F8x M3/M4 Front Lower Control Arm Upgrade for 2-Series

pikcachu · 07-16-2015, 01:38 PM

Quote:

Originally Posted by SteveInfante

Pikachu did you ever see if this mod would work with the stock 17" wheels that I have? I know they work with the Kosei's that you have but if I don't have to buy wheels then that would be awesome.

No idea... I have 18" stock...

I would get the LCA and return it if it doesn't fit or get wheels that fit

SteveInfante · 07-16-2015, 01:40 PM

I may try this when I get around to it. I just dropped my car off to ship to South Carolina this afternoon. I'm plotting arrival gifts. LOL.

Pparana · 08-08-2015, 12:01 PM

Quote:

Originally Posted by GSR Autosport

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.

Did the tension struts ever fit? If so how much spacer was needed? I want to get rid of some of the deflection under braking with race pads and think these may help, plus there is a monoball kit for these.

G4Z808 · 10-08-2015, 09:23 PM

I see gsr only has one listing for the lca on their site and it didn't come with the leveling rods. where are everybody getting their leveling rods

rwalker · 10-09-2015, 08:59 AM

Quote:

Originally Posted by G4Z808

I see gsr only has one listing for the lca on their site and it didn't come with the leveling rods. where are everybody getting their leveling rods

people are just using the stock rod attached to a ball on screwed into the M3 LCA

Beartato · 01-04-2017, 04:17 PM

Thread's kind of old, but I just had a question. Forgive my ignorance, but would this mod change the wheel/strut clearance? From reading the thread it seems to, just double checking to make sure I'm understanding this right. For reference my summer wheels are 18x8.5 with an offset of 40. I don't run spacers and I've got maybe 1 cm of clearance between the wheel and strut.

rwalker · 01-04-2017, 04:27 PM

Quote:

Originally Posted by Beartato

Thread's kind of old, but I just had a question. Forgive my ignorance, but would this mod change the wheel/strut clearance? From reading the thread it seems to, just double checking to make sure I'm understanding this right. For reference my summer wheels are 18x8.5 with an offset of 40. I don't run spacers and I've got maybe 1 cm of clearance between the wheel and strut.

There's no change to wheel->strut clearance, which is dictated by knuckle shape, hub offset, rotor hat thickness, and wheel offset, none of which change when doing LCAs or TSes.

Beartato · 01-04-2017, 04:40 PM

Quote:

Originally Posted by rwalker

There's no change to wheel->strut clearance, which is dictated by knuckle shape, hub offset, rotor hat thickness, and wheel offset, none of which change when doing LCAs or TSes.

Oh sick, that's good to know.

Turner Motorsport sells a kit. Seems like a good deal to me.

https://www.turnermotorsport.com/p-3...-arms/?pdk=AQE

rwalker · 01-04-2017, 04:44 PM

Quote:

Originally Posted by Beartato

Oh sick, that's good to know.

Turner Motorsport sells a kit. Seems like a good deal to me.

https://www.turnermotorsport.com/p-3...-arms/?pdk=AQE

Good price. I recommend doing the TSs at the same time.

Beartato · 01-04-2017, 04:49 PM

Quote:

Originally Posted by rwalker

Good price. I recommend doing the TSs at the same time.

Do you have the part numbers/a link for those? Seems like a good thing to do.

rwalker · 01-04-2017, 04:54 PM

info in this thread: http://www.2addicts.com/forums/showthread.php?t=1250352
this post: http://www.2addicts.com/forums/showp...1&postcount=41

Beartato · 01-04-2017, 05:02 PM

Quote:

Originally Posted by rwalker

info in this thread: http://www.2addicts.com/forums/showthread.php?t=1250352
this post: http://www.2addicts.com/forums/showp...1&postcount=41

Sweet info, thank you.

CFF · 01-05-2017, 09:11 PM

Hi all, I am currently located in Taiwan, I have a F22 220D wondering if M3 LCAs are in fact direct bolt on, thanx!!!

