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01-02-2015, 04:26 PM | #23 |
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I have had a 335 with sport suspension before this car and the 335 never felt right to me in stock form. It felt very soft and cumbersome in addition to a harsher ride (even with a longer base) on the RFTs (thats the best I could describe it), it went like a rocket in a straight line but super hard for the tail to break loose as well (felt super planted at speed). The braking was also sub par compared to the 1er.
As others said somethings wrong with the setup on your 1er, did you get a stealership /performance oriented shop alignment done as well? Maybe that would solve your handling issues? I did notice the year of the car as well. Maybe some of the other bushings are tired as well (drivetrain since it shimmies on acceleration or the rear multilink)? That could cause her to be floppy. |
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01-03-2015, 11:01 AM | #24 | |||||
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Let's just say I was disappointed.
This is my experience. Quote:
They do make a difference, not enough of one to satisfy me (especially given the cost). Quote:
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01-03-2015, 11:04 AM | #25 |
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I don't think anyone understands what I am saying. The car does feel better, it is more stabled and planted, it does however still exhibit excessive side to side flex. This is especially apparent when taking an onramp and merging into highway traffic and switching lanes... It is unbelievably annoying.
How do I know everything is done right? I have a set of 17 inch winter runflats and the car exhibits none of this and feels like it should. The car is clearly designed for runflats and the shorter chassis makes everything worse. Conversely, my 3 series never exhibited any of this and the only upgrade it had was the same tires as I have now. Like I said, these are my thoughts... If I had to do it again, I would be an M Sport 335i from the same year.
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01-03-2015, 11:24 AM | #26 |
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Maybe you should sell the one and buy the 335. Problem solved.
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01-03-2015, 11:40 AM | #27 | |
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Also... what is your rear toe? Sounds to me like something is outta whack.
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01-03-2015, 11:41 AM | #28 |
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+1 I track my car a lot, and I can definitively say my car handles better the PSS's.
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01-03-2015, 12:15 PM | #29 | ||
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01-03-2015, 12:16 PM | #30 | |
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01-03-2015, 12:50 PM | #31 |
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If the car is fine with the run flats on then install them. There are many on here that don't have an issue as you describe so something gives. I own both an e90 and e82 so can easily compare the two. I don't feel what you are talking about.
The run flat tires seem to get a beating on these boards for reasons I don't fully understand. It almost seems like people are embarrassed to admit they prefer them. They have stiffer sidewalls and tend to be more responsive than non run flats. I'm not running them but only because I track my cars and their ultimate grip on the track isn't as good as alternatives out there. In any event if the problem isn't present with them and the issue is significant enough in your mind then switch.
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01-03-2015, 06:33 PM | #32 |
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Weak or worn trailing arm bushings can cause toe out under hard accel as can bent or flexing trailing arms. There are spherical bearing replacements that can minimize the problem. And weak or worn toe arm bushings can lead to similar problems, I think.
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01-06-2015, 04:09 PM | #33 | |
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The shop I had my bushings replaced didn't mention anything about replacing the bolts, they have maybe replaced 30+ cars... Or is it a matter of time they break?
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01-06-2015, 04:52 PM | #34 | |
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01-06-2015, 05:37 PM | #35 | |
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All aluminum bolts (painted blue head) should be replaced not reused. Steel bolts that are torqued to a torque value, plus a specified rotation angle are (potentially) permanently stretched and should also be replaced not reused. Generally steel bolts that are not tightened more than the maximum permissible specified in DIN 267 have not been stretched and can be reused. I have reproduced the maximum torque value list from the Bentley 3 Series Service Manual (under the fair use doctrine - great manual, you should get one): That said, BMW and thus Bentley do recommend replacing them, but there isn't a really compelling technical reason to do so. |
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01-06-2015, 08:45 PM | #36 |
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I think Dack is on the right path. Oddities in the alignment can be responsible for what you are feeling. I recently had mine set, very slight toe in both front and rear, and it made a noticeable difference to how the car felt and drove.
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01-16-2015, 04:32 AM | #37 | |
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I have the BMW PS with Koni yellow external adjustable. I added the Whiteline inserts first, somewhat better but not what I wanted. Added M3 front parts and M3 subframe bushings and it was much better but still had the rear bump steer and torque steer like you describe. Just installed the rear M3 upper control arm, guide arm and Rogue Engineering toe arms and that got the handling problems solved. Glad to be finished! |
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01-16-2015, 08:14 AM | #38 | |
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Aftermarket adjustable toe arms are on my short term wish list, to deal with added torque from Quaife 3.46 FD LSD, and custom tune + FBO.
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01-16-2015, 10:12 AM | #39 |
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1 day and no noises, too early to tell about long term. They do have rubber dust boots over the Heim Joint.
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01-16-2015, 03:19 PM | #40 | |
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01-21-2015, 07:59 PM | #41 | |
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How do you quantify the difference between doing two and four bushings? Well, that is kinda tough. |
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02-08-2015, 11:10 PM | #42 |
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Any idea on which of these parts or what would be most effective to correct the rear side to side flex? My car no longer bounces up and down as the bushings and konis fixed that but on hard acceleration and lane merging, you can feel the rear flex and move side to side substantially? What would help alleviate that the most?
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02-09-2015, 08:45 AM | #43 |
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I'm trying to figure out why this is the case but not with non-rft's.
What tires do you run? I'm guessing they are good but... what if they aren't? Some sort of internal damage? If they're directional is one of them installed such that it's not rotating the correct direction? Is it simply the tread pattern you're feeling (much like I do w/ my winter Blizzak's)? Could be something else, tire related or not the tires at all but - if it's tied to one set of tires and not the other, I'd focus on the tires. |
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02-09-2015, 09:03 AM | #44 | |
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With the rft's, the up and down bounce no longer exists but the side to side flex does. With the pss both the up and down bounce and thr side to side flex exists. And trust me, with the latter it is in some cases still unacceptable imho.This is after Koni Yellows and M3 rsfb's.
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