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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Another BC Racing Coilover Review



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      04-24-2017, 03:56 PM   #23
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Originally Posted by bbnks2 View Post
4k/12k? really depends on your make an model as some weight more than others.
I have a bmw 328i sedan 2008. I was supposedly told that a good rate is 10k/16k. Im trying to go pretty low but not like touching the floor but pretty low. A good 2-3 inches.
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      04-24-2017, 04:02 PM   #24
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Originally Posted by Digitalize View Post
Depends on what sort of ride height and fitment you want too.
im definitely trying to drop about 2-3 inches so that I will be tucking on my stocks. I want to be able to sit flush on my set of wheels that are 19"
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      04-24-2017, 04:32 PM   #25
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Originally Posted by vincentvthaile View Post
I have a bmw 328i sedan 2008. I was supposedly told that a good rate is 10k/16k. Im trying to go pretty low but not like touching the floor but pretty low. A good 2-3 inches.
Can't help there. That's way beyond the point where it's functional. You might need 10k/16k to keep from bottoming out the struts, but it's going to ride like crap. 10k is ridiculously stiff.

Consult a "stance" pro.
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      04-24-2017, 06:19 PM   #26
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All depends on the level of comfort you want, but based on what I've seen recently where I recorded front/rear wheels over bumps you'll want to be close to 2x spring rate on rear to the front to keep the fitment even.

8k/16k would let you get pretty tight, but it's always a bit trial and error.
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      04-25-2017, 01:57 AM   #27
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If you're going for the slammed/stance look, you just have to throw ride comfort out the window. You can't have both.
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      04-25-2017, 03:04 AM   #28
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Originally Posted by VTECaddict View Post
If you're going for the slammed/stance look, you just have to throw ride comfort out the window. You can't have both.
True, do you happen to have any suggestions on what rates I should go?
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      04-25-2017, 03:05 AM   #29
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Quote:
Originally Posted by bbnks2 View Post
Can't help there. That's way beyond the point where it's functional. You might need 10k/16k to keep from bottoming out the struts, but it's going to ride like crap. 10k is ridiculously stiff.

Consult a "stance" pro.
Oh you make a good point, what rates do you think are good??
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      04-25-2017, 08:43 AM   #30
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Originally Posted by VTECaddict View Post
If you're going for the slammed/stance look, you just have to throw ride comfort out the window. You can't have both.
Not at all true. You can have a stiff suspension setup that still reacts correctly to bumps and road surfaces. Poorly spec'd spring/damper rates will be uncomfortable.

Plus it's all about getting the maximum amount of travel possible to run the softest setup you can get away with.
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      04-26-2017, 02:56 AM   #31
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Quote:
Originally Posted by vincentvthaile View Post
True, do you happen to have any suggestions on what rates I should go?
I have whatever the normal spring rates are on mine. Works fine.
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      04-26-2017, 03:53 PM   #32
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Quote:
Originally Posted by Digitalize View Post
Not at all true. You can have a stiff suspension setup that still reacts correctly to bumps and road surfaces. Poorly spec'd spring/damper rates will be uncomfortable.

Plus it's all about getting the maximum amount of travel possible to run the softest setup you can get away with.
oh thats good to hear! Can you happen to enlighten me on what rates you would suggest? I'd just like to know what you would think is a good set up
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      04-26-2017, 04:21 PM   #33
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Quote:
Originally Posted by vincentvthaile View Post
oh thats good to hear! Can you happen to enlighten me on what rates you would suggest? I'd just like to know what you would think is a good set up
Well I run 7/10k, but my fitment's not exactly what I'd call tight. It all depends what sort of look you want, what spec setup you'll be running, acceptable amounts of rubbing etc.

High spring rates will never be comfortable, but correctly matched and setup it shouldn't be crashy.
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      04-26-2017, 04:26 PM   #34
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Quote:
Originally Posted by Digitalize View Post
Well I run 7/10k, but my fitment's not exactly what I'd call tight. It all depends what sort of look you want, what spec setup you'll be running, acceptable amounts of rubbing etc.

