ACS springs on F31 alignment results

328iX · 03-22-2019, 02:41 PM

Just thought I'd share results for alignment due to there not being much information when I researched it.

Very surprising results as there's almost no change, honestly feel like I wasted $100 but fixing toe is always a good thing.

F31
18" 397s
5mm spacers

Skyhigh · 03-25-2019, 03:12 AM

Good stuff.
May I ask what your impression from the ACS springs is? (I see you also have an XDrive).

I am planning to put them on my XDrive Adaptive, whereas my hope is moderate drop (coherent look), maintained comfort in Comfort and gladly a bit more stiffness in Sport...

328iX · 03-25-2019, 06:13 AM

Quote:

Originally Posted by Skyhigh

Good stuff.
May I ask what your impression from the ACS springs is? (I see you also have an XDrive).

I am planning to put them on my XDrive Adaptive, whereas my hope is moderate drop (coherent look), maintained comfort in Comfort and gladly a bit more stiffness in Sport...

I love it. The handling is very noticeably improved and the comfort feels identical to stock.

Skyhigh · 03-25-2019, 06:20 AM

Good to hear. My only concern is warranty... Been warned by all dealerships I contacted that this is risky, as BMW can decline warranty claims related to suspension...
And ACS are apparently not overtaing eny responsibility either.

328iX · 03-25-2019, 09:40 AM

Quote:

Originally Posted by Skyhigh

Good to hear. My only concern is warranty... Been warned by all dealerships I contacted that this is risky, as BMW can decline warranty claims related to suspension...
And ACS are apparently not overtaing eny responsibility either.

Yeah definitely not due to the fact that the struts have a usable working range. By lowering you're affecting that range and travel and could blow them out.

Thankfully ACS springs are mild so you really shouldn't blow them out. Also struts are fairly cheap. Nothing to worry about.

Skyhigh · 03-25-2019, 09:45 AM

Not sure the struts for adaptive suspension are so cheap...?

328iX · 03-25-2019, 10:23 AM

Quote:

Originally Posted by Skyhigh

Not sure the struts for adaptive suspension are so cheap...?

oh right, yeah haha.

FaRKle! · 03-25-2019, 10:41 AM

I've had Eibach springs on my adaptive damper car for a year and ~20k miles. This is with plenty of track days and also dirt/gravel/trail road driving. No issues with the dampers. In fact I just dynoed the adaptive dampers yesterday and they're able to put out lots of compression/rebound force, on par or greater than aftermarket dampers like the Bilstein B6. That said, BMW's EDC profile/programming doesn't let them do those max rates, but the dampers are physically capable of it.

Eibach makes ACS springs, and I'm pretty darn convinced that ACS just picks different Eibach springs from their catalog, stamps their logo/PN on there and sells it as is (they may bundle them slightly differently). I came to that conclusion looking at the documentation from each company and comparing spring specs and test data.

Skyhigh · 03-25-2019, 11:54 AM

That's good to hear.
Unfortunately sometimes components fail just because they do... not necessarily as a consequence of an upgrade/change. Then BMW could deny warranty because of the aftermarket springs and that sucks.

One of the dealerships advised me that if I am to put ACS (or other aftermarket springs) there, I will need to sign a "tuning declaration" where I acknowledge that I am aware of the effect on warranty the tuning may have. The declaration is then sent to Munich.

johnung · 03-25-2019, 02:55 PM

Quote:

Originally Posted by FaRKle!

I've had Eibach springs on my adaptive damper car for a year and ~20k miles. This is with plenty of track days and also dirt/gravel/trail road driving. No issues with the dampers. In fact I just dynoed the adaptive dampers yesterday and they're able to put out lots of compression/rebound force, on par or greater than aftermarket dampers like the Bilstein B6. That said, BMW's EDC profile/programming doesn't let them do those max rates, but the dampers are physically capable of it.

Eibach makes ACS springs, and I'm pretty darn convinced that ACS just picks different Eibach springs from their catalog, stamps their logo/PN on there and sells it as is (they may bundle them slightly differently). I came to that conclusion looking at the documentation from each company and comparing spring specs and test data.

