M3 GTS Suspension Upgrades

STALKER · 05-14-2010, 11:49 PM

I wish we were able to get more feedback about the ACS kit.

BMW269 · 05-15-2010, 03:58 AM

Maybe BMW anounced Sachs but put KW CS. G-Power also uses KW V3 or KW V3 CS for the M3. We also had another white M3 track car, in fact it was a stock M3 with KW V3 CS, Brembo, Akrapovic, OZ Superleggera and track tires. With all this it was faster than the M3 CSL.

STALKER · 06-23-2010, 07:56 PM

So did we figure out if it was the ACS(Sachs) kit or KW Clubsports?

rzm3 · 06-23-2010, 08:52 PM

It's not Sachs. People only think it's Sachs because LBM here said it was...

Bob MG · 07-03-2010, 11:10 AM

Quote:

Originally Posted by rldzhao

It's not Sachs. People only think it's Sachs because LBM here said it was...

My money is on KW, Sachs just manufacture th stock M3 suspension, hence the confusion.
Btw rotors are 378mm all around. I have seen them

can't post pics though or I will be killed

rzm3 · 07-20-2010, 11:11 PM

Just confirmed: dampers are by KW.

http://www.insideline.com/bmw/m3/201...rst-drive.html

rzm3 · 01-19-2011, 07:45 PM

Just found this clue on the rear spring rate: 140 N/mm = 800 lb/in

STALKER · 01-19-2011, 07:55 PM

Quote:

Originally Posted by rldzhao

Just confirmed: dampers are by KW.

http://www.insideline.com/bmw/m3/201...rst-drive.html

There a few mistakes in the article.
Forged 19" wheels...

STALKER · 01-19-2011, 07:56 PM

Quote:

Originally Posted by rldzhao

Just found this clue on the rear spring rate: 140 N/mm = 800 lb/in

Same as KW Clubsports. Nice find.

marconi118 · 01-24-2011, 04:16 AM

any BMW part # to order this suspension?

rzm3 · 01-24-2011, 08:38 PM

You can't. GTS exclusive.

HP Autosport · 01-26-2011, 02:18 AM

Quote:

Originally Posted by marconi118

any BMW part # to order this suspension?

If the coilovers on the GTS is indeed made by KW, just order a KW Club Sport kit and call it good. Spring rates and valving will be very similar.

We know the 800 lb rear springs is right where the rate should be. Did anyone confirm the front rates? 400-500F would be a good match to the 800R.

IND-Distribution · 01-26-2011, 08:51 AM

ClubSport front springs are a 510 lb/in rate, as a frame of refrence.

rzm3 · 01-26-2011, 12:36 PM

I've talked to a KW engineer in Germany. The GTS uses custom valved dampers specified by M GmbH. As for springs they are supposedly "custom" as well, but "similar" to the CS kit.

Front rate is not yet confirmed, but length is 170 mm.
Rear rate is 140 N/mm (799#/in), length is unknown.

aus · 01-26-2011, 05:32 PM

But couldn't they be adjusted to a simlar dampening to the GTS since they're adjustable?
Is the GTS rebound/bound adjustable too?

.

rzm3 · 01-26-2011, 05:52 PM

Depends on how different they really are... there are many things you can play with to create a damping curve, it's not simply more damping, or less damping.

kaiv · 12-30-2012, 06:53 AM

I've been scouting the web, hoping to find someone posting detailed pictures of their own GTS but no luck so far.

On another note -and I'm sure this has been discussed before- I find it really interesting how BMW used to make really cool custom parts on its special versions (eg: E36 GT, E46 CSL) but on the E92 they appear to have gone with stuff that is pretty much off the shelf.

Anyhow I found this pic of the suspension tool kit of the GTS. Those who have KW coilovers should be familiar with it!

Beedub · 12-30-2012, 07:18 AM

Quote:

Originally Posted by kaiv

I've been scouting the web, hoping to find someone posting detailed pictures of their own GTS but no luck so far.

On another note -and I'm sure this has been discussed before- I find it really interesting how BMW used to make really cool custom parts on its special versions (eg: E36 GT, E46 CSL) but on the E92 they appear to have gone with stuff that is pretty much off the shelf.

Anyhow I found this pic of the suspension tool kit of the GTS. Those who have KW coilovers should be familiar with it!

niicceee find!!!!! never seen that image before!! i love little details like this :-)

mlhj83 · 12-30-2012, 08:29 AM

Does the GTS have any reinforcement for the unibody, particularly where the subframe and struts mount? All the previous BMWs seem to suffer from cracked boot floors and mushroomed strut towers from hard driving especially with firmer suspension.

Malek@MRF · 12-30-2012, 10:20 AM

As Richard said, the GTS uses a custom iteration of the KW Clubsport suspension set. Many often times thought it had the KW competition suspension, but it does not.

It is not Sachs, or any other brand.

Malek@MRF · 12-30-2012, 10:21 AM

Quote:

Originally Posted by mlhj83

Does the GTS have any reinforcement for the unibody, particularly where the subframe and struts mount? All the previous BMWs seem to suffer from cracked boot floors and mushroomed strut towers from hard driving especially with firmer suspension.

