Bimmerpost
3
/
4 Series
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Technical Topics Suspension / Chassis / Brakes KC Design Bracing Review

Post Reply
 
Thread Tools Search this Thread
      11-29-2023, 12:58 PM   #23
Darren Lewis
Enlisted Member
Darren Lewis's Avatar
33
Rep
46
Posts

Drives: 2020 M340ix
Join Date: Feb 2023
Location: Columbus, OH

iTrader: (0)

Garage List
2020 M340i  [0.00]
Saw this the other day, its for an F30, but probably a very similar process.

https://www.youtube.com/watch?v=eP9Jyr2v93s
Appreciate 1
noname45.00
      11-30-2023, 05:29 PM   #24
noname
Canyon Seeker
noname's Avatar
United_States
45
Rep
153
Posts

Drives: 2021 M340i
Join Date: Feb 2023
Location: LA

iTrader: (0)

Quote:
Originally Posted by Darren Lewis View Post
Saw this the other day, its for an F30, but probably a very similar process.

https://www.youtube.com/watch?v=eP9Jyr2v93s
Thanks man. This was the post I saw before - https://g20.bimmerpost.com/forums/sh....php?t=1771257
Appreciate 1
      07-24-2024, 10:25 PM   #25
alep85
First Lieutenant
195
Rep
320
Posts

Drives: 2011 335i, 2023 M340i xDrive
Join Date: Oct 2011
Location: United States

iTrader: (1)

Just bought the KC Designs strut member bar from Kies. Huge fan thus far, I feel like it does stiffen up the front end on turn in and gives less dive, more like my E90 335i felt.
Appreciate 2
jpowers36259.50
MoeTE871041.50
      07-25-2024, 02:10 AM   #26
jpowers36
Lieutenant
jpowers36's Avatar
United_States
260
Rep
471
Posts

Drives: 2020 BMW M340i xDrive
Join Date: May 2021
Location: TN

iTrader: (0)

I’m having the the front and rear under braces installed soon. I’ll report back.
__________________
2020 M340i xDrive - Mineral Grey Metallic/Cognac - MG Flasher Stage 2 OTS 93 | XHP Stage 3 | AA DP | Valvemaster | MST
IG: jpowers36
Appreciate 1
MoeTE871041.50
      07-29-2024, 12:11 AM   #27
Gryph8n
Second Lieutenant
Gryph8n's Avatar
United_States
142
Rep
244
Posts

Drives: M440i, X5, MDX, Tacoma
Join Date: Oct 2023
Location: Northwestern USA

iTrader: (0)

Garage List
Anyone can comment about thicker sway bars vs bracing for body roll and chassis stiffness on track? For example, did bracing and wasn’t happy until after upgraded sway bars, etc.
Appreciate 0
      07-29-2024, 12:47 AM   #28
jpowers36
Lieutenant
jpowers36's Avatar
United_States
260
Rep
471
Posts

Drives: 2020 BMW M340i xDrive
Join Date: May 2021
Location: TN

iTrader: (0)

Sway bars will help out the most but they are not cheap to have installed. Something like 20 hours of labor. I was going to do them until I found that out. I’ll get Ohlin coilovers before I do sways. I did them on my G37 and they made a big difference. I’m not expecting that much of a difference when I get the under chassis braces installed. Getting that and CF aero installed all around on Wednesday.
__________________
2020 M340i xDrive - Mineral Grey Metallic/Cognac - MG Flasher Stage 2 OTS 93 | XHP Stage 3 | AA DP | Valvemaster | MST
IG: jpowers36
Appreciate 2
MoeTE871041.50
Gryph8n142.00
      07-30-2024, 08:48 PM   #29
RCKYMTN M34OI
Private
43
Rep
95
Posts

Drives: 2020 M340i
Join Date: Nov 2022
Location: Denver,co

iTrader: (0)

Quote:
Originally Posted by Gryph8n View Post
Anyone can comment about thicker sway bars vs bracing for body roll and chassis stiffness on track? For example, did bracing and wasn’t happy until after upgraded sway bars, etc.
I have the front+rear lower subframe braces as well as the mid brace. Not drastic but it definitely makes a difference. Reduces body roll a bit and keeps the steering feeling crisp and tight. Overall I feel it was worth it. Especially being that you can get free shipping through Kies.
Sway bars will make a much bigger difference . . . I may tackle that in the next few months.
Appreciate 2
Gryph8n142.00
jpowers36259.50
      07-31-2024, 05:54 PM   #30
jpowers36
Lieutenant
jpowers36's Avatar
United_States
260
Rep
471
Posts

Drives: 2020 BMW M340i xDrive
Join Date: May 2021
Location: TN

iTrader: (0)

