11-09-2020, 11:33 PM | #157 |
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12-12-2020, 01:59 AM | #159 |
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Operator Mo64.50 |
12-12-2020, 05:47 AM | #161 |
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No full B12 kit.
Ride is good, very suited for fast and good roads. if your roads are shite, I wouldn't bother. Im actually in the process to fit M4 Comp springs to my Bilstein B8 dampers to see if I can rise the height a bit |
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12-12-2020, 09:53 AM | #162 |
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An Eibach Pro-Kit was installed which only includes lowering springs.
Car has adaptive suspension and while the for me it was a little too hard suspension, there is no rocking in corners and no lifting of the front of the car when accelerating. I do not mention the appropriate lowering that changes the car visually. I thought a long time before wearing it and delayed unnecessarily, I recommend it to anyone who has xDrive |
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12-17-2020, 05:20 AM | #163 | |
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12-17-2020, 09:25 AM | #164 |
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Don't forget a front strut bar and feedback re steering
I haven't pulled the plug on springs for my adaptive suspension 335 Xi bur am pondering it. I have non Run Flat tires of course. I just put on a front strut bar and it is a good ad. I would think useful for lowered cars also. On mine, which has the stock adaptive springs still, it gave a more solid feel on the highway, which is nice and also flattened the car and gave a bit more oversteer (or less understeer I should day) on cornering. Well worth the price. The steering remains the weak link.
How does the lowered car "feel" when the damn steering extra boost kicks in on hard lock? Charlie |
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12-17-2020, 11:35 AM | #165 | ||
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Koni Special Active struts/shocks Eibach springs, F0.8", R0.6" drop H&R Sway Bars Plus several other suspension modifications |
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12-17-2020, 12:04 PM | #166 | |
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I'm assuming F30. IMO you are over thinking the spring decision a bit. Eibach xDrive springs (with -06 in the part number) are a no brainer. They are about 10% stiffer so they will add a little more control without harshness and they should drop front ~0.8" and rear ~0.6" to rod of some BMW inherent xDrive reverse rake. If you are intent on going lower, some xDrive guys install the Eibachs meant for the RWD version of their car. Still a mild stiffness they drop lower. I can't recall exactly but roughly 1"-1.5" and should also get rid of some reverse rake. H&R also has some springs but I believe that they are at least 30% stiffer so maybe that's what you want if tracking but maybe not for daily driving. Your spring choice is not going to have a dramatic difference with your F3x steering. But I have a great solution. Replace your front thrust arms with these. It's an incredible difference. Steering becomes much more precise upon acceleration and upon braking without added Noise Vibration or Harshness. (NVH) You will feel a welcome addition of road feedback in the drivers hands at the steering wheel. No more numb steering feel! Installation is straight forward. Just make sure to remove the big bushing mounted toward the center of the car first and the ball joint near the wheel next. It's a straight control arm swap. No messing with pressing bushings in and out. And it's completely stock in dimensions so no radical changes to your stock alignment specifications. Although it's always smart to get an alignment done after changing suspension components. Also these work perfectly with xDrive. Other options aren't compatible with xDrive, they will actually break xDrive front driveshafts. There should be a Kies Motorsports YouTube channel video released in the next month or two. https://www.kiesmotorsports.com/coll...3603157?aff=22 Below is the part number to get if you have a F3x RWD car (since the stock xDrive and RWD thrust arms are slightly different) https://www.kiesmotorsports.com/coll...8819029?aff=22 Hope this helps! JohnU |
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12-23-2020, 05:58 PM | #168 | |
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2022 Porsche 911 Cabriolet Agate Grey/Black PDK 2019 440i M-Sport Smoke Topaz Metallic/Opel (Sold) 2014 335i M-Sport Black/Beige MPPK/MPE (Totaled) 2013 328i Sport xDrive Imperial Blue/Grey (Sold) |
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12-24-2020, 08:08 AM | #169 |
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I couldn’t find this info anywhere on this forum so wanted to post this.
