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Control Arm Bushing Upgrade for XI?
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05-31-2015, 07:59 PM | #23 | |
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05-31-2015, 09:34 PM | #24 |
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Didn't want to go to hard with the yellows, but I may switch in the future from red to yellow. The grease should have come with the bushings. I know if you can press in the red ones, then you should be able to press in the yellow ones as well since they are harder.
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06-01-2015, 08:19 AM | #25 | |
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06-01-2015, 11:57 PM | #26 |
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I am extremely happy I did not order new upper/lower control arms. I was 100% convinced they were shot but my wheels just needed to be balanced.
I will still throw these on since my friend can probably throw these on for $20-$30. How hard of a job is it if you have a press? |
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06-02-2015, 12:52 PM | #27 |
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These guys offer Lemforder arms, and are working on a beefier xi-specific front control arm, with proprietary spherical bearings. i have no idea on pricing, haven't looked that far into it, but these arms on my to do list
https://www.facebook.com/SyncroDesig...o?tab=overview
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06-02-2015, 09:19 PM | #28 | |
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06-03-2015, 09:22 AM | #29 | |
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granted, these arms/bearings are massive overkill for a street car, but so is 400 AWHP so
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06-03-2015, 09:25 AM | #30 | ||
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07-23-2015, 11:06 PM | #31 |
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I may not have been as liberal with the left side as I was with the right, that may be why there's only noise from the one side, I tightened them with load using a jack.
I don't know how these guys are saying they can be pressed in, I used a saw and cut them in half, had to get the old ones pressed out. I live in Colorado and they showed up pretty quick, less than two weeks. All of my related issues have been taken care of, and the car feels nice and tight. Unfortunately still no confirmation on the wheel hop, car has been having major trans issues so I've been dealing with local shops to get that sorted. But now when I brake at low speeds the front wheels have no movement in the wheel well like they used to. Oh and 400awhp isn't even enough ha. EDIT: Trans problems were somewhat sorted out enough to beat on the car a little. No more wheel hop.
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IDKWHP|IDKWTQ Last edited by UsedF10M5; 08-14-2015 at 09:35 PM.. |
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07-28-2015, 08:27 PM | #32 | |
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They make a huge difference in how the car handles and feels and drives, especially at speed. The higher the speed the more apparent how inadequate the factor bushings are becomes more obvious. Under braking the car would sometimes pull as much as a couple feet over to one side at highway speeds. That can be very dangerous! Not to mention the lack of direct response when turning the steering wheel quick, as well as the car wanting to follow every grove in the road in every direction but the one I wanted. Now the car is tight feeling, responds well, has more feel at initial turn in as well as while taking a hard corner. Now it's tracking straight when braking, even hard. The car feels like it leans over much less, which must be true given how much the stock bushings move. So much more stable and confidence inspiring. I've done this same upgrade in a couple other cars I've owned and it was always one of my favorite mods. In my 335Xi it is an amazing upgrade considering how overly soft the factory bushings are to help make the sport sedan more compliant for the average driver. The car is transformed and now drives and feels how it should have been from the factory. (I know, cliche statement for mods but so true) Well worth every penny!! Oh, and for s & g's I had the factory bushing pressed out of the metal sleeve to compare to the Strongflex Sport bushing. Notice all the voids in the factory bushing and how much more beefy the upgraded bushings are!!! ? |
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07-28-2015, 11:05 PM | #33 | ||
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07-29-2015, 06:30 AM | #35 | |||
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Tire choice can also affect wheel hop in my experience. Hard tires and/or high tire pressure can increase wheel hop. Often a softer tire (both compound and sidewall stiffness) has decreased wheel hop. At the drag strip lowering tire pressure would also help. Albeit these are only factors in the cause of wheel hop, so your experience with tires may or may not be similar. |
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07-29-2015, 03:23 PM | #36 |
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The only difference between RWD and AWD trust arm bushings is the width. RWD bushings are 10mm wider than AWD. The diameter is the same.
I used Whiteline Poly bushings (for RWD) and cut 5mm off each end and cut 10mm off one side of the metal insert. Greased with cooper antiseize and no noises since Spring of this year. I didn't have the correct diameter tool to press the bushings out so I used a 3" hole saw. Worked perfectly. Last edited by matteblue3er; 07-29-2015 at 03:30 PM.. |
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07-29-2015, 03:27 PM | #37 | |
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Not to mention the issues that arise from using heim joints/spherical bearings on a street car.... |
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08-03-2015, 05:24 AM | #39 |
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Reading this thread with much interest. Was under the car recently and noticed both tension strut and control arm bushing are shot. Hit a big pothole recently and that may have done them in. Does anyone make or can something be made to fit the control arm?
Terminology is confusing among vendors. Strongflex only makes one bushing for XI, the ones being discussed in this thread, called for example "lower tension strut" here: http://www.ecstuning.com/BMW-E92-335...l_Arm/ES49241/ I ordered a set of their yellow version just now. What I want to know is does anyone make similar for the "lower control arm", or can something be trimmed to fit like the tension strut bushings? http://www.ecstuning.com/BMW-E92-335...l_Arm/ES49244/ I can't find any, but it does look like Whiteline, Powerflex and others make the corresponding part for non-XI, eg: http://www.whiteline.com.au/product_..._number=W53453 But comparing pics it looks like it is a much smaller diameter bushing, here is 335i "front control arm" http://www.ecstuning.com/BMW-E92-335...l_Arm/ES49250/ If not I guess I've have to replace the whole arm with OEM equivalent (both sides). |
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08-03-2015, 10:58 AM | #41 | |
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BTW it looks like both LCA and TS have fluid-filled bushings, at least if the grease splatter/leak pattern on mine is any indication |
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08-22-2015, 03:18 AM | #42 | |
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My case isn't ordinary, but there are cases where these bushings are the right solution. https://www.facebook.com/SyncroDesig...383657/?type=1
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08-31-2015, 03:06 PM | #43 |
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The custom front bushing from strongflex was for me, its on my car right now.
Its not really needed as the front control arms for the XI use the same type of bushing in them that the rear M3 arms do, but if you want to replace it you might contact strongflex and see if they will make you a custom one like they did for me. I had ordered a set for the non XI because their web site didnt say "not for XI" but found they didnt fit, so I told them and they updated their web site, then they were kind enough to offer to make me some custom ones if I sent them the control arms, so a bought a set of new control arms, shipped it to them, they made them, then shipped it back and I put them on. Because of customs in poland that was about a 3 month adventure, but they work great.
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Last edited by shushikiary; 09-01-2015 at 03:33 PM.. |
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08-31-2015, 08:12 PM | #44 | |
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