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BMW 3-Series (E90 E92) Forum
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Serious Anti-Sway Bar Talk
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11-08-2011, 07:06 PM | #23 |
Freight Dawg
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Usually people don't by it alone. They buy it with the suspension kit. That's what I did.
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11-08-2011, 07:09 PM | #24 | |
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11-08-2011, 07:44 PM | #25 | |
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11-08-2011, 08:05 PM | #27 |
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w/o reading this whole thread, put your c/o on first and go from there.
If you still want to increase rear roll bar, BMW makes a 14mm and 15mm rear bar.
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11-08-2011, 08:22 PM | #28 |
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Hotchkiss' rear bar is a 16mm. That is what I am putting on mine. I already installed the front and was waiting for my LSD to come in too before I install the rear.
I will have my ZSP sways up for sale soon if you are interested. |
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11-08-2011, 08:52 PM | #29 |
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Roll bar springrate. Assuming same dimensions.
13 mm ... 24 lb/in 14 mm ... 32 lb/in 15 mm ... 42 lb/in M3 ....... 109 lb/in 20 mm .. 133 lb/in
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2007 328i ZSP. M3 suspension: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.
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11-08-2011, 09:43 PM | #30 |
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The E93 is also supposed to have a 15mm rear bar; not sure if it's the same bar. A BMW dealer could tell you.
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
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11-08-2011, 10:48 PM | #31 |
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I have stage 3 on mine. I ran it with stock stagger at first. Then I ran it with a 245 tire up front. Made a huge difference but Dinan tuned it that way so it makes sense. Rides like crap though.
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--Marcelo
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here! | Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors |
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11-08-2011, 10:53 PM | #32 |
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11-09-2011, 12:01 AM | #33 | |
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As for the straights... the sway bar does not do anything in straights, it only works when an asymmetrical load is received by the springs (cornering, or hitting bumps with only one side on the car, or 3-wheeled inclines ;-) ). I actually loved my stiff RSB's on the golf given it's inherent understeer during acceleration, best by far being the Shine. I never upgraded the front sway because a stiffer one makes the car understeer more. So while I am scrathing my head over the thick M3 bar, given the V8 in that car - which would cause even more understeer - I'm figuring the lighter N52 I6 will then maybe oversteer a little ? Having said that, I might do the rear first and then see how it compares... (but I'm also upgrading to M3 control arms). One other thing is while I'm on the 18" staggered and the wider patch should have more adherence, I'm slipping in corners if I drive out it harder. So while some say this is a 335i issue, it is present in the 328i as well (even with the OEM sport susp). The stagger effect is another debatable issue, some say it worsens the dynamics some like Harold say that is not true. After all f1 cars are like that for a reason, granted the suspension there is way beyong anything on-street. |
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11-09-2011, 12:48 AM | #34 | |
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I put a 28mm RSB on it, car handled like a dream. Front had lots of feel, while the back cooperated nicely. However, on a highway straights, back was very gittery from the thick RSB, due to restricting individual side movements of rear suspension. My e90 currently does have good feel, due to having a balanced RWD chassis, but I can feel it could be so much better. With DTC on, back does slide out easily on wet surfaces. However, during everyday driving, I can feel the back end is a little "lazy". So that's why I am going after RSB to get the right feel. I know it's an expensive installation and want to get it right the first time... |
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11-09-2011, 10:22 AM | #35 | |
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On the subject of stagger, keep this in mind. The e90 335 and 328, 325, 330 all have the same sport suspension and alignment and tire stagger and all have different power outputs. Older BMW didn't do this. A 530 sport had a square setup and the 540 had only 20mm of stagger. Not sure why a 325 has 30mm of stagger and 215hp. F1 cars have 800hp. Can you tune the suspension to work with the effects of the stagger and lack of power? Sure. This is what Harold is getting at. It's just not my preference. You have to make the rear so stiff and add lots of camber to the front. Stock for stock a non-sport has way better balance than a sport even though it has lower limits.
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'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here! | Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors |
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11-09-2011, 11:36 AM | #36 |
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11-09-2011, 12:36 PM | #37 | ||
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11-09-2011, 09:07 PM | #38 |
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11-12-2011, 05:22 PM | #40 | |
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I have KW Series 1 with Michelin Pilot Super Sports and the ride is at least as good if not better than stock with runflats.
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11-12-2011, 05:53 PM | #41 |
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I changed out of RFT's recently..best thing I've ever done, till I get a flat tire at least...
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08-20-2012, 08:13 AM | #42 | |
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08-20-2012, 09:05 AM | #44 |
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