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2Addicts | BMW 2-Series forum Technical Topics Suspension | Chassis | Brakes F8x M3/M4 Front Lower Control Arm Upgrade for 2-Series

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      03-15-2020, 10:36 AM   #177
Pbdeed
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After checking the part numbers , I can confirm that left kunckle has the -30 min correction stock.

So what they did with the change of front spring strut and knuckle (swivel bearing) was correct like 21' degrees, and then an additional degree with the additional correction of the replaced knuckle (from -30 to +30), which resulted in overcorrection.

I guess I´ll ask to fit the neutral one, so my specs in the right front camber should be 1º 47' which is what in the range to achieve with the M4 LCAs + TS fitment (between 1º 30' and 2º).

I attach left (part number 6853651) and right side pictures (6853650)
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      06-17-2024, 10:52 AM   #178
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Quote:
Originally Posted by Bee Pee View Post
Summary of what these LCAs do

- added about 1 deg of neg camber
- moved the top of the wheel out a bit (reducing clearance to the bodywork)
- moved the wheel about 1/2" /13mm further forward in the wheel arch, adding some caster and more steering feel (and further reducing clearance to the wheel arch)

My car's other chassis mods means it doesn't suffer from understeer and already has crisp turn-in. My wider, more aggressive offset front wheels mean I'm on the limit as far as contact between tyre and wheel arch.

This OE upgrade (on a stock chassis or for someone considering an alternative to Sway bars) will:-
- be v effective in reducing understeer and making turn in sharper;
- negates the need for front spacers (front track is o/a 1"/25mm wider);
- reduce wear on outer shoulder PSS;
- adds more feel to EPS in both modes.

In summary, whilst I'm in a dilemma due to gains on my setup being marginal and high compression contact with my current wheels, this OE upgrade is very worthwhile.

Did you change just one just lower control arm or also upper ? because someone change one some bout..

thank you
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      06-17-2024, 12:40 PM   #179
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Quote:
Originally Posted by DailyDriveSebasite View Post
Did you change just one just lower control arm or also upper ? because someone change one some bout..

thank you
Hi - I initially installed F8x LCAs L&R and drove it for a while (as an early adopter I needed time to figure out what was required to ensure F8x TS/UCA would work).

Once ready, I added F8x TS/UCA L&R as well
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Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten:

Current '22 X3M LCI..
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