Autotalent
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Technical Topics > Suspension | Brakes | Chassis

Post Reply
 
Thread Tools Search this Thread
      01-15-2020, 03:57 AM   #23
Bee Pee
Brigadier General
United Kingdom
1215
Rep
3,908
Posts

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

iTrader: (3)

OP,

Try the cheap stuff 1st - get yr car 4 wheel aligned and ask then to reduce rear camber down to -1.5deg both sides.

Its a revelation as far as traction w/o sacrificing grip in the bends...

BP
__________________
Fettled M135i EB AT - gone but not forgotten:
AW M2 DCT
Appreciate 0
      01-15-2020, 04:37 PM   #24
M 4 FUN
Private First Class
133
Rep
185
Posts

Drives: BMW 320, BMW M4 competiti
Join Date: Aug 2016
Location: Sweden

iTrader: (0)

Quote:
Originally Posted by Bee Pee View Post
OP,

Try the cheap stuff 1st - get yr car 4 wheel aligned and ask then to reduce rear camber down to -1.5deg both sides.

Its a revelation as far as traction w/o sacrificing grip in the bends...

BP
I run only 1,2 degrees rear camber.
Appreciate 1
Bee Pee1214.50

      01-17-2020, 07:01 PM   #25
Taco_Bueno
Private First Class
United_States
53
Rep
120
Posts

Drives: BMW M4 F82
Join Date: Mar 2019
Location: Lubbock, TX

iTrader: (0)

Have you tried a trunk lip spoiler? :
Appreciate 0
      01-18-2020, 03:14 PM   #26
Luckylou22123
New Member
2
Rep
12
Posts

Drives: 2014 Porsche 991
Join Date: Oct 2019
Location: De Soto, KS

iTrader: (0)

Quote:
Originally Posted by Bee Pee View Post
OP,

Try the cheap stuff 1st - get yr car 4 wheel aligned and ask then to reduce rear camber down to -1.5deg both sides.

Its a revelation as far as traction w/o sacrificing grip in the bends...

BP
That was the first thing I did and it does work, but there is still a lot of room for improvement!
Appreciate 0
      01-18-2020, 03:23 PM   #27
Luckylou22123
New Member
2
Rep
12
Posts

Drives: 2014 Porsche 991
Join Date: Oct 2019
Location: De Soto, KS

iTrader: (0)

Just an update for you guys! Thank you so much for all the input. I have since done a ton of research and found some interesting stuff regarding my problem.

First of all, Iím running the BM3 CS+ map because I want to utilize the flat torque curve it offers. After digging around I found that the map has an issue that multiple people are reporting where you get a throttle spike for a split second. This is what caused me to look into improving my rear traction, because that rear spike broke my traction mid corner and caused me to spin out. Anyway now that I know that is the cause I have reverted to a different map and it has gone away.

Secondly, Iím still new to the car and learn new things the more I drive it. I figured out that the stock passive suspension I have is not tuned correctly, because the car bounces and shifts on the road due to how the rebound and dampening is set up. I will be upgrading the suspension to Ohlin R&T going forward. That should be a good step in the direction Iím looking at to gain the confidence Iím looking for.

Lastly, I will upgrade the differential bushing to a powerflex version and also change the tire width on the rear. Most likely I will get a better wheel set up for track purposes.

Thanks a ton guys!!!
Appreciate 0
      01-22-2020, 04:17 AM   #28
M 4 FUN
Private First Class
133
Rep
185
Posts

Drives: BMW 320, BMW M4 competiti
Join Date: Aug 2016
Location: Sweden

iTrader: (0)

I have just installed the ÷hlins road&track kit. I am not satisfyed. it's way too stiff. The springrates are way too high for me and Comfort is really bad when the suspension compresses over anything than small imperfections. i have a discussion about this with Ųhlins now so we will see what happens. I gave them a lot of "inputs" about this kit that were not good with the instructions in the manual too.
Appreciate 0
      01-22-2020, 09:35 PM   #29
Luckylou22123
New Member
2
Rep
12
Posts

Drives: 2014 Porsche 991
Join Date: Oct 2019
Location: De Soto, KS

iTrader: (0)

Quote:
Originally Posted by M 4 FUN View Post
I have just installed the ÷hlins road&track kit. I am not satisfyed. it's way too stiff. The springrates are way too high for me and Comfort is really bad when the suspension compresses over anything than small imperfections. i have a discussion about this with Ųhlins now so we will see what happens. I gave them a lot of "inputs" about this kit that were not good with the instructions in the manual too.
I have heard about their stiffness before. Iím actually looking into the Ohlinís sold by 3DM which is tuned more for street instead of track
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 03:43 PM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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