CFF · 01-07-2017, 08:53 AM

No one??

rwalker · 01-07-2017, 09:27 AM

according to realoem, the 220d runs the same LCAs as all the other RWD F22s, so yes: the F8x LCAs are in fact direct bolt on

CFF · 01-07-2017, 12:16 PM

Thank you for the swift reply rwalker. I will def shop for some soon

rwalker · 01-11-2017, 06:30 PM

I just got out from under the front end of my car. I found that (at least on my car) the F8x LCAs are not a direct bolt-in replacement. They require a 1mm shim in the subframe mount in order to fit tightly...

I was under the car verifying that the inner LCA mounts were torqued properly and that it was done with wheels on the ground.

While I was loosening the bolt on the driver side, I noticed the mounting tabs moved a significant amount away from the arm's bushing center. After fully loosening, I found that the arm had a lot of play between the subframe tabs. A 2mm shim was too big to squeeze in the gap, but a 1mm shim fit nicely. This shim made the F8x arm fit like the stock arm (which I had on hand for comparison).

I guess my installer didn't bother checking this and just cranked the mounting bolt down, bending the subframe tabs a bit to meet the bushing center. This imperfect fit was causing noise (slight knock) in certain situations.

If you have the F8x LCAs, I recommend you check this out on your car. With the car on ramps (not jacked up), drop the belly pan and loosen the LCA mounting bolt (18mm bolt and nut).

I put the shims toward the front of the car because the shims I had on hand fit the front end of the bolt better (the bolt has a taper).

Noise is fixed.

pikcachu · 01-11-2017, 07:55 PM

Quote:

Originally Posted by rwalker

I just got out from under the front end of my car. I found that (at least on my car) the F8x LCAs are not a direct bolt-in replacement. They require a 1mm shim in the subframe mount in order to fit tightly...

I was under the car verifying that the inner LCA mounts were torqued properly and that it was done with wheels on the ground.

While I was loosening the bolt on the driver side, I noticed the mounting tabs moved a significant amount away from the arm's bushing center. After fully loosening, I found that the arm had a lot of play between the subframe tabs. A 2mm shim was too big to squeeze in the gap, but a 1mm shim fit nicely. This shim made the F8x arm fit like the stock arm (which I had on hand for comparison).

I guess my installer didn't bother checking this and just cranked the mounting bolt down, bending the subframe tabs a bit to meet the bushing center. This imperfect fit was causing noise (slight knock) in certain situations.

If you have the F8x LCAs, I recommend you check this out on your car. With the car on ramps (not jacked up), drop the belly pan and loosen the LCA mounting bolt (18mm bolt and nut).

I put the shims toward the front of the car because the shims I had on hand fit the front end of the bolt better (the bolt has a taper).

Noise is fixed.

Any pics?

jpnh · 01-11-2017, 08:26 PM

Quote:

Originally Posted by Beartato

Oh sick, that's good to know.

Turner Motorsport sells a kit. Seems like a good deal to me.

https://www.turnermotorsport.com/p-3...-arms/?pdk=AQE

Its a no fit for the 240 but G2G on a 235.....I thought there were no suspension changes from the 235 to 240?

rwalker · 01-11-2017, 08:49 PM

Quote:

Originally Posted by pikcachu

Any pics?

No pics, sorry. If you're interested, I could take a pic of the washer I used...

To get a proper width comparison shot I'd have to take an arm completely off the car, probably not fun. The knuckle nut is torqued to 125 lbft...

rwalker · 01-11-2017, 10:30 PM

Quote:

Originally Posted by jpnh

Its a no fit for the 240 but G2G on a 235.....I thought there were no suspension changes from the 235 to 240?

I think Turner just hasn't got around to updating the list of supported vehicles. The LCAs on the M240i are identical to those on the M235i according to realoem.com.

pikcachu · 01-12-2017, 06:22 AM

Quote:

Originally Posted by rwalker

Quote:

Originally Posted by pikcachu

Any pics?

No pics, sorry. If you're interested, I could take a pic of the washer I used...

To get a proper width comparison shot I'd have to take an arm completely off the car, probably not fun. The knuckle nut is torqued to 125 lbft...