Got front and rear underneath braces installed. The muffler on my Valvemaster exhaust had to come out to install it but good news is that it fit. I’ll chime back in once I’ve put more miles on it to see if any difference is noticed.
__________________
2020 M340i xDrive - Mineral Grey Metallic/Cognac - MG Flasher Stage 2 OTS 93 | XHP Stage 3 | AA DP | Valvemaster | MST
IG: jpowers36
Appreciate 0
      08-10-2024, 11:33 PM   #31
jpowers36
Lieutenant
jpowers36's Avatar
United_States
260
Rep
471
Posts

Drives: 2020 BMW M340i xDrive
Join Date: May 2021
Location: TN

iTrader: (0)

Update: Car does feels a bit tighter but I don’t drive it too hard. Did a pretty hard lane change today and it felt solid.

However…..I’ve noticed increased NVH from the front. Upon inspection, the front under brace appears to be almost or barely touching my AA downpipe. So I think with slight flexing of the DP it causes it to hit the brace and I can feel/hear it. First noticed it when turning and then started to notice it on hard acceleration pulls.

If I can’t get it adjusted to not hit it, I’m taking it off and will be selling it. Maybe it’s better suited for OEM downpipe.

I’ll update again once I take it back to the shop.
__________________
2020 M340i xDrive - Mineral Grey Metallic/Cognac - MG Flasher Stage 2 OTS 93 | XHP Stage 3 | AA DP | Valvemaster | MST
IG: jpowers36
Appreciate 2
peelerec1329.00
      08-12-2024, 03:19 PM   #32
Bee Pee
Brigadier General
Bee Pee's Avatar
United Kingdom
1922
Rep
4,605
Posts

Drives: AW M2 DCT
Join Date: Jun 2010
Location: SW London

iTrader: (3)

Quote:
Originally Posted by jpowers36 View Post
Hey guys sorry for the delay. I got the rear strut bar installed. It was fairly easy, although I did accidentally strip one of the bolts. I may eventually replace them with hex bolts instead of the torx ones so I can tighten it down further. I’ve driven with it on for a couple months now. I haven’t noticed any real difference on my daily trips with just this one installed. I wasn’t expecting to feel a noticeable difference. I plan on installing the rest here soon when my schedule allows for it. The bar does look cool when you open the trunk. But if you are packing the trunk full for a trip, luggage will hit it. Not a huge deal but just be careful so the finish isn’t dinged up. I didn’t realize until after I installed it that the hooks can be installed with it.
I’m struggling to comprehend how a brace bolted in the trunk between 2 lashing points, remote from rear subframe mounts can provide any tangible benefits.
__________________
Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten:

Current '22 X3M LCI..
Appreciate 0
      09-23-2024, 07:03 AM   #33
thaRizzler
Enlisted Member
thaRizzler's Avatar
20
Rep
48
Posts

Drives: 2021 M340i
Join Date: Jul 2024
Location: Virginia

iTrader: (0)

Quote:
Originally Posted by jpowers36 View Post
Update: Car does feels a bit tighter but I don’t drive it too hard. Did a pretty hard lane change today and it felt solid.

However…..I’ve noticed increased NVH from the front. Upon inspection, the front under brace appears to be almost or barely touching my AA downpipe. So I think with slight flexing of the DP it causes it to hit the brace and I can feel/hear it. First noticed it when turning and then started to notice it on hard acceleration pulls.

If I can’t get it adjusted to not hit it, I’m taking it off and will be selling it. Maybe it’s better suited for OEM downpipe.

I’ll update again once I take it back to the shop.
Hey man, I'm super close to pulling the trigger on the KC strut and front member braces. You liking them so far? Really looking to tighten up the feel of the G20. I know the RFTs I still have on the care certainly aren't helping, but I'm honestly shocked at how much more planted my 16 Lexus IS300 felt through tighter curves/on-ramps etc.
Appreciate 0
      Yesterday, 11:35 PM   #34
peelerec
Major
peelerec's Avatar
1329
Rep
1,441
Posts

Drives: 2022 M340i Mineral Grey
Join Date: Nov 2021
Location: North Bay & Los Angeles

iTrader: (0)

Garage List
2022 BMW M340i  [9.90]
Quote:
Originally Posted by thaRizzler View Post
Hey man, I'm super close to pulling the trigger on the KC strut and front member braces. You liking them so far? Really looking to tighten up the feel of the G20. I know the RFTs I still have on the care certainly aren't helping, but I'm honestly shocked at how much more planted my 16 Lexus IS300 felt through tighter curves/on-ramps etc.
I would choose tires first, over any suspension. I would then consider sway bars or coilovers.
__________________
Present: 2022 M340i Mineral Grey
Past: 2019 330i, 2012 Evo X GSR
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:57 PM.




g20
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST