the response, i appreciate it. Im a bmw noob just trying to get educated on the "ultimate driving machine"

The rule of thumb is that you should use springs and shocks/dampers that are matched to work well together, or get coilovers (which are sorta all-in-one).

loso81 01-08-2013 05:48 PM

yea its a coupe, i was given advice that the xi would be better than rwd because taking off doesn't give alot of wheel spin. ok now i understand what the sport package is. So the sport package has nothing to do with suspension. gotcha

sonitm 01-10-2013 10:44 AM

The sport suspension is already lower than the regular suspension by 1.5 inches or so. Depending ont he roads in your area, an 18 in setup might be a bit harsh on your back. 17 and sport susp. is plenty in my oipinion. But before you make a change, test a car with that setup and see what you think. Also consider that daily driving is different than track days.

1985mb 01-10-2013 11:15 AM

Quote:

Originally Posted by loso81 (Post 7299614)
yea its a coupe, i was given advice that the xi would be better than rwd because taking off doesn't give alot of wheel spin. ok now i understand what the sport package is. So the sport package has nothing to do with suspension. gotcha

Yes, that is true for the X-Drive cars (but not for RWD).

Quote:

Originally Posted by sonitm (Post 7303583)
The sport suspension is already lower than the regular suspension by 1.5 inches or so. Depending ont he roads in your area, an 18 in setup might be a bit harsh on your back. 17 and sport susp. is plenty in my oipinion. But before you make a change, test a car with that setup and see what you think. Also consider that daily driving is different than track days.

The OP has a US-spec X-Drive which does not have the sport suspension.


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