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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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      02-17-2015, 03:32 PM   #23
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LCA different on mx35i maybe due to these models having xenons as standard. Looking at GSR stock LCA photo in this thread, xenon equipped cars LCA are different as the LH LCA have small dimples to locate the headlight regulator rod.

The other lower wishbone part (tension strut) had same part number for all F2x and F3x.
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      02-18-2015, 01:05 AM   #24
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Those specific LCAs were developed for Mx35i and are only installed on those cars. BMW talk about that when M135i was launched.

There is no link to xenon autoleveling.

If you have xenon you have a small bracket fixed on LCA and LCA has two bumps to maintain it.

You are right that all other wishbone parts seem identical to other F2x/F3x.
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      02-18-2015, 02:55 PM   #25
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Given the road noise on mx35i compared to lesser f2x, LCA bushes maybe more solid on mx35i LCAs......

I believe the geometry ie LCA length is common between all f2x and F3x
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      02-23-2015, 05:46 PM   #26
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any word on the xenon connecting rod? can you use the stock ones, or do u need to purchase the f80 rods
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      02-23-2015, 06:28 PM   #27
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Best would be to carry out the same test on a M235i...
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      02-23-2015, 08:17 PM   #28
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Quote:
Originally Posted by quenotte View Post
Best would be to carry out the same test on a M235i...
These arms don't work on the M235i.

I would think the M3/4 rod would work, but I don't have xenons so can't confirm or deny.
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      02-23-2015, 09:34 PM   #29
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Quote:
Originally Posted by i8ur911 View Post
These arms don't work on the M235i.

I would think the M3/4 rod would work, but I don't have xenons so can't confirm or deny.
Why is it that they don't work on the M235?
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      02-24-2015, 12:48 PM   #30
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Ok, we finally received the tension struts from BMW last week. I have a completely stock 235i with xenons scheduled to come in at the end of this week to do a test fit with the F8x complete package with lower control arms, tension struts and the headlight leveling rod. I will post up with the findings asap.
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      02-24-2015, 12:51 PM   #31
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Quote:
Originally Posted by GSR Autosport View Post
Ok, we finally received the tension struts from BMW last week. I have a completely stock 235i with xenons scheduled to come in at the end of this week to do a test fit with the F8x complete package with lower control arms, tension struts and the headlight leveling rod. I will post up with the findings asap.


any chance you can test clearance on 17 inch wheel?
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      02-24-2015, 01:17 PM   #32
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Quote:
Originally Posted by GSR Autosport View Post
Ok, we finally received the tension struts from BMW last week. I have a completely stock 235i with xenons scheduled to come in at the end of this week to do a test fit with the F8x complete package with lower control arms, tension struts and the headlight leveling rod. I will post up with the findings asap.
Great. Look fwd to reading your review.
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      02-24-2015, 01:49 PM   #33
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Quote:
Originally Posted by Bee Pee View Post
Great. Look fwd to reading your review.
Looking forward to the results as well!!!!

-Nick
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      02-27-2015, 03:34 PM   #34
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Quote:
Originally Posted by GSR Autosport View Post
Ok, we finally received the tension struts from BMW last week. I have a completely stock 235i with xenons scheduled to come in at the end of this week to do a test fit with the F8x complete package with lower control arms, tension struts and the headlight leveling rod. I will post up with the findings asap.
Any update GSR?
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      03-03-2015, 08:15 PM   #35
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Quote:
Originally Posted by GSR Autosport View Post
Ok, we finally received the tension struts from BMW last week. I have a completely stock 235i with xenons scheduled to come in at the end of this week to do a test fit with the F8x complete package with lower control arms, tension struts and the headlight leveling rod. I will post up with the findings asap.
news?
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      03-04-2015, 08:51 PM   #36
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Quick update, the big news is the F22 and F8x tension struts are the same length, so no real reason to upgrade this other than the firmer bushing in the F8x part. If you do want to use the M4 parts, it will require spacers as the bushing is narrower than the stock F22 bushing. More to come on this.

The bad news is that for xenon cars, the F8x headlight level sensor rod is not even close to working, too short. We are looking into making a piece that will work with the F8x lower control arms.

Also, as i8ur911 found, camber is increased by 1 degree on an otherwise stock car.

We have been super busy here at the shop but I'll try to get the full writeup with pictures done this week.
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      03-05-2015, 11:41 AM   #37
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Quote:
Originally Posted by djpeetur View Post
any word on the xenon connecting rod? can you use the stock ones, or do u need to purchase the f80 rods
No issues whatsoever. We have done the R&D and the WB is a direct bolt-on with supplied parts kit.

http://f30.bimmerpost.com/forums/sho....php?t=1090804
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      03-05-2015, 12:03 PM   #38
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so what's the tension strut for? and do you need to replace both LCA and TS ?
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      03-05-2015, 02:47 PM   #39
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Pikcachu
I will be replacing just LCA only.
BP
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      03-05-2015, 06:09 PM   #40
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Quote:
Originally Posted by Bee Pee View Post
Pikcachu
I will be replacing just LCA only.
BP
let me know how it goes.... i suppose stock is the same as the M235?
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      03-06-2015, 03:31 AM   #41
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Quote:
Originally Posted by pikcachu View Post
let me know how it goes.... i suppose stock is the same as the M235?
Pikcachu,

Will do.

TS - same length as stock M235i but bushing is stiffer
LCA - about 10mm longer than stock M235i with stiffer bushing and a different connection to xenon levelling rod on LHS LCA.

BP
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      03-06-2015, 03:53 PM   #42
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Quote:
Originally Posted by GSR Autosport View Post
The bad news is that for xenon cars, the F8x headlight level sensor rod is not even close to working, too short. We are looking into making a piece that will work with the F8x lower control arms.
I have an F30 335i with xenons... If I upgrade to F8x wishbones only (not tension struts), will I still need the ball links from the F8x headlight self-level sensor regulator rods kit? (p/n: 37 14 2 283 867)
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      03-12-2015, 07:47 PM   #43
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DVC,
Yes that seems to be the easiest way to get the required ball studs as they are included with the M3/M4 regulating rod. As the HP Autosport guys pointed out, that way you can use the stock F3x plastic rod and attach it to the M3/M4 control arm which appears to be close enough in length that it should work fine.
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      03-13-2015, 04:01 PM   #44
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The M235i has got LCA of the same length as the other F2x and F3x vehicles, right? Only with slightly stiffer bushings, which are still not as stiff as the M3/M4 LCA Bushings?

Are there more geometrical suspension differences between the normal F3x and M3/M4 apart from different material and bushing choices?

Thanks
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