|
|
07-10-2023, 12:10 PM | #24 | |
-Frank
478
Rep 682
Posts |
Quote:
Have you asked your mechanic his thoughts? Rubber wears, has more movement than solid bushings, and that would cause the squirmy feeling you may have. I noticed on track that my car has a similar feeling at higher speeds moving around track.. My whole rear subframe is OE so I suspect its the bushings also. I've been in a 1 series BMW that had bad subframe bushings and the car was all over the place. We did solid subframe bushings and the car felt 10x better. Its worth the few bucks to do it if you're not happy with how your car feels. -Frank
__________________
2005 M3 - SilverGrey/MT - SOLD
2013 E92 M3 ZCP AW/IR-BLK 2022 Ram 1500 Laramie Night Edition - leveled/34s IG: @_frank_stone_ |
|
Appreciate
0
|
07-10-2023, 01:05 PM | #25 | |
Second Lieutenant
241
Rep 222
Posts |
Quote:
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
|
Appreciate
0
|
07-10-2023, 09:50 PM | #27 |
Second Lieutenant
241
Rep 222
Posts |
Thanks for your input, never questioned it or expected anything, I was just looking to hear from other owners that have or have had similar experiences. My intention was not to question or doubt those that guve input. All I did was to quote what my mechanic stated.
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
Appreciate
0
|
01-07-2024, 05:34 AM | #29 |
Second Lieutenant
241
Rep 222
Posts |
Hi! No, not really. Had a 2nd alignment done, installed 15mm spacers all around and played with tire pressures and it somewhat improved.
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
Appreciate
0
|
01-07-2024, 10:00 PM | #30 | |
Major General
2161
Rep 5,547
Posts |
Quote:
If it’s not this and you’ve swapped dampers-springs then that pretty much leaves suspension arm bushings and subframe bushings. |
|
Appreciate
0
|
01-07-2024, 10:11 PM | #31 |
Lieutenant Colonel
1250
Rep 1,502
Posts |
I replied because I had this issue but you haven’t taken my advice, or others. Our cars work, yours doesn’t. Go figure!
Toe in rear Neutral front Correct tire pressures I don’t know how else to make this horse drink.
__________________
2011.5 E90 M3 DCT ZCP Slicktop
|
Appreciate
0
|
01-08-2024, 01:44 AM | #32 | |
Major General
2161
Rep 5,547
Posts |
Quote:
16 months and it’s not addressed?!?! I didn’t read through all posts. So rear is toed out? That’s going to make things a bit difficult unless you prefer oversteer all the time while cornering and applying power. Address the basic things first. |
|
Appreciate
0
|
01-08-2024, 10:11 AM | #33 |
Second Lieutenant
241
Rep 222
Posts |
Reason for slow progress on the car is because I only drive it 4 weeks per year as I live abroad and only go back home in the summer. Don’t want to spend all those precious 4 weeks chasing car issues 😂as I have other cars to enjoy. The Contis have done about 1250 miles. Attached is the last alignment done in July 2023. Sorry but the report is in Swedish but the rear values first and current values are on the far right on the report.
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
Appreciate
0
|
01-08-2024, 10:20 AM | #34 |
Dont listen to me
795
Rep 562
Posts |
Mr. C4 I'd be curious to see actual condition of your rear toe arm bushings. Under hard braking, all wheels naturally try to toe out, so maybe you could be experiencing a dynamic toe change that moves you toward zero or even positive toe out in the rear due to rear toe arm bushing deflection? The stock rear toe arms deflect quite a bit in both acceleration and braking changing toe value.
I know on my F82, the rear toe arms deflect enough under acceleration in a straight line to make the car squirm and make the rear end steer to the right. Adding aftermarket race toe arms with bearings and eccentric lockout plates really fixes the rear end both in acceleration and high speed braking. I need to do those arms to my e92 m3 now.
__________________
Instagram: @thatwhitem4
Last edited by MineralWhiteF80; 01-08-2024 at 10:39 AM.. |
Appreciate
1
Mr. C4241.00 |
01-08-2024, 11:28 AM | #35 | |
Second Lieutenant
241
Rep 222
Posts |
Quote:
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
|
Appreciate
0
|
01-08-2024, 12:24 PM | #36 | |
Dont listen to me
795
Rep 562
Posts |
Quote:
https://www.splparts.com/products/bm...c-lockout.html I like the SPL design because of the locking clamp/bolt design (like a steering rack tie rod end) versus many other manufacturer's standard 'jam/lock nut' that keeps the arm the same length. The SPL is much easier to adjust and maintain its length. Trying to tighten jam nuts tight enough without changing the toe setting is harder and can be frustrating since the toe adjustment is so delicate.
__________________
Instagram: @thatwhitem4
|
|
Appreciate
1
Mr. C4241.00 |
01-08-2024, 05:57 PM | #37 |
Brigadier General
3900
Rep 4,165
Posts |
Stock toe arms already use spherical bearings on both ends. So it's not the toe arms causing dynamic toe change. It's the rubber bushes in the other rear suspension locations - upper control arms, spring arm, etc that deflects under acceleration causing dynamic toe-out.
You can check out my rear spherical conversion thread here. And yes, removing all rear rubber bushings made a dramatic improvement to rear end stability and feel with minor sacrifice in NVH. https://www.m3post.com/forums/showthread.php?t=1781245 |
Appreciate
2
Mr. C4241.00 MineralWhiteF80794.50 |
01-09-2024, 07:29 AM | #38 | |
Dont listen to me
795
Rep 562
Posts |
Quote:
__________________
Instagram: @thatwhitem4
|
|
Appreciate
0
|
01-09-2024, 01:26 PM | #39 |
Major General
2161
Rep 5,547
Posts |
I decided to do a little research on toe in and whether it’s defined as positive or negative. I’ve always thought toe in was negative. However, toe in is not always defined as being negative. There are well known companies/websites and alignment machines that have toe in as being a positive measurement. So it’s possible Swedish alignment machines have toe in as a positive measurement and OP’s car has had rear toe in from the start. It makes no sense that toe in/out measurements are not universally negative/positive, they are usually negative/positive.
|
Appreciate
1
Mr. C4241.00 |
01-09-2024, 05:40 PM | #40 |
Brigadier General
3900
Rep 4,165
Posts |
Toe-in is universally positive toe. I have not heard of any system/machine where toe-in is negative toe. So I was quite confused when everyone was talking about OP having rear toe-out (-ve toe).
|
Appreciate
0
|
01-09-2024, 08:51 PM | #41 |
Major General
2161
Rep 5,547
Posts |
I thought the same thing. Just do a search for toe-in measured as negative or positive. I’d say my search results were 60/40 positive/negative. What I learned is it definitely is not universally measured/defined the same way.
|
Appreciate
1
Mr. C4241.00 |
01-12-2024, 12:42 PM | #42 |
Dont listen to me
795
Rep 562
Posts |
I get confused all the time regarding positive/negative value when doing my alignments that I have now resorted to just looking at the elementary level graphics on the alignment rack screen that shows arrows and the tire graphic moving inward or outward as I turn a bolt
__________________
Instagram: @thatwhitem4
|
Appreciate
0
|
01-12-2024, 01:34 PM | #43 | |
Second Lieutenant
241
Rep 222
Posts |
Quote:
__________________
2010 E90 M3
2013 F31 328i Touring M Performance |
|
Appreciate
0
|
01-14-2024, 07:23 AM | #44 |
Lieutenant
203
Rep 538
Posts |
Too much rear brake bias could cause this .
Change your rear brake pads to less aggressive compound . Last edited by atopa2002; 03-04-2024 at 09:47 PM.. |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|