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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Rear Suspension ride height- PLEASE HELP!



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      06-07-2011, 02:39 PM   #45
reprod
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Quote:
Originally Posted by jwise36 View Post
flip4335, thank you for your input, im not hating on you

im just really worried about my drivetrain now, i have an extended warranty on the car though will BMW cover the repair if need be?

if i want the subs its all personal preference, and yes i am a noobie
If you run 235/35/19 and 265/30/19 you should be good to go
235/35/19 and 275/30/19 are better fits (rolling diameter wise) but you run the risk of rubbing especially if you have a coupe. That's all it really comes down to... It's not the tire sizes, it's the rolling diameter that matters.

Both of my xi's came stock from the factory with 225/40/18 and 255/35/18. Not the same tire size but near same rolling diameter.

What tire sizes will Forgestar be sending if they are mounting tires too?
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      06-07-2011, 02:59 PM   #46
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there being mounted at a local shop on hankook v12 evos 245/35r/19 up front 275/30r/19 in the back
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      06-07-2011, 03:26 PM   #47
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To get the best rolling diameter difference you will want 235 in the front instead of 245... Use the tire size calculator in the wheels section of this forum... it will show you the way...
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      06-07-2011, 03:28 PM   #48
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same deal here man.. I'd say I'm lower by about 1".. I have a 12" W7 in a JL box, it weighs about 120 pounds total... I'm just gonna lower the front probably just a half inch when you and a passenger gets in though it looks pretty even actually, I just found this out because of course I always drive, but check it out
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      06-07-2011, 05:38 PM   #49
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thanks man, how do you plan on lowering it? are you not worried about how it will handle with stiffer springs in the front and softer springs under compression in the rear?
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      06-07-2011, 05:42 PM   #50
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do it right or do it twice.
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      06-07-2011, 05:42 PM   #51
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also reprod, i used the calc, thanks for the tip. the % difference between the 235 and 245 is only .3 of a % is that really an issue, i think the shop already ordered my tires
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      06-07-2011, 06:37 PM   #52
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Quote:
Originally Posted by jwise36 View Post
thanks man, how do you plan on lowering it? are you not worried about how it will handle with stiffer springs in the front and softer springs under compression in the rear?
It would only be different springs up front, so the rear would react the same it does now.. and with ZSP, the sub, 18's and rubber band tires, I'm hoping it couldn't get any worse... it's like I'm playing frogger every time I drive down the road, I must look hammered cas I swerve around everything that looks like a pothole, I'm scared to death I will break a projector and my car will offically have down syndrome.. I'm in CPO now so it wouldn't be covered, I've heard NY horror stories about potholes + the xenons

edit: shit now that I think about your post, you just screwed up my entire plan, thx man you suck haha.. just have two friends sit in the front and check out the ride height, it shouldn't be noticeable if you don't know what your looking for, but if your baby is a parking space celebrity then I guess whatever
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      06-07-2011, 07:19 PM   #53
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haha yup, potholes are a bitch, try driving around with a 75 bonneville on 28s!

and no, im not kidding...
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      06-07-2011, 07:25 PM   #54
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What is your box made out of? If its made out of MDF, trash it and make a new one out of 3/4" birch plywood. Its MUCH lighter and just as strong.

Other than that, I dont really see a way to lighten your load.
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      06-07-2011, 10:21 PM   #55
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i would never run w7s with mdf, box is made completely out of birch ply
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      06-07-2011, 11:11 PM   #56
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Quote:
Originally Posted by jwise36 View Post
i purchased the wheels from factory tire in toronto ontario, the rolling diameter is maintained, if i have a problem, ill simply remove the forgestars and replace the factory wheels, then bring in in. my dad has an awd rs4 with a HUGE staggered wheel setup and has never encountered a problem. the wheels will only be on the car for 4-5 months.

why dont you like forgestar?
Great. Now you want to commit warranty fraud.

Is the OP a troll? Only a troll could think that it is OK to mod your audio to the point of affecting handling and breaking bits on the gas tank, then putting on odd sized tires and think it is OK to commit warranty fraud because of his stupidity.
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      06-07-2011, 11:34 PM   #57
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what I don't understand is that if your audio system weighs so much that your trunk drops 1-2', why would you get springs to lower it even more?

as far as the whole staggered set up goes, just use the calculator and get the % to less than 1%..nothing wrong with running staggered set up on xi's, as much as i appreciate people's knowledge on the board, stock sport package for xi's puts you staggered anyways so i'm sure somebody in BMW figured something out (not to say they're always right but i rather trust engineers over back yard mechanics)
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      06-07-2011, 11:36 PM   #58
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Quote:
Originally Posted by ceb View Post
Great. Now you want to commit warranty fraud.

Is the OP a troll? Only a troll could think that it is OK to mod your audio to the point of affecting handling and breaking bits on the gas tank, then putting on odd sized tires and think it is OK to commit warranty fraud because of his stupidity.
not that i agree with op but talking about warranty fraud would incriminate a crap load of members with mods
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      06-07-2011, 11:59 PM   #59
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fraud is the way to go, gets you out of everything.........

kylekuu, relax man, im kidding, im running the correct tire widths so the rolling diameter is only .7% different. as for the audio, for the driving i do, my handling has not been effected (im not running the car at tracks), sure it may be a tad bit slower but nothing an AA tune cant fix. it has only dropped the rear about 1 inch if that, no different from riding around with 2 adults in the backseat

im not getting lowering springs, if i did i would only use them on the front, if that were to affect ride quality which it most likely would i would use them on front and rear but because lowering springs are stiffer the "rake" between the front and rear would be closer (gap between tire and fender similar to rear).

i love my car and would never change a thing!

Last edited by jwise36; 06-08-2011 at 12:16 AM.
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      06-08-2011, 12:02 AM   #60
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and ceb, haters gunna hate.
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