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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > My upgrade path so far, Eibach Pro kit and Hankook V12 K110



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      09-17-2010, 02:17 PM   #1
jackb
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My upgrade path so far, Eibach Pro kit, Staggered 19 inch wheels on Hankook V12 K110

I though I would share my experiences so far with my 2008 Xi coupe,

First I come from a 2006 330i with ZSP suspension ( and 2003 before that with the same setup) and I loved the ride and handling of those cars , second this is my daily driver on which I put around 25K miles a year so comfort is important and last as a play toy I have a 2002 Miata that is set up for autoX with a fully adjustable suspension ( lots of fun). My wife also had a 2007 335xi but I never really drove it aggressively so I could not use it as a reference.

I first got the car mid July , it came with the sport pack 189 wheels and Bridgestone RE050 tires as I had sold this kit even prior to getting the car I did not really have time to assess it, but I was very surprised with how unglued the car felt when I took my first on ramp aggressively , I have to say I was very disappointed and could not wait to get the RFTs off and install other wheels

So first upgrade was to go on a square setup with General UHP 235/40/19 all around on VMR 715s 19X 8.5 I had these lying around as it was the one I had put on my wifeís car,
After I went for a drive to test them I came back home and apologized to her for having let her drive on these for 3 years , I was very surprised on how bad the car behaved with lots of body roll , unstable and twitchy and downright scary if you carried good speed in the curves . The reason I was so surprised is that I had the same tires on the 330i (235F and 275R) and while the car pushed a lot I loved them

VMR715




Second upgrade was a new set of wheels and Tire I went with Miro 313 reps with Hankook V12 K110 235/35/19F and 265/30/19 R
Wow talk about night and day difference I expected better but not such a drastic difference, car feels planted with a lot less understeer then my 330i had , confidence is back and I feel comfortable taking a curve at a good clip that I will be able handle it

Miro 942 with Hankook V12




Third upgrade was to install Eibach springs on the stock shocks , after much reading here on suspension upgrades and understanding my needs and requirements ( this is my DD remember) I decided on a 2 part upgrade which is try the springs first an see how I like them and if Iím not happy with them install then install Bilstein dampers. I understand that will be paying twice for install going that route but it took the shop 1h30 to install the springs which is only $125 worth it IMO They where installed yesterday and I have not driven much in them yet but I have to say I like them a lot, I was expecting a much harsher ride but its very close to what I had on the 330, you feel the bumps and road imperfections more but itís not harsh also it does not feel as if the car will break going across rail track, obviously I will drive more before making final judgment but so far so good

Dropped with Eibach Pro Spring

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      09-17-2010, 02:49 PM   #2
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Looks good, nice write up
Let us know how the springs handle a few weeks down the road as they settle more...wouldn't mind some more pics either
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      09-17-2010, 07:28 PM   #3
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Looks good, nice write up
Let us know how the springs handle a few weeks down the road as they settle more...wouldn't mind some more pics either
Thanks
and here are a few more shots , sorry about the quality, they're all a little overexposed as my camera was on the wrong mode and I did not notice













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      10-05-2010, 10:47 PM   #4
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Yes, keep us updated. I have a 2011 335i xdrive m-sport ordered that should arrive in November. I'm looking into suspension upgrades and really like what I'm hearing on the eibach springs. I'm curious at to how well these springs function with stock shocks and if you have any camber issues/odd tire wear using these springs with the stock shocks. I'm all for throwing better springs on to increase handling and reduce body roll and still maintain a comfortable ride. I'm not planning on tracking the car at all, just for having fun around town. Thanks...
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      10-18-2010, 07:14 PM   #5
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Looks good, I'm thinking about Bilsteins + eibach combo. Installation estimate I got was double what you paid so I just want to do it once.
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      10-18-2010, 11:12 PM   #6
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So I have been rolling on these for a month now and I have done a little over 3000Km (2K Miles), and I have to say I’m very impressed at the difference, the ride did firm up a little however it is still comfortable ,

Handling has improve significantly with less leaning and turn in is much crisper I have taken DTC off a few times now and pushed the car quite hard on some favorite back roads and it was very enjoyable

All in all I’m quite happy with the results so far, next change will in the spring where I will be looking at either going down to 18inch tires or replacing the dampers
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      10-19-2010, 06:43 AM   #7
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Nice thread here. Why are you either going back to the 18's or Bilsteins? Also did you measure the drop before/after on the springs? And did you get a new alignment after the spring install? Thanks.