The GTS uses a unitized rear subframe and stiffer rubber differential bushings. The strut tower mounts in the E92 are already well designed and strong.

05-14-2010, 11:49 PM	#23
STALKER Brigadier General 169 Rep 3,831 Posts Drives: 997.2 GT3, Golf R Join Date: Feb 2009 Location: Toronto, ON iTrader: (5)	I wish we were able to get more feedback about the ACS kit. __________________
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05-15-2010, 03:58 AM	#24
BMW269 Brigadier General 431 Rep 3,888 Posts Drives: BMW Join Date: Jul 2009 Location: Germany iTrader: (0)	Maybe BMW anounced Sachs but put KW CS. G-Power also uses KW V3 or KW V3 CS for the M3. We also had another white M3 track car, in fact it was a stock M3 with KW V3 CS, Brembo, Akrapovic, OZ Superleggera and track tires. With all this it was faster than the M3 CSL.
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06-23-2010, 07:56 PM	#25
STALKER Brigadier General 169 Rep 3,831 Posts Drives: 997.2 GT3, Golf R Join Date: Feb 2009 Location: Toronto, ON iTrader: (5)	So did we figure out if it was the ACS(Sachs) kit or KW Clubsports? __________________
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06-23-2010, 08:52 PM	#26
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	It's not Sachs. People only think it's Sachs because LBM here said it was...
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07-20-2010, 11:11 PM	#28
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	Just confirmed: dampers are by KW. http://www.insideline.com/bmw/m3/201...rst-drive.html
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01-19-2011, 07:45 PM	#29
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	Just found this clue on the rear spring rate: 140 N/mm = 800 lb/in Attached Images
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01-24-2011, 04:16 AM	#32
marconi118 Major 94 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	any BMW part # to order this suspension?
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01-24-2011, 08:38 PM	#33
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	You can't. GTS exclusive.
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01-26-2011, 08:51 AM	#35
IND-Distribution BimmerPost Supporting Vendor 9571 Rep 10,851 Posts Drives: G82 M4 / G87 M2 Join Date: Oct 2006 Location: Chicago iTrader: (3)	ClubSport front springs are a 510 lb/in rate, as a frame of refrence. __________________ IND DISTRIBUTION \| 866-963-4520 • INSTAGRAM • YOUTUBE • FACEBOOK • FLICKR
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01-26-2011, 12:36 PM	#36
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	I've talked to a KW engineer in Germany. The GTS uses custom valved dampers specified by M GmbH. As for springs they are supposedly "custom" as well, but "similar" to the CS kit. Front rate is not yet confirmed, but length is 170 mm. Rear rate is 140 N/mm (799#/in), length is unknown.
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01-26-2011, 05:32 PM	#37
aus Major General 890 Rep 9,031 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	But couldn't they be adjusted to a simlar dampening to the GTS since they're adjustable? Is the GTS rebound/bound adjustable too? . __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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01-26-2011, 05:52 PM	#38
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	Depends on how different they really are... there are many things you can play with to create a damping curve, it's not simply more damping, or less damping.
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12-30-2012, 06:53 AM	#39
kaiv IG: limited.slip 328 Rep 1,917 Posts Drives: E46 M3 in a 325i Touring body! Join Date: Mar 2010 Location: San Diego, CA iTrader: (31)	I've been scouting the web, hoping to find someone posting detailed pictures of their own GTS but no luck so far. On another note -and I'm sure this has been discussed before- I find it really interesting how BMW used to make really cool custom parts on its special versions (eg: E36 GT, E46 CSL) but on the E92 they appear to have gone with stuff that is pretty much off the shelf. Anyhow I found this pic of the suspension tool kit of the GTS. Those who have KW coilovers should be familiar with it!
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12-30-2012, 08:29 AM	#41
mlhj83 Scythe-Meister 90 Rep 1,053 Posts Drives: '11 E92 M3 ZCP \| F80 M3 CS Join Date: Aug 2011 Location: London iTrader: (0)	Does the GTS have any reinforcement for the unibody, particularly where the subframe and struts mount? All the previous BMWs seem to suffer from cracked boot floors and mushroomed strut towers from hard driving especially with firmer suspension.
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12-30-2012, 10:20 AM	#42
Malek@MRF BimmerPost Supporting Vendor 731 Rep 3,735 Posts Drives: E92 M3, E46 M3, G82 M4 Join Date: Jan 2008 Location: Irvine, California iTrader: (5)	As Richard said, the GTS uses a custom iteration of the KW Clubsport suspension set. Many often times thought it had the KW competition suspension, but it does not. It is not Sachs, or any other brand. __________________ BMW PERFORMANCE SPECIALISTS. Race Engines. Suspension. F/I. Brakes. Race Preparation. Factory Service. Alignments. OFFICIAL PARTNERS: KW. MOTON. Brembo. AP Racing. BBS Motorsport. iND. HRE. Turner Motorsport. VAC. BMW Motorsport. Facebook \| Instagram \| Yelp! \| Flikr Phone: 949-233-0448 \| E-Mail: info@mrfengineering.com
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