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Suspension & Braking Forum by BimmerWorld
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Old 05-12-2016, 09:44 PM   #1
E46Architect
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Switch from Bilstein PSS coilovers to Koni FSD/Eibach Sportlines

I wonder if anyone has experience going from coilovers to springs/shocks?
My car is nearing end-of-life on its second set of Bilstein PSS coilovers. The first set was installed in 2008 and the second in 2012. The fronts are starting to leak now.

I am starting to wonder whether I should get another set of PSS's to replace them or to change strategies and get Koni FSD 2100 shocks & Eibach Sportline springs.
I love how the Bilsteins handle on the highway and in the mountains but am a little tired of the bouncing around when driving on uneven city streets.

Does anyone have experience with a switch like this? Specifically I would like to know how the Koni/Eibach setup would compare with what I am used to, both at speed, in the twisties and around town.

Thank you

Last edited by E46Architect; 05-12-2016 at 09:52 PM.
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Old 05-13-2016, 03:24 AM   #2
sprintman
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Quote:
Originally Posted by E46Architect View Post
I wonder if anyone has experience going from coilovers to springs/shocks?
My car is nearing end-of-life on its second set of Bilstein PSS coilovers. The first set was installed in 2008 and the second in 2012. The fronts are starting to leak now.

I am starting to wonder whether I should get another set of PSS's to replace them or to change strategies and get Koni FSD 2100 shocks & Eibach Sportline springs.
I love how the Bilsteins handle on the highway and in the mountains but am a little tired of the bouncing around when driving on uneven city streets.

Does anyone have experience with a switch like this? Specifically I would like to know how the Koni/Eibach setup would compare with what I am used to, both at speed, in the twisties and around town.

Thank you
FSD can handle a max drop of 25mm or they don't work correctly. Eibach Pro-kit are the correct springs, Sportline have to much drop.
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Old 05-13-2016, 03:49 AM   #3
E46Architect
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Interesting. It seems that Bavarian Auto sells them as a kit (item 2150 4006). Are the springs in that kit pro-kit?
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Old 05-13-2016, 08:57 AM   #4
zander271
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Quote:
Originally Posted by E46Architect View Post
Interesting. It seems that Bavarian Auto sells them as a kit (item 2150 4006). Are the springs in that kit pro-kit?

Yes they are the pro kit.
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ZHP Mods: JB Lightweight fly wheel (10.5 pounds), Koni FSD ProKit, Supreme Power Drop Hats, Hotchkis front(30.2mm)/rear(25.4mm) sway bars, Sprint Booster, AFE Stage 1 Intake, Morimoto EvoX-R Headlights, Orion V4 Angel Eyes, Satin Black 18x9 ET42 APEX ARC-8 Wheel

330xi Mods:Front Koni Yellow Struts and Rob43 Rear 9 Way adjustable Rear Dampers,H&R Sport Springs,Supreme Power Drop Hats,ZHP 5 speed shift knob
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Old 05-13-2016, 08:58 AM   #5
sprintman
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Quote:
Originally Posted by E46Architect View Post
Interesting. It seems that Bavarian Auto sells them as a kit (item 2150 4006). Are the springs in that kit pro-kit?
No idea but using springs too short is a common mistake with FSD. 24mn max drop, less even better. Best combo available for a DD, comfort and handling. Not a racetrack combo though...
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Old 05-13-2016, 09:30 AM   #6
E46Architect
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Switch from Bilstein PSS coilovers to Koni FSD/Eibach Sportlines

I like the idea of a 'softer' ride when driving on uneven city/downtown streets. However I would like to retain the excellent handling at speed... Especially on twisty mountain roads. How would the FSD/Pro kit combination compare to what I'm used to when driving out there?

By the way I also have upgraded Hotchkis sway bars and an Active Autowerke upper strut brace. All bushings are always kept fresh.
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Last edited by E46Architect; 05-13-2016 at 09:30 AM.
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Old 05-13-2016, 12:06 PM   #7
Alex323Ci
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your Bilsteins PSS have a lifetime warranty.

if youre going to switch I think the Koni Sport Adjustables and H&R springs would be an option for you.
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OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF
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Old 05-13-2016, 12:07 PM   #8
zander271
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I have the FSD pro Kit on my ZHP with Hotchkis sway bars and handles great in the turns and at speed. You can look at my signature for the mods on my cars.

