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      05-14-2010, 11:49 PM   #23
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I wish we were able to get more feedback about the ACS kit.
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      05-15-2010, 03:58 AM   #24
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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
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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
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It's not Sachs. People only think it's Sachs because LBM here said it was...
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      07-03-2010, 11:10 AM   #27
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Quote:
Originally Posted by rldzhao View Post
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
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      07-20-2010, 11:11 PM   #28
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Just confirmed: dampers are by KW.

http://www.insideline.com/bmw/m3/201...rst-drive.html
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      01-19-2011, 08:45 PM   #29
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Just found this clue on the rear spring rate: 140 N/mm = 800 lb/in
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      01-19-2011, 08:55 PM   #30
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Quote:
Originally Posted by rldzhao View Post
There a few mistakes in the article.
Forged 19" wheels...
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      01-19-2011, 08:56 PM   #31
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Quote:
Originally Posted by rldzhao View Post
Just found this clue on the rear spring rate: 140 N/mm = 800 lb/in
Same as KW Clubsports. Nice find.
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      01-24-2011, 05:16 AM   #32
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any BMW part # to order this suspension?
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      01-24-2011, 09:38 PM   #33
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You can't. GTS exclusive.
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      01-26-2011, 03:18 AM   #34
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Quote:
Originally Posted by marconi118 View Post
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.
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      01-26-2011, 09:51 AM   #35
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ClubSport front springs are a 510 lb/in rate, as a frame of refrence.
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      01-26-2011, 01:36 PM   #36
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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, 06:32 PM   #37
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But couldn't they be adjusted to a simlar dampening to the GTS since they're adjustable?
Is the GTS rebound/bound adjustable too?

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      01-26-2011, 06:52 PM   #38
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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, 07:53 AM   #39
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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, 08:18 AM   #40
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Quote:
Originally Posted by kaiv View Post
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 :-)
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      12-30-2012, 09:29 AM   #41
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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, 11:20 AM   #42
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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.
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      12-30-2012, 11:21 AM   #43
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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.
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