High spring rates will never be comfortable, but correctly matched and setup it shouldn't be crashy.
Do you happen to have any photos you could post?? How does the ride feel for your set up? like is the front stiff enough where it doesnt bounce and same with the back? I was debating to go just the standard 8k/12k setup that comes with them.
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      04-26-2017, 05:52 PM   #35
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Photos in this thread, not the best fitment photos though.

http://www.e90post.com/forums/showthread.php?t=1377454

Fronts pretty good, ride is really nice, more comfortable than M Sport was when the dampers were set to full soft, on 1/3rd stiff now.

I've been considering changing to stiffer spring/dampers, I'd probably go for 8/14k, maybe 16k. I filmed my arch gaps on bumpy roads and the rear moves a lot more than the front.

Worst bit about the ride now is stretched tyres and stiff sidewalls, made a big difference from my previous setup.
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      04-27-2017, 04:18 PM   #36
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Quote:
Originally Posted by Digitalize View Post
I've been considering changing to stiffer spring/dampers, I'd probably go for 8/14k, maybe 16k. I filmed my arch gaps on bumpy roads and the rear moves a lot more than the front.
That's because 7k/10k is a completely imbalanced spring setup. You have a front wheel rate of roughly 366lb/in and a rear wheel rate of less than half that at 177lb/in. That's going to provide for a pretty poor handling and bouncy ride.
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      04-27-2017, 05:49 PM   #37
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Quote:
Originally Posted by bbnks2 View Post
That's because 7k/10k is a completely imbalanced spring setup. You have a front wheel rate of roughly 366lb/in and a rear wheel rate of less than half that at 177lb/in. That's going to provide for a pretty poor handling and bouncy ride.
Handles pretty nice considering all it does is motorways, really comfy actually but yeah ideally you'd have a different combo, it's just what the manufacturers recommended.

You're right though it doesn't handle amazingly on bumps midncorner but that doesn't bother me, it's a 160hp diesel ha.
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      12-25-2021, 04:57 PM   #38
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Just got a set of these installed, and the car feels tighter and more taut than on my old koni yellow setup. I have to agree on the bumps though, they’ll definitely rattle the car and are noticeable but car drives very smoothly on open highway.
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      03-21-2022, 11:43 AM   #39
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Originally Posted by thormessiah View Post
Just got a set of these installed, and the car feels tighter and more taut than on my old koni yellow setup. I have to agree on the bumps though, they’ll definitely rattle the car and are noticeable but car drives very smoothly on open highway.
What is your current dampening adjustment for front and rear? Any recommendations on settings?
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      03-21-2022, 11:25 PM   #40
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Quote:
Originally Posted by TitanLH8 View Post
Quote:
Originally Posted by thormessiah View Post
Just got a set of these installed, and the car feels tighter and more taut than on my old koni yellow setup. I have to agree on the bumps though, they’ll definitely rattle the car and are noticeable but car drives very smoothly on open highway.
What is your current dampening adjustment for front and rear? Any recommendations on settings?
I'm not sure what the exact specs are dude I had the people who installed it take care of that. The rears are fairly stiffer then the front's since I have 275 r888rs in the rear and rub
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      03-23-2022, 08:13 PM   #41
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Quote:
Originally Posted by TitanLH8 View Post
Quote:
Originally Posted by thormessiah View Post
Just got a set of these installed, and the car feels tighter and more taut than on my old koni yellow setup. I have to agree on the bumps though, they’ll definitely rattle the car and are noticeable but car drives very smoothly on open highway.
What is your current dampening adjustment for front and rear? Any recommendations on settings?
12-14 clicks from soft up front
8-10 clicks from soft in the rear

Decent place to start with and adjust to your liking from there. Hope that helps
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      03-25-2022, 10:41 PM   #42
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Great, thanks for the info!
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      10-18-2022, 11:10 AM   #43
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For the guys that went with the Swift springs, what rates did you end up going with? The stock springs the Coilovers can with are 8k/12k and the tide is bouncy and hard at high speeds. I'm trying to find an option that will dampen better for daily driving
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      10-18-2022, 11:44 AM   #44
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Quote:
Originally Posted by thormessiah View Post
For the guys that went with the Swift springs, what rates did you end up going with? The stock springs the Coilovers can with are 8k/12k and the tide is bouncy and hard at high speeds. I'm trying to find an option that will dampen better for daily driving
8k is really stiff up front and the front to rear ratio is too high which will cause it to pitch a lot.

6k/12k is a good balance as is 5k/15k
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