Quote:

Originally Posted by FaRKle!

I've had Eibach springs on my adaptive damper car for a year and ~20k miles. This is with plenty of track days and also dirt/gravel/trail road driving. No issues with the dampers. In fact I just dynoed the adaptive dampers yesterday and they're able to put out lots of compression/rebound force, on par or greater than aftermarket dampers like the Bilstein B6. That said, BMW's EDC profile/programming doesn't let them do those max rates, but the dampers are physically capable of it.

Eibach makes ACS springs, and I'm pretty darn convinced that ACS just picks different Eibach springs from their catalog, stamps their logo/PN on there and sells it as is (they may bundle them slightly differently). I came to that conclusion looking at the documentation from each company and comparing spring specs and test data.

Totally agree with you about ACS. Heard the same thing when I was researching and saw the specs were the same. Why pay the markup to ACS? Bought Eibachs and have been very happy!

03-22-2019, 02:41 PM	#1
328iX David 787 Rep 2,009 Posts Drives: 2015 328iX F31 Join Date: Nov 2018 Location: Temecula, CA iTrader: (0)	ACS springs on F31 alignment results Just thought I'd share results for alignment due to there not being much information when I researched it. Very surprising results as there's almost no change, honestly feel like I wasted $100 but fixing toe is always a good thing. F31 18" 397s 5mm spacers Attached Images __________________ F31 Suspension guide & discussion Last edited by 328iX; 03-22-2019 at 03:30 PM..
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03-25-2019, 03:12 AM	#2
Skyhigh Brigadier General 1927 Rep 3,910 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	Good stuff. May I ask what your impression from the ACS springs is? (I see you also have an XDrive). I am planning to put them on my XDrive Adaptive, whereas my hope is moderate drop (coherent look), maintained comfort in Comfort and gladly a bit more stiffness in Sport... __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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03-25-2019, 06:20 AM	#4
Skyhigh Brigadier General 1927 Rep 3,910 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	Good to hear. My only concern is warranty... Been warned by all dealerships I contacted that this is risky, as BMW can decline warranty claims related to suspension... And ACS are apparently not overtaing eny responsibility either. __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
	Appreciate 0 Quote

03-25-2019, 09:45 AM	#6
Skyhigh Brigadier General 1927 Rep 3,910 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	Not sure the struts for adaptive suspension are so cheap...? __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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03-25-2019, 10:41 AM	#8
FaRKle! Brigadier General 4043 Rep 3,549 Posts Drives: 328d Wagon, M2 Comp, i4 eD35 Join Date: Sep 2016 Location: Bay Area, CA iTrader: (4) Garage List 2023 BMW i4 eDrive 35 [5.00] 2017 BMW 328dx Wagon [10.00] 2021 BMW M2 Competi ... [5.00]	I've had Eibach springs on my adaptive damper car for a year and ~20k miles. This is with plenty of track days and also dirt/gravel/trail road driving. No issues with the dampers. In fact I just dynoed the adaptive dampers yesterday and they're able to put out lots of compression/rebound force, on par or greater than aftermarket dampers like the Bilstein B6. That said, BMW's EDC profile/programming doesn't let them do those max rates, but the dampers are physically capable of it. Eibach makes ACS springs, and I'm pretty darn convinced that ACS just picks different Eibach springs from their catalog, stamps their logo/PN on there and sells it as is (they may bundle them slightly differently). I came to that conclusion looking at the documentation from each company and comparing spring specs and test data.
	Appreciate 1 Operator Mo64.50 Quote

03-25-2019, 11:54 AM	#9
Skyhigh Brigadier General 1927 Rep 3,910 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	That's good to hear. Unfortunately sometimes components fail just because they do... not necessarily as a consequence of an upgrade/change. Then BMW could deny warranty because of the aftermarket springs and that sucks. One of the dealerships advised me that if I am to put ACS (or other aftermarket springs) there, I will need to sign a "tuning declaration" where I acknowledge that I am aware of the effect on warranty the tuning may have. The declaration is then sent to Munich. __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
	Appreciate 0 Quote