BC Coils rides very bouncy

NitroBiz · 07-31-2022, 08:09 PM

I bought my e90 equipped with BC Coil-overs four years ago and the car rides really bouncy. Is there anything I can do to not make it not so bouncy other that adjusting the dampers which I've already got on the softest setting? Thank you in advanced!

amrazM · 08-01-2022, 07:25 PM

Quote:

Originally Posted by NitroBiz

I bought my e90 equipped with BC Coil-overs four years ago and the car rides really bouncy. Is there anything I can do to not make it not so bouncy other that adjusting the dampers which I've already got on the softest setting? Thank you in advanced!

You need better coilovers. There’s nothing that will make bc coilovers not ride like you’re on a flexible wood block.

Z K · 08-05-2022, 05:04 PM

BC are ok when new but wear out very fast. They will sell you replacement shocks but you'll just end up in the same place after some miles.

Get a better coilover.

omgzirra_exe · 08-06-2022, 03:23 AM

Quote:

Originally Posted by NitroBiz

I bought my e90 equipped with BC Coil-overs four years ago and the car rides really bouncy. Is there anything I can do to not make it not so bouncy other that adjusting the dampers which I've already got on the softest setting? Thank you in advanced!

4 years is a long time on coilovers lol.

just replace them.

even with the higher-end stuff, those require rebuilds maybe a little bit later depending on your usage.. the dedicated stuff requires it more frequently.

Fooksdaddy · 08-17-2022, 04:57 PM

Were they bought from fcpeuro??

Redd · 08-17-2022, 06:42 PM

If they're bouncy u need to increase damping, not decrease. If increasing damping doesn't work then your dampers are probably shot and need rebuilding/replacing.

patroklai · 08-17-2022, 08:39 PM

How much preload are you running? If you went too generous on the preload then no amount of dampening will reduce or eliminate the bounce.

DrFerry · 08-17-2022, 09:31 PM

Increase the rebound damping rate. Replace the existing springs with lower (softer) spring rates and/or increase the rebound damping rate (stiffer damping).

patroklai · 08-18-2022, 10:45 PM

Come to think of it, in 4 years your dampening is probably shot or near needing replacement. Bc sells their dampeners online for the cheap. If max stiff setting doesn't solve it, you may need new dampeners. I'd try resetting preload (try 5mm compression after the lock collars stabilize with the spring.

NitroBiz · 08-28-2022, 04:05 PM

Quote:

Originally Posted by Fooksdaddy

Were they bought from fcpeuro??

Quote:

Originally Posted by Fooksdaddy

Were they bought from fcpeuro??

I have no idea

07-31-2022, 08:09 PM	#1
NitroBiz First Lieutenant 148 Rep 384 Posts Drives: '11.5 e90 IB M3 Join Date: Mar 2018 Location: Seattle iTrader: (0)	BC Coils rides very bouncy I bought my e90 equipped with BC Coil-overs four years ago and the car rides really bouncy. Is there anything I can do to not make it not so bouncy other that adjusting the dampers which I've already got on the softest setting? Thank you in advanced!
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08-05-2022, 05:04 PM	#3
Z K Major General 1889 Rep 5,507 Posts Drives: E90 M3, G20 M340i Join Date: Jul 2011 Location: San Francisco iTrader: (3)	BC are ok when new but wear out very fast. They will sell you replacement shocks but you'll just end up in the same place after some miles. Get a better coilover. __________________ Auto Detailing Enthusiast!
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08-17-2022, 04:57 PM	#5
Fooksdaddy Second Lieutenant 109 Rep 256 Posts Drives: 2011 BMW M3 SSII Join Date: May 2016 Location: San Antonio iTrader: (3)	Were they bought from fcpeuro?? __________________ E90 ///M3 Silverstone II '11 (current) E90 ///M3 Silverstone II '08 E46 ///M3 Alpine White III E36 ///M3 Arctic Silver E46 ///M3 Carbon Schwartz
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08-17-2022, 06:42 PM	#6
Redd Brigadier General 3911 Rep 4,178 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	If they're bouncy u need to increase damping, not decrease. If increasing damping doesn't work then your dampers are probably shot and need rebuilding/replacing.
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08-17-2022, 08:39 PM	#7
patroklai Major 224 Rep 1,255 Posts Drives: Camaro SS \| e92 M3 Join Date: Jul 2011 Location: STL iTrader: (10)	How much preload are you running? If you went too generous on the preload then no amount of dampening will reduce or eliminate the bounce.
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08-17-2022, 09:31 PM	#8
DrFerry Field Marshal 6732 Rep 1,829 Posts Drives: '08 E92 M3 Join Date: Jul 2010 Location: Greenville, SC iTrader: (5) Garage List 2008 BMW M3 [5.25] 2015 BMW X5 [4.50]	Increase the rebound damping rate. Replace the existing springs with lower (softer) spring rates and/or increase the rebound damping rate (stiffer damping). __________________ '08 E92 M3 DCT Melbourne Red/Bamboo Beige Leather/EDC/SSP Spec-R DCT clutch discs/SSP Pro-Gold DCT Fluid/Quaife LSD/3:45 Final Drive by Diffs Online/BE Bearings & ARP Bolts/Vibra Technics Engine Mounts/M3 World HFC X-Pipe/LUX H8 180/BPM Sport DCT Tune/PFC Z-Rated Pads/ECS Brass Brake Caliper Bushings/Alex Shop Solid Sub-frame Bushings/Motul 600/Tint
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08-18-2022, 10:45 PM	#9
patroklai Major 224 Rep 1,255 Posts Drives: Camaro SS \| e92 M3 Join Date: Jul 2011 Location: STL iTrader: (10)	Come to think of it, in 4 years your dampening is probably shot or near needing replacement. Bc sells their dampeners online for the cheap. If max stiff setting doesn't solve it, you may need new dampeners. I'd try resetting preload (try 5mm compression after the lock collars stabilize with the spring.
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