Eibach Springs

[gatorfast]

Looks perfect

[AMOR]

Originally Posted by espressoo

I haven't logged that many miles since the install but I personally don't feel any noticeable differences. I think the spring ratings on the V2 and ZCP fronts are pretty close to one another. Looks wise it's fantastic. I'm no longer rocking the 4x4 stance.

Before



After

Hi, thanks for sharing! Looks good! Did you purchase 2 fronts from this german seller on ebay?
https://www.ebay.com/itm/2x-Eibach-L...4AAOSwa3ZbtDzl

Or is that v1 eu version?
How much does it cost to install 2 fronts?

[espressoo]

I purchased the whole set of V2 springs but only installed the fronts. Install was DIY.

[munki88]

Anyone had issues with these making noises like clicking and tapping

[MrSmartyPants]

Originally Posted by munki88

Anyone had issues with these making noises like clicking and tapping

Nope. About 8k miles on mine now.

[CanAutM3]

Originally Posted by munki88

Anyone had issues with these making noises like clicking and tapping

Zero issues in 40,000+ miles and 70+ track days on my previous 2015 M4.

[parabmw]

What are key things or potential problems to remember for proper install?

[MisterF80M3]

Originally Posted by munki88

Anyone had issues with these making noises like clicking and tapping

I feel like I hear some rattling on the front one.

[Juras]

Just received a package from US of V2 for M4 but to my surprise the serial number of the front is the same as EU = V1. So it is highly unlikely that the reworked rears (different serial number) had their spring rates changed with the fronts left as they were. This would mean spring rates were EU=V1=V2, which I think might have been already metnioned somewhere on this message board. Will try to fit them in January, will post pics b4 and after.

[Juras]

The truth is that the whole Eibach F8x issue related to V1 and V2 incl. raised rears on V1 and spring rates is a mess and nobody really knows anything for sure, its all speculations. My conclusions so far:

1) EU, V1, V2:

European version (assuming = V1) have been the same all way long with identical numbers for M3 and M4.
SET P/N: E10-20-031-09-22 (for sure EU, assuming also V1)
FRONT: F11-20-031-09-FA (for sure EU, assuming also V1)
REAR: F11-20-031-09-RA (for sure EU, assuming also V1)

V2 seems to have been revised for M3:
SET P/N: E10-20-036-01-22
FRONT: 11-20-036-01-FA
REAR: 11-20-036-01-RA

V2 for M4 however, oddly seem to be the same in front as V1 with the revised rears shared with M3:
SET P/N: E10-20-037-01-22
FRONT: 11-20-031-09-FA (not sure if missing F prefix from EU matters)
REAR: 11-20-036-01-RA

The weird thing is that on V1 there was a problem with raised M4s' rears. User CanAutM3 had this problem but claimed that it was due to some wrong batch and the problem was solved by Eibach sending different set of rears. Do you know however for sure that they didnt send you V2 rears? Can you post the rear P/N written on those springs?

MS springs as we know have additional plates for M3 going along with the same rear springs as in M4. Of course this means putting the OEM M3 rear spring would jack up the M4 rear. And in my educated guess this is what happened to V1 and not some wrong batch (I may be wrong of course). Has anyone with an M4 got the V1 and did not experience the jacked up rear and at the same time can confirm the V1 rear spring P/N as above? What if the V1 was sold at the end (after Eibach realized the f*ck up) with the V1 SET P/N but already including the revised rear springs? Could they also sell the "revised" rears which were essentially V2 but still had the V1 numbers?

Then the V2 gets officially introduced. They bring the entirely new set for M3 but change only rears on M4 - using M3 springs again! Sic! So the M4 goes down a bit at the rear comparing to V1 and stock (finally...) but the M3, for all the reasons explained above, goes down even more which makes many people here unhappy with them.

2) Still unexplained spring rate issue:

I have contacted quite a few people regarding this matter but nobody was able to explain this or direct me to a reliable source:
https://f80.bimmerpost.com/forums/sh...&postcount=953

[CanAutM3]

Originally Posted by Juras

The truth is that the whole Eibach F8x issue related to V1 and V2 incl. raised rears on V1 and spring rates is a mess and nobody really knows anything for sure, its all speculations. My conclusions so far:

1) EU, V1, V2:

European version (assuming = V1) have been the same all way long with identical numbers for M3 and M4.
SET P/N: E10-20-031-09-22 (for sure EU, assuming also V1)
FRONT: F11-20-031-09-FA (for sure EU, assuming also V1)
REAR: F11-20-031-09-RA (for sure EU, assuming also V1)

V2 seems to have been revised for M3:
SET P/N: E10-20-036-01-22
FRONT: 11-20-036-01-FA
REAR: 11-20-036-01-RA

V2 for M4 however, oddly seem to be the same in front as V1 with the revised rears shared with M3:
SET P/N: E10-20-037-01-22
FRONT: 11-20-031-09-FA (not sure if missing F prefix from EU matters)
REAR: 11-20-036-01-RA

The weird thing is that on V1 there was a problem with raised M4s' rears. User CanAutM3 had this problem but claimed that it was due to some wrong batch and the problem was solved by Eibach sending different set of rears. Do you know however for sure that they didnt send you V2 rears? Can you post the rear P/N written on those springs?

MS springs as we know have additional plates for M3 going along with the same rear springs as in M4. Of course this means putting the OEM M3 rear spring would jack up the M4 rear. And in my educated guess this is what happened to V1 and not some wrong batch (I may be wrong of course). Has anyone with an M4 got the V1 and did not experience the jacked up rear and at the same time can confirm the V1 rear spring P/N as above? What if the V1 was sold at the end (after Eibach realized the f*ck up) with the V1 SET P/N but already including the revised rear springs? Could they also sell the "revised" rears which were essentially V2 but still had the V1 numbers?

Then the V2 gets officially introduced. They bring the entirely new set for M3 but change only rears on M4 - using M3 springs again! Sic! So the M4 goes down a bit at the rear comparing to V1 and stock (finally...) but the M3, for all the reasons explained above, goes down even more which makes many people here unhappy with them.

2) Still unexplained spring rate issue:

I have contacted quite a few people regarding this matter but nobody was able to explain this or direct me to a reliable source:
https://f80.bimmerpost.com/forums/sh...&postcount=953

I have since sold the car, so I cannot re-confirm the part numbers of the installed springs. I however clearly recall that the part numbers were the same for my first springs that raised the rear vs the corrected ones that Eibach sent to me.

I can also confirm that not all early Eibach springs raised the rear, since I took many measurement from online pictures when I investigated my "raised rear" and all the pictures I measured resulted in a lowered rear with the Eibach. This is how I concluded that my situation was abnormal.

Eibach, while helpful, remained elusive as to what was causing the raised rear on my car. They seemed to say my car was peculiar and that they had "special springs" made expressly for my car (same total rod length more tightly wound to preserve spring rate but with a shorter relaxed height). I called BS on that and came to the conclusion that my original springs were simply not to spec and that they simply replaced them with good springs.

[Juras]

Of course anything is possible. I am just shocked that such a serious company with such history created highly vague circumstances both for jacked up rear and spring rates and is failing to clearly explain this, creates 2 different height patterns for m3 and m4 within the same version 2 of the spring which, judging by the part numbers, seems a bit chaotic move to save the situation under pressure. Instead of carefuly introducing 2 sets of drops. But maybe this is just me.

I have specifically imported the V2 for my M4 from US (for twice the total cost of EU which I could get locally!) as this was the mildest drop on the market that didn't carry the risk of jacking up the rear. But now analyzing this whole situation even deeper Im really having doubts if they have any clue in Eibach what they are doing. It is a pitty all other solutions are either too much of a drop or just plainly too expensive for such a mild drop. I most likely would have gave up Eibachs. But now as I have loaded I guess I will just take the risk and pull the triger.

[AMOR]

Originally Posted by Juras

The truth is that the whole Eibach F8x issue related to V1 and V2 incl. raised rears on V1 and spring rates is a mess and nobody really knows anything for sure, its all speculations. My conclusions so far:

1) EU, V1, V2:

European version (assuming = V1) have been the same all way long with identical numbers for M3 and M4.
SET P/N: E10-20-031-09-22 (for sure EU, assuming also V1)
FRONT: F11-20-031-09-FA (for sure EU, assuming also V1)
REAR: F11-20-031-09-RA (for sure EU, assuming also V1)

V2 seems to have been revised for M3:
SET P/N: E10-20-036-01-22
FRONT: 11-20-036-01-FA
REAR: 11-20-036-01-RA

V2 for M4 however, oddly seem to be the same in front as V1 with the revised rears shared with M3:
SET P/N: E10-20-037-01-22
FRONT: 11-20-031-09-FA (not sure if missing F prefix from EU matters)
REAR: 11-20-036-01-RA

The weird thing is that on V1 there was a problem with raised M4s' rears. User CanAutM3 had this problem but claimed that it was due to some wrong batch and the problem was solved by Eibach sending different set of rears. Do you know however for sure that they didnt send you V2 rears? Can you post the rear P/N written on those springs?

MS springs as we know have additional plates for M3 going along with the same rear springs as in M4. Of course this means putting the OEM M3 rear spring would jack up the M4 rear. And in my educated guess this is what happened to V1 and not some wrong batch (I may be wrong of course). Has anyone with an M4 got the V1 and did not experience the jacked up rear and at the same time can confirm the V1 rear spring P/N as above? What if the V1 was sold at the end (after Eibach realized the f*ck up) with the V1 SET P/N but already including the revised rear springs? Could they also sell the "revised" rears which were essentially V2 but still had the V1 numbers?

Then the V2 gets officially introduced. They bring the entirely new set for M3 but change only rears on M4 - using M3 springs again! Sic! So the M4 goes down a bit at the rear comparing to V1 and stock (finally...) but the M3, for all the reasons explained above, goes down even more which makes many people here unhappy with them.

2) Still unexplained spring rate issue:

I have contacted quite a few people regarding this matter but nobody was able to explain this or direct me to a reliable source:
https://f80.bimmerpost.com/forums/sh...&postcount=953

I read somewhere that the V2 (revised and those sold in US) springs are stiffer than V1, is that true? I'm willing to switch the fronts only on my ZCP M3 but I don't want to loose on handling as I track the car and the ZCP OEM springs are stiffer as far as I know. So if I get the V2 (US) springs for the front only, are they going to be close to ZCP in terms of stiffness? Or there is no difference between V1 and V2 (EU and US versions) ?

[Juras]

From what I have read in the first half of this thread, there was no difference in spring rates between V1 and V2. No one really knows what they are, officially they were between non-ZCP and ZCP but with front/rear ZCP ratio. But because V2 lowers F80 (only, not F82) more than V1 than due to more compressed shocks it could be the impression that they are stiffer. Also the bump stops could come into play earlier and more often adding some extra to it.

I have no experience with lowering the front only. Yet I know that some adviced against it due to potential throwing the car off balance, others decided to give it a go and reported all ok, especially after reseting EDC. Don't remember though which version it was and I would be especially cautious around V2 as in F80 it will drop the front significantly, this is no cosmetic aplication any more. Hence the difference between front and rear may become too big.

My advice: if you want the front only go with the V1, reset the EDC, check the alignment and keep your fingers crossed that the "off-balance theory" crowd was wrong.

[swifty]

Originally Posted by Juras

From what I have read in the first half of this thread, there was no difference in spring rates between V1 and V2. No one really knows what they are, officially they were between non-ZCP and ZCP but with front/rear ZCP ratio. But because V2 lowers F80 (only, not F82) more than V1 than due to more compressed shocks it could be the impression that they are stiffer. Also the bump stops could come into play earlier and more often adding some extra to it.

I have no experience with lowering the front only. Yet I know that some adviced against it due to potential throwing the car off balance, others decided to give it a go and reported all ok, especially after reseting EDC. Don't remember though which version it was and I would be especially cautious around V2 as in F80 it will drop the front significantly, this is no cosmetic aplication any more. Hence the difference between front and rear may become too big.

My advice: if you want the front only go with the V1, reset the EDC, check the alignment and keep your fingers crossed that the "off-balance theory" crowd was wrong.

How do we reset the EDC?

[Juras]

Originally Posted by swifty

How do we reset the EDC?

Someone who knows coding needs to reset your EDC height sensors through ICM.

[chujk1985]

Originally Posted by espressoo

This is an Eibach V2 front only install on a 2018 ZCP. I felt the rear OEM gap looked good enough so I left it unchanged. It's been about a week since install so perhaps it's still settling. Front and rear gaps are pretty similar in appearance. I added 12F and 10R MS spacers. 275/30/20 and 295/30/20 tires. Not super flush but much better in appearance than OEM.

What tires are you running in those upgraded sizes? Super sports or PS4S? No rubbing?

[parabmw]

If you coded cs EDC would that mean you don't need to reset anything?

[tr3flip]

Hello all,

When Eibach North America first started selling the M3/M4 Pro-Kit we purchased a handful of sets from Eibach Germany. They did the initial development and we cataloged them before we had test fitted them. This is normal for a model like the M3 since we've been doing this since the E30 M3 without having to make any changes.

Once we realized the OE static heights from the M3 and M4 were much different from each other we started designing our own version at Eibach North America. Eibach Germany has not reported any ride height issues on their end so we are unsure if there is a US and Euro spec suspension from BMW.

One thing to note is that the original front spring (F11-20-031-09-FA) part number remained the same but we've updated the design since creating the new part numbers for the M3 and M4.

Part# E10-20-031-09-22 (original M3 & M4 Pro-Kit from Eibach Germany)
Front = F11-20-031-09-FA (182lbs/in) (design date 9/21/15)
Rear = F11-20-031-09-RA (628lbs/in) (design date 9/21/15)
*DISCONTINUED IN THE US*


Part# E10-20-037-01-22 (M4 Pro-Kit)
Front = F11-20-031-09-FA (182lbs/in) (design date 9/21/15 - updated)
Rear = F11-20-036-01-RA (628lbs/in) (design date 11/17/16)
Lowers M4: 0.8 in/0.4 in

Part# E10-20-036-01-22 (M3 Pro-Kit)
Front = F11-20-036-01-FA (182lbs/in) (design date 11/30/16)
Rear = F11-20-036-01-RA (628lbs/in) (design date 11/17/16)
Lowers M3 Base: 1.0 in/0.5 in
Lowers M3 Comp: 0.8 in/0.5 in

[Juras]

Thank you for your answer. But, more or less conciously, you did give the ZCP spec for Eibachs:
https://f80.bimmerpost.com/forums/sh...&postcount=378

M3 (Comp. Pkg)
Front – 198 lbs/in
Rear – 685 lbs/in

Nearly 1:1.

And this was one of a few posts that you gave those rates in. Another example:

Originally Posted by tr3flip

Yes, one kit for both. Here are the specs which were posted on the previous page as well.

Front: 22mm lower at 200lb/in
Rear: 5mm lower at 685lb/in
Eibach Part# E10-20-031-09-22

Was this a mistake or am I totally lost here?

[AMOR]

Originally Posted by tr3flip

Hello all,

When Eibach North America first started selling the M3/M4 Pro-Kit we purchased a handful of sets from Eibach Germany. They did the initial development and we cataloged them before we had test fitted them. This is normal for a model like the M3 since we've been doing this since the E30 M3 without having to make any changes.

Once we realized the OE static heights from the M3 and M4 were much different from each other we started designing our own version at Eibach North America. Eibach Germany has not reported any ride height issues on their end so we are unsure if there is a US and Euro spec suspension from BMW.

One thing to note is that the original front spring (F11-20-031-09-FA) part number remained the same but we've updated the design since creating the new part numbers for the M3 and M4.

Part# E10-20-031-09-22 (original M3 & M4 Pro-Kit from Eibach Germany)
Front = F11-20-031-09-FA (182lbs/in) (design date 9/21/15)
Rear = F11-20-031-09-RA (628lbs/in) (design date 9/21/15)
*DISCONTINUED IN THE US*


Part# E10-20-037-01-22 (M4 Pro-Kit)
Front = F11-20-031-09-FA (182lbs/in) (design date 9/21/15 - updated)
Rear = F11-20-036-01-RA (628lbs/in) (design date 11/17/16)
Lowers M4: 0.8 in/0.4 in

Part# E10-20-036-01-22 (M3 Pro-Kit)
Front = F11-20-036-01-FA (182lbs/in) (design date 11/30/16)
Rear = F11-20-036-01-RA (628lbs/in) (design date 11/17/16)
Lowers M3 Base: 1.0 in/0.5 in
Lowers M3 Comp: 0.8 in/0.5 in

I have 2 EU spec eibach springs for the front only. Is it fine to install them with stock zcp rears or this will throw car off balance? Thank you.

[tr3flip]

Originally Posted by Juras

Thank you for your answer. But, more or less conciously, you did give the ZCP spec for Eibachs:
https://f80.bimmerpost.com/forums/sh...&postcount=378

M3 (Comp. Pkg)
Front – 198 lbs/in
Rear – 685 lbs/in

Nearly 1:1.

And this was one of a few posts that you gave those rates in. Another example:



Was this a mistake or am I totally lost here?

There may have been a change to the rate once we started making these springs in the US. Unfortunately, I don't have access to go and see every single iteration of the spring we've made. What I've posted yesterday is straight from our engineering files and is what we are making.