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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Sway bars for the 335i?



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      08-19-2007, 02:32 PM   #45
stressdoc
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I wonder if we could talk a group of the vendors into sponsoring a comparison test of the different mods many of us are puzzling over.

Ideally we could just get a half dozen or so E9xs together with different suspension set-ups and swap cars around over a set road course, and then get some stats at a track.
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      08-19-2007, 02:38 PM   #46
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Interesting idea, but I dont think I would feel comfortable ringing out someone elses car.
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      08-19-2007, 03:00 PM   #47
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Interesting idea, but I dont think I would feel comfortable ringing out someone elses car.
No doubt it would have to be a 8/10ths affair. But at least we would have better info on street drivability.
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      08-25-2007, 03:13 PM   #48
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Any sway bars yet for the 335xi?
Anyone know?
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      08-27-2007, 04:40 PM   #49
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Anyone have a suggestion on how to dial out the understeer? I have a 335i E92 with sports package and it understeers like a mofo on the track. I much prefer oversteer. As it is now, when you give it gas on a fast turn, the car just plows rather then turning in closer to the ideal line.
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      08-28-2007, 11:37 AM   #50
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Hey All,

I just came back from a weekend at Thunderhill with the UUC Swaybarbarians. I've done 4 track days previous to this so I do have a reasonable frame of reference.

I have them adjusted full soft on the front and medium on the rear. The roll is significantly reduced and turn in is sharper. I would highly recommend them as an incremental suspension mod.

Long med. to high speed sweepers were faster and more managable with throttle steering. Low speed turns were better due to the car being flatter and getting more grip on the inside wheels.

All of this and the general ride quality isn't sacrificed much at all.

I'm glad I did it.

UUC is a great company and I am extremely impressed with their level of care and service. The product is very high quality and there were a lot of cars at the track that were using them. Great testimonial.
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      08-28-2007, 11:52 AM   #51
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can anyone tell me how much install was. I've always put sways on my bimmers (RDSport, Dinan, H&R..), but the install for the e92 seems like a PIA.

and as for the companies, i don't know that this applies to a totally new application and design, but my dinan adjustable sways were the best. They weren't huge, but the adjustability (much like the UUC's) was great for dialing out understeer. The RD sport ones were just too huge and they ripped out my brackets after a day at the track. They were just big for the sake of being the biggest i think, but i reinforced the brackets in the rear after that because they were a tad flimsy on the e46.
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      08-28-2007, 11:51 PM   #52
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Johnny3,

A Dinan shop charged me 360.00 for ft. and rr. They have to lower the whole rear sub frame, or something like that, to get the rr. in.

If you go with UUC I recommend having them recommend who should install the bars in your area. I didn't and I'm not happy at all with the Dinan folks in my area.
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      08-30-2007, 11:30 AM   #53
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Quote:
Originally Posted by cb650 View Post
Anyone have a suggestion on how to dial out the understeer? I have a 335i E92 with sports package and it understeers like a mofo on the track. I much prefer oversteer. As it is now, when you give it gas on a fast turn, the car just plows rather then turning in closer to the ideal line.
If you are looking for a more neutral stance, I would go with a rear sway bar upgrade. This will help dial out the stock understeer and provide a very stable setup for the car. You may in the future want to upgrade the front but the rear would provide the most improvement in the first place.
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      08-30-2007, 12:26 PM   #54
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Quote:
Originally Posted by cb650 View Post
Anyone have a suggestion on how to dial out the understeer? I have a 335i E92 with sports package and it understeers like a mofo on the track. I much prefer oversteer. As it is now, when you give it gas on a fast turn, the car just plows rather then turning in closer to the ideal line.
install a rear sway only. problem solved
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      08-31-2007, 11:29 AM   #55
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install a rear sway only. problem solved
While I agree that a stiffer rear sway will do wonders to tune out the understeer, a sway by itself is not a comprehensive solution, especially if your driving involves transitions, that is, back and forth, up and down stresses. If you drive on a perfectly level circular skid pad, the sway may suffice. But roads and most tracks require control of shifting forces, and for that upgrades to the compression/damping [shocks] and springs are helpful. An LSD will allow for more controlled application of power. Tire pressure is also a key component. And a weight loss diet.

Bottom line: get an E9x M3 CSL. If that is not an option, then get as many mods as you can afford that will emulate it.
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