OP what springs do you have now? Also if your roads are crap the Eibach Sportline(Use with Koni Yellows) and Pro Kit springs are less harsh.
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ZHP Mods: JB Lightweight fly wheel (10.5 pounds), Koni FSD ProKit, Supreme Power Drop Hats, Hotchkis front(30.2mm)/rear(25.4mm) sway bars, Sprint Booster, AFE Stage 1 Intake, Morimoto EvoX-R Headlights, Orion V4 Angel Eyes, Satin Black 18x9 ET42 APEX ARC-8 Wheel

330xi Mods:Front Koni Yellow Struts and Rob43 Rear 9 Way adjustable Rear Dampers,H&R Sport Springs,Supreme Power Drop Hats,ZHP 5 speed shift knob

Last edited by zander271; 05-13-2016 at 12:11 PM.
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Old 05-13-2016, 12:42 PM   #9
E46Architect
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I have been running on Bilstein PSS Coilovers for a decade now. Considering a slightly less harsh ride now
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Old 05-14-2016, 10:04 AM   #10
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My sisters E46 which I have driven quite a bit has Bilstein PSS, I have koni sports/eibach pro kit. The konis/eibach are a bit softer/more practical imo for DD use, but the bilsteins feel pretty damn great in the corners. Even when I up the dampening on the konis it doesn't match the bilstein ride for cornering. The bilsteins are just significantly stiffer
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2003 330i ZHP 6MT
Performance: Koni Sport Struts/Shocks, Eibach Pro-Kit, 17x9 Apex ARC-8, TMS F&R Sway bars, M3 RTABs w/ Vorshlag Limiters, M3 Strut Brace

Aesthetics/Functionality: TFX Projector retrofit by lightwerkz, 20% Tint, OEM Aux Input, Clear corners, LED taillights, M3 Steering wheel, Black kidney grills, mobius dash cam

Last edited by bimmernate; 05-14-2016 at 10:05 AM.
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Old 05-14-2016, 04:25 PM   #11
zander271
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My Ride: 6spd ZHP/5sp XI
Switch from Bilstein PSS coilovers to Koni FSD/Eibach Sportlines

Quote:
Originally Posted by bimmernate View Post
My sisters E46 which I have driven quite a bit has Bilstein PSS, I have koni sports/eibach pro kit. The konis/eibach are a bit softer/more practical imo for DD use, but the bilsteins feel pretty damn great in the corners. Even when I up the dampening on the konis it doesn't match the bilstein ride for cornering. The bilsteins are just significantly stiffer

Does she have the same springs?
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ZHP Mods: JB Lightweight fly wheel (10.5 pounds), Koni FSD ProKit, Supreme Power Drop Hats, Hotchkis front(30.2mm)/rear(25.4mm) sway bars, Sprint Booster, AFE Stage 1 Intake, Morimoto EvoX-R Headlights, Orion V4 Angel Eyes, Satin Black 18x9 ET42 APEX ARC-8 Wheel

330xi Mods:Front Koni Yellow Struts and Rob43 Rear 9 Way adjustable Rear Dampers,H&R Sport Springs,Supreme Power Drop Hats,ZHP 5 speed shift knob

Last edited by zander271; 05-14-2016 at 04:25 PM.
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Old 05-14-2016, 08:43 PM   #12
Alex323Ci
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well the FSD should be a more compliant ride than the Bilsteins you have. and generally in the kits the Eibachs are a softer spring than the H&R (although that can vary on Progressive vs Linear and spring rates).
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OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF
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Old 05-15-2016, 09:39 AM   #13
BE46N
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My Ride: E46 M Sport Coupe
I have eibach sport lines on standard M-sport (zhp?) shocks with no issues. Best of both worlds, sits nice and low and ride is very compliant. I believe the eibach pro springs don't give any drop over the standard springs on my car. E46 M-Sport coupe.
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