That would be nice thanks

07-16-2015, 01:40 PM	#90
SteveInfante NewFinishColumbia/detailer 604 Rep 2,096 Posts Drives: 2015 F31 xDrive Join Date: Sep 2010 Location: Columbia, SC iTrader: (0)	I may try this when I get around to it. I just dropped my car off to ship to South Carolina this afternoon. I'm plotting arrival gifts. LOL. __________________ 328 F31 xDrive/OSM/Venetian Luxury Line/Cold Weather/Premium/Driving Assist/Nav/Tech "Golden Goose" 78' Honda CB400A project http://www.instagram.com/steve_inf31
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10-08-2015, 09:23 PM	#92
G4Z808 Private First Class 30 Rep 138 Posts Drives: not yet Join Date: Jun 2013 Location: San antonio, TX iTrader: (0)	I see gsr only has one listing for the lca on their site and it didn't come with the leveling rods. where are everybody getting their leveling rods
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01-04-2017, 04:17 PM	#94
Beartato Major 882 Rep 1,202 Posts Drives: M235i Join Date: Jan 2016 Location: Utah iTrader: (0)	Thread's kind of old, but I just had a question. Forgive my ignorance, but would this mod change the wheel/strut clearance? From reading the thread it seems to, just double checking to make sure I'm understanding this right. For reference my summer wheels are 18x8.5 with an offset of 40. I don't run spacers and I've got maybe 1 cm of clearance between the wheel and strut.
	Appreciate 0 Quote

01-04-2017, 04:54 PM	#99
rwalker Major 330 Rep 1,084 Posts Drives: the wheels off Join Date: Nov 2006 Location: San Diego, CA iTrader: (1)	info in this thread: http://www.2addicts.com/forums/showthread.php?t=1250352 this post: http://www.2addicts.com/forums/showp...1&postcount=41 __________________ rwalker@rwalker.com (I really dislike Private Messaging)
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01-05-2017, 09:11 PM	#101
CFF New Member 6 Rep 22 Posts Drives: F22 220D Join Date: Jun 2015 Location: Taiwan iTrader: (0)	Hi all, I am currently located in Taiwan, I have a F22 220D wondering if M3 LCAs are in fact direct bolt on, thanx!!!
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01-07-2017, 08:53 AM	#102
CFF New Member 6 Rep 22 Posts Drives: F22 220D Join Date: Jun 2015 Location: Taiwan iTrader: (0)	No one??
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01-07-2017, 09:27 AM	#103
rwalker Major 330 Rep 1,084 Posts Drives: the wheels off Join Date: Nov 2006 Location: San Diego, CA iTrader: (1)	according to realoem, the 220d runs the same LCAs as all the other RWD F22s, so yes: the F8x LCAs are in fact direct bolt on
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01-07-2017, 12:16 PM	#104
CFF New Member 6 Rep 22 Posts Drives: F22 220D Join Date: Jun 2015 Location: Taiwan iTrader: (0)	Thank you for the swift reply rwalker. I will def shop for some soon
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01-11-2017, 06:30 PM	#105
rwalker Major 330 Rep 1,084 Posts Drives: the wheels off Join Date: Nov 2006 Location: San Diego, CA iTrader: (1)	I just got out from under the front end of my car. I found that (at least on my car) the F8x LCAs are not a direct bolt-in replacement. They require a 1mm shim in the subframe mount in order to fit tightly... I was under the car verifying that the inner LCA mounts were torqued properly and that it was done with wheels on the ground. While I was loosening the bolt on the driver side, I noticed the mounting tabs moved a significant amount away from the arm's bushing center. After fully loosening, I found that the arm had a lot of play between the subframe tabs. A 2mm shim was too big to squeeze in the gap, but a 1mm shim fit nicely. This shim made the F8x arm fit like the stock arm (which I had on hand for comparison). I guess my installer didn't bother checking this and just cranked the mounting bolt down, bending the subframe tabs a bit to meet the bushing center. This imperfect fit was causing noise (slight knock) in certain situations. If you have the F8x LCAs, I recommend you check this out on your car. With the car on ramps (not jacked up), drop the belly pan and loosen the LCA mounting bolt (18mm bolt and nut). I put the shims toward the front of the car because the shims I had on hand fit the front end of the bolt better (the bolt has a taper). Noise is fixed. __________________ rwalker@rwalker.com (I really dislike Private Messaging) Last edited by rwalker; 01-11-2017 at 06:58 PM..
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