After doing a lot of research between the 05/22 and 06/22 Eibach kit, it appears the only difference is the front springs. E10-20-031-05-22 kit spring part numbers - Front - F11-20-030-03-VA Rear - F11-20-031-03-HA E10-20-031-06-22 kit spring part numbers - Front - F11-20-031-06-VA Rear - F11-20-031-03-HA So it seems the difference between these 2 kits is wether or not you want a slightly lower front, which matches the rear; or the slightly higher front (some reverse rake). I personally have the 06/22 kit (most common in North America) and am wanting to swap the fronts to 05/22 (European version) as I don’t like the reverse rake. Last edited by spooned_n55; 12-24-2020 at 11:38 AM.. |
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12-25-2020, 06:28 AM | #170 | |
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If I recall correctly the "-05" part number wasn't a European version for the xDrive. It was the part number used on RWD models. Remember that the RWD initial setup is different so whatever drop is published for them, doesn't mean that those springs would provide the same drop on an xDrive. Note: The Eibach US website catalog is incomplete. I often go to the Eibach Germany website and choose for it to translate into English. It has a more complete list of what Eibach offers. Also I've discovered that Tunershop Germany website carries some part numbers not typically found in the US |
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12-25-2020, 07:55 AM | #171 | ||
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The Thrust Arm is made up of three components: the ball joint on one end (where it bolts onto the front wheel hub), the aluminum body of the arm (which is purposely designed of a shape and material for crash safety) and the bushing on the other end that is bolted to an attachment point towards the center of the car. That bushing is a giant piece of plastic with fluid filled chambers surrounded by an aluminum sleeve. BMW engineers designed this bushing to try to filter out Noise Vibration and Harshness from the road from being transmitted to the chassis. (I find that ironic because BMW caused a lot of that NVH by using runflat tires with their brutally stiff sidewalls.) One of the results was that the F3x steering feels incredibly numb and has too much play. People incorrectly assume that the poor steering play and feel are originating from the steering system itself. Not so! The steering system does have adjustability which you can feel change when shifting from Comfort to Sport Mode. But most of the poor steering feel originates in the huge amount of play that BMW engineers designed into that huge front bushing. Race suspension designers have known for decades that the way to get more control and precision is to ditch stock soft bushings with all of their play for harder polypropylene type bushings or even solid aluminum bushings. Solid bushings provide that needed race track control and precision but they have huge detrimental cost in massive amounts of NVH. They make your teeth rattle! Guys often assume that anything used on a race car will make their street car better. This another example where that isn't true! A more solid bushing reduces the excess play in the directions that cause steering to improve. But they reduce clearance in all directions which negates the original purpose of that big fluid filled bushing- to prevent NVH from being transmitted to the cabin occupants. Monoball bushing technology bridges that gap between the soft stock bushing and the more solid race bushing. The monoball reduces that excess clearance or play to dramatically improve steering. At the same time the monoball has freedom of movement in other directions to prevent NVH from being transmitted from the road to the chassis to the occupants. F3x Thrust Arms with monoball bushings make the steering much more precise under both acceleration and under braking. Guys who track their cars on weekends with stock front bushings describe a bit of terror when trying to hold a line at high speed near an outside wall. Several have said that they never felt comfortable in their steering to get closer than 3-4 feet from a wall despite their driving instructor telling them that they had to get closer to the wall to find the best line. Guys who have replaced their stock bushings with monoballs claim a much better weekend tracking experience. One guy said that his car now feels like he could hold a line just inches from the outer track wall. I noticed the same thing. It feels like if there was a stack of dimes on the lane line I could just nick them if I wanted to when changing lanes. There wasn't any additional NVH in the cabin. What is noticeable is that numb steering feel is gone. Now a nice bit of road feel is transmitted to the driver's hands through the steering wheel. Just as it should be. Remember that "monoball" is a design type. It is NOT some off the shelf commodity product. Every monoball is different and there are negatives to most of the products out there. Some are really designed for racing and aren't sealed properly. They could be quickly destroyed by the dirt and grime of being installed on a daily driver. Others aren't designed for the slightly different spec needed by xDrive cars. Others aren't really to exact stock mounting spec so they affect stock alignment settings. Others haven't been designed and built to exacting standards. The tolerances inside these bearings can be measured within a thousandth of an inch. But they all haven't been built that way. There is a difference. If you take them apart and measure their guts with engineering level calipers, it's obvious that some design engineers just said "that's good enough, no one will know the difference" and moved on to their next project. I did a lot of research. Below is a link to the monoball thrust arms that I installed on my F3x xDrive. They are the best that I have found. I'd expect that there will be a Kies video about them. https://www.kiesmotorsports.com/coll...3603157?aff=22 Below is the link to the F3x RWD Monoball Thrust Arms... https://www.kiesmotorsports.com/coll...8819029?aff=22 Hope this helps! |
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12-25-2020, 09:03 AM | #172 | |
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The E10-20-031-05-22 is listed as fitting the f3x xdrive as well, I think you may be confusing it with the 02-22 kit which is listed for RWD applications. Both 05/22 and 06/22 are listed for use on f3x xdrive. Difference (as far as I can see) is the front spring as well as the very slim availability of the 05/22 in North America. |
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12-25-2020, 09:48 AM | #173 | ||
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12-25-2020, 12:24 PM | #174 | |
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06-22 axel load rating - 1095kg (listed for use with xdrive) 05-22 axel load rating - 1065kg (listed for use with xdrive) 02-22 axel load rating - 1020kg (listed for use with RWD) 06-22 springs sit the highest, giving a reverse-rake look - 05-22 and 02-22 seem to sit around the about the same heights from what I can see after looking at MANY pictures. Seem to give a more level overall look. I have read a thread where someone stated the 05-22 front springs are VERY similar to the 06-22 spring in terms of characteristics, only it is slightly shorter which achieves the slightly more lowering. In terms of REAR springs - Both xDrive sets 06-22 and 05-22 appear identical, listing F11-20-031-03-HA as the part number with 1310kg axel load rating. The RWD 02-22 kit lists a different part number - F11-20-031-01-HA with a 1255kg axel load rating. I am not sure on the further differences of this part from the xDrive version. This is about all I could dig up - unless someone else has more info to share |
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12-25-2020, 02:07 PM | #175 | |
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I have tested both. -05 & -06 springs. My opinion I would not bother with -05 version as the car sits too low and it easily bottoms out. The springs just arent able for the weight of a 3.0 engine. I have swapped later on to -06 which are marginally better, the height is negligible, but they are tiny bit stiffer due to higher payload rating. Perfect for smooth roads, but on bumpy roads the springs will also fully compress. When I say compress, the coils actually touch each other on full stroke, which personally I think is unacceptable and Eibach clearly didnt do enough testing when it came choosing springs for Xdrive models. In the other hand, the springs 05 and 06 work perfectly fine on 2.0 engines which are a lot lighter and they give very good ride performance and stiffness. I also have BMW M4 CS springs to try out on my Xdrive, but to be honest they look almost identical to -06 Eibach, same size coils diameter and height. Im not sure about payload and rates. |
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12-25-2020, 04:00 PM | #176 | ||
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