Have a 335xi e92 as well and considering similar upgrade path. 19" wheels/tires, then ZSP springs, then Bilsteins + Eibach. Recently dumped the OEM RFT's for Conti's (AS) for winter use only, did not expect such a huge difference. That has me wondrnig how good this car could get with a little bit more aggressive but streetable suspension & tires.
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      10-19-2010, 12:53 PM   #8
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Nice thread here. Why are you either going back to the 18's or Bilsteins? Also did you measure the drop before/after on the springs? And did you get a new alignment after the spring install? Thanks.

Have a 335xi e92 as well and considering similar upgrade path. 19" wheels/tires, then ZSP springs, then Bilsteins + Eibach. Recently dumped the OEM RFT's for Conti's (AS) for winter use only, did not expect such a huge difference. That has me wondrnig how good this car could get with a little bit more aggressive but streetable suspension & tires.
I did not measure before only after , but visually you can see a big difference I would say between 1inch the back and 1 1/2 inches in front
I measured 14 in front and 13 1/2 in rear

I have been negligent on the alignment and I have not done it yet , the car does track straight tough at 70-75 and no weird tread wear
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      10-19-2010, 01:34 PM   #9
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I did not measure before only after , but visually you can see a big difference I would say between 1inch the back and 1 1/2 inches in front
I measured 14 in front and 13 1/2 in rear

I have been negligent on the alignment and I have not done it yet , the car does track straight tough at 70-75 and no weird tread wear
OK thanks. That drop is close to what's advertised on the Eibachs. I picked up a cheap set of used e92 335i ZSP springs but they will only do about half that drop, and the pics you have is about what I'd want. I may just skip the ZSP and go to Eibachs.
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      10-26-2010, 05:46 PM   #10
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more info im about to grab a 2008 e92 coupe xi and needs to be lower but need a nice ride will the bilstiens help keep ride really nice ?
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      10-29-2010, 12:41 PM   #11
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So for another update

I installed my winter tires last week 215/50/17s and it confirmed what I was suspecting , 19 inches wheels with little sidewalls and a drop is too harsh for Quebec roads , I also had the alignment done , the Eibach give only a subtle drop so alignment was not really off

Up until last year we also had a 335xi sedan which was riding on stock suspension and even with the winter wheels and tires (205/50/17s) when hitting a pothole you felt as if the car was going to break ,

My car does not feel like that anymore , the best way I can describe it is that the car is definitely firmer but it is more buttoned down and will take potholes and road imperfections much more comfortably , to put it simply I don’t cringe every time I see a small pothole like before I did before .

All in all I am very satisfied with the results , and I am very confident that next summer with the 18s it will be very satisfying

Here are a few pictures with the 17s







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      05-09-2011, 10:20 PM   #12
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I tough I was time to update this thread

Since installing the springs I did about 25 000Km and I can say that the ride is still as good as when I installed them and Iím very happy the results and I would recommend this upgrade to anybody

However I did receive a set of Bilstein sport shock as a gift so I had them installed today I, also had my 18" wheels installed a few weeks ago ,

first off the OEM springs where still in great condition and could have gone along for a long time still, I only having driven the car for about 200km today but I have to say though that if you have the budget go with this combo right away as it is much better (obviously new shocks help)the ride is a little stiffer then OEM but smoother at the same time it takes it up a notch and make my car feel the way I always wanted it,

This combined with the 18 tires and wheels make for the perfect combo for the XI IMO
Here are some pics







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      05-10-2011, 02:14 AM   #13
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eibach drop is very mild but im sure its also a very stiff ride no?
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      05-10-2011, 09:22 AM   #14
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eibach drop is very mild but im sure its also a very stiff ride no?
Brian,
The ride is stiffer yes but paradoxically is also much more comfortable , the difference in spring rate is not much but it makes for a better ride , with Bilstein and the non runflat tires the ride is perfect

you're from NYC so your roads are pretty bad but we from Mtl consider them an improvement over ours and I now I don't cringe as much when driving , finally I have compared back to back with my other XI and the difference is real not just seat of the pants
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      05-11-2011, 09:13 PM   #15
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how was the clearance/ride in the winter with the drop?
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      05-11-2011, 10:31 PM   #16
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how was the clearance/ride in the winter with the drop?
no issue , don't forget the car is really not that low. I find that it's about the same as my old E90 which was on sport suspension
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