[M5KEITH]

Those who dropped with these springs any issues going over speed bumps?

Thanks

[josec70]

Zero issues

[BMA89]

Originally Posted by M5KEITH

Those who dropped with these springs any issues going over speed bumps?

Thanks

Zero issues - I love mine and highly recommend

[Igor_M5]

Anyone lowered happened to check the top of their shock towers? 😐

[aj_g80]

Originally Posted by Igor_M5

Anyone lowered happened to check the top of their shock towers? 😐

no.

and no OP.

[M5KEITH]

Originally Posted by Igor_M5

Anyone lowered happened to check the top of their shock towers? 😐

Why?

[Igor_M5]

Originally Posted by M5KEITH

Why?

Im suspecting a possible design flaw that's being kept under a dirty rug, with some odd irregularities with aftermarket suppliers to support my suspicion.

Lift the plastic cover that's part of the dust boot for the shock tower and inspect for stress marks, in particular the 6 o clock area if you were standing along side the fender.

Ill only post details if I see a 3rd victim.

Edit; if you happen to discover something, feel free to PM me first .

[DryBark]

Originally Posted by Igor_M5

Im suspecting a possible design flaw that's being kept under a dirty rug, with some odd irregularities with aftermarket suppliers to support my suspicion.

Lift the plastic cover that's part of the dust boot for the shock tower and inspect for stress marks, in particular the 6 o clock area if you were standing along side the fender.

Ill only post details if I see a 3rd victim.

Edit; if you happen to discover something, feel free to PM me first .

Aftermarket design flaw or stock tower flaw, or stock tower flaw caused by aftermarket design?

[pbonsalb]

In the past, some BMW have suffered deformed /such as mushrooming) or failing (such as stress cracks and cracks) in the strut towers and even the rear shock tower sheet metal. I am most familiar with this on the E36 and don’t know whether it is an issue on any other models. Obviously stiffer springs increase the stress on the sheet metal tower tops.

[dcohen13]

Originally Posted by Igor_M5

Im suspecting a possible design flaw that's being kept under a dirty rug, with some odd irregularities with aftermarket suppliers to support my suspicion.

Lift the plastic cover that's part of the dust boot for the shock tower and inspect for stress marks, in particular the 6 o clock area if you were standing along side the fender.

Ill only post details if I see a 3rd victim.

Edit; if you happen to discover something, feel free to PM me first .

I tried to PM you, but your inbox is full. I am hearing a banging type noise on bumps after having my Eibach pro kit installed for a few months. Only coming from passenger front wheel. Could this be the issue? Only happens after some hard driving at times...

[dcohen13]

Originally Posted by josec70

Zero issues

Any rubbing at full lock, or while driving over dips at highway speed?

[josec70]

Originally Posted by dcohen13

Any rubbing at full lock, or while driving over dips at highway speed?

No issues whatsoever at full lock or over dips.

I’m now on KW V4’s but was on the HR 550’s for several years (2 F90 M5’s) with zero issues.

[dcohen13]

Originally Posted by josec70

No issues whatsoever at full lock or over dips.

I’m now on KW V4’s but was on the HR 550’s for several years (2 F90 M5’s) with zero issues.

Thank you very much for the quick response! Your offset/sizing was not factory was it? I am not flush or aggressive, but I am slightly further out compared to OEM. Pretty much running Titan7 Specs from their wheels. (different brand though)

[pbonsalb]

If there is banging on bumps from just the passenger side, there is a problem. It’s not that Eibach springs are bad and H&R springs for a different BMW, the 550xi, would be better. I’d find the problem and fix it. Then decide if you want lower or stiffer or adjustable springs.

I have a slight groan and occasional knock or bump at very low speeds since installing front monoballs and lowering springs. Not sure which it is related to. The groan sounds rubbery like upper strut bearings. The knock or bump sounds a bit like the rod ends. CD drives and handles and aligns fine, but I would like to find the issue at some point. Apparently some other BMW have had tie rod issues that give a bump or knock at low speed, but I have not read of this yet for the F90.

[josec70]

Originally Posted by dcohen13

Thank you very much for the quick response! Your offset/sizing was not factory was it? I am not flush or aggressive, but I am slightly further out compared to OEM. Pretty much running Titan7 Specs from their wheels. (different brand though)

On my current F90, I ran 5/12 spacers on the factory set up with no issues. I also ran 21” wheels with aggressive offsets on my prior F90 with no issues.

Both were on the 550’s.

Hope this helps.

[Desking101]

Originally Posted by dcohen13

I tried to PM you, but your inbox is full. I am hearing a banging type noise on bumps after having my Eibach pro kit installed for a few months. Only coming from passenger front wheel. Could this be the issue? Only happens after some hard driving at times...

not normal at all. i have the same springs and no noises

[eZmoney Ed]

Originally Posted by dcohen13

I tried to PM you, but your inbox is full. I am hearing a banging type noise on bumps after having my Eibach pro kit installed for a few months. Only coming from passenger front wheel. Could this be the issue? Only happens after some hard driving at times...

I had similar noise after installing springs, front passenger as well. I ended up getting the struts replaced and noise is gone.

[dcohen13]

Originally Posted by eZmoney Ed

I had similar noise after installing springs, front passenger as well. I ended up getting the struts replaced and noise is gone.

ahh so BMW was able to confirm the strut was blown? Thanks!

[eZmoney Ed]

Originally Posted by dcohen13

ahh so BMW was able to confirm the strut was blown? Thanks!

Dealership could not confirm it was blown in my case. The tech advised to start with replacing the strut and if noise continues, explore other potential causes. I ended up replacing both front struts and swapped from h&r m550 springs to kw has. That fixed it for me.