MCS Triples or Ohlins TTX Triples?

[SYT_Shadow]

Originally Posted by //steve\\

I want 3-ways only because you say they are that much better than the 2WNR and I'm already very very happy with them.

I wouldn't have believed the difference had someone told me years ago when I started down this path.

The CS has the 3W since 2 weeks ago, the 2WNR is off the car. So now both the E90 and the CS have 3W

[e36clubracer]

Originally Posted by SYT_Shadow

Sweet! Just like my setup except 3W vs 4W

For highway driving I run the HS comp at 0. Perfect for expansion joints etc

I'll have to try that. I'm open to any and all suggestions from anybody to try out. Obviously everybody has their own feelings or perceptions on what they think will work and for me right now it's all experimentation.

My current setting are close to what BW suggested to start with on track but it feels pretty good on the street too. Do you see the same on their settings or do you dial more to start for track use?

[//steve\\]

Originally Posted by SYT_Shadow

I wouldn't have believed the difference had someone told me years ago when I started down this path.

The CS has the 3W since 2 weeks ago, the 2WNR is off the car. So now both the E90 and the CS have 3W

What spring rates are you running on them?

MCS is also less than 5 miles from my house

[SYT_Shadow]

Originally Posted by //steve\\

What spring rates are you running on them?

MCS is also less than 5 miles from my house

On my E90: 700/1000
On my F80: 800/700 (full coilover rear)

Wyatt is a super good dude!!

[SYT_Shadow]

Originally Posted by e36clubracer

I'll have to try that. I'm open to any and all suggestions from anybody to try out. Obviously everybody has their own feelings or perceptions on what they think will work and for me right now it's all experimentation.

My current setting are close to what BW suggested to start with on track but it feels pretty good on the street too. Do you see the same on their settings or do you dial more to start for track use?

I use what BW developed on my E90 3W including sway bar settings and canister pressures. Even ride heights.

On the street i take high speed compression to 0

[Small Yellow]

Originally Posted by e36clubracer

The MCS 4 ways have been installed. Yes its stiff, but its honestly not bad at all. I've driven it a handful of times on my work commute 25 miles each way and its been a joy to drive even with shitty CA roads.

I did a bunch of dialing of the shock settings so far for street I landed on this -

Front Rebound HS - 8
Front Rebond LS - 8

Front Compression HS - 9
Front Compression LS - 9

Rear Rebound HS - 8
Rear Rebound LS - 8

Rear Compression HS - 8
Rear Compression LS - 8

These are a bit different than what BW recommended. I figure once I get on track I'll likely turn these up.

Spring rates are -

6" - 800 # Front
8" - 1100 # Rear (divorced)

Also at the same time I installed -

Hotchkis sway bars set to full stiff up front and full soft out back to start
Solid rear subframe bushings
Front control arm bushings
Rear lower control arm bushings
Bimmerworld performance engine mounts (stock were already tearing @62k miles)

It is an amazingly drastic change from before. I had to completely re-adjust my expectations of what the car could do from the stock shocks and H&R race springs from before.

Sorry for reviving an old thread, I’m curious if you updated your adjustments by any chance after track?
I also have MCS4W however spring rates are 650/550 2.25” Hyperco spring true rear coilover setup.
Aside from the MCS coilovers, Essex AP F/R BBK, and 18x10.5 et 22 wrapped in RE71r the car is pretty much stock.
I noticed on the road going under 40mph its a little bouncy, however on freeway/canyons its a lot better and the grip in the canyons is pretty good.

My current adjustment settings are:
Front L/H
Compression 4/5
Rebound 5/7

Rear L/H
Compression 3/3
Rebound 4/5

I tried 1 click more HSC in the canyons and it was too bumpy so I am not too sure going up more on the adjustments.
I’ll be at BW 9/29 to dial it in.

Basically, do you get the bouncy/jello feel at low speeds as well?

[e36clubracer]

Originally Posted by Small Yellow

Sorry for reviving an old thread, I’m curious if you updated your adjustments by any chance after track?
I also have MCS4W however spring rates are 650/550 2.25” Hyperco spring true rear coilover setup.
Aside from the MCS coilovers, Essex AP F/R BBK, and 18x10.5 et 22 wrapped in RE71r the car is pretty much stock.
I noticed on the road going under 40mph its a little bouncy, however on freeway/canyons its a lot better and the grip in the canyons is pretty good.

My current adjustment settings are:
Front L/H
Compression 4/5
Rebound 5/7

Rear L/H
Compression 3/3
Rebound 4/5

I tried 1 click more HSC in the canyons and it was too bumpy so I am not too sure going up more on the adjustments.
I’ll be at BW 9/29 to dial it in.

Basically, do you get the bouncy/jello feel at low speeds as well?

Yeah it can get a bit bouncy depending on the surface. Also your front rate is a little lower than I would expect. I wouldn't put much into street driving comfort vs. track performance.

With that you may try running the compression all the way down to see if it softens up what you're feeling? Mine was a bit harsh on freeway joints and running it all the way down made it much better. But honestly overall I feel its very streetable. A lot of people told me it was going to be awful but it rides better than the car previously with OE shocks and H&R race springs.

[Small Yellow]

Originally Posted by e36clubracer

Yeah it can get a bit bouncy depending on the surface. Also your front rate is a little lower than I would expect. I wouldn't put much into street driving comfort vs. track performance.

With that you may try running the compression all the way down to see if it softens up what you're feeling? Mine was a bit harsh on freeway joints and running it all the way down made it much better. But honestly overall I feel its very streetable. A lot of people told me it was going to be awful but it rides better than the car previously with OE shocks and H&R race springs.

Hey thanks for getting back to me. Good to hear that its not just me and its probably normal. It drives fine at speed in canyon (really darn well in fact) and cant wait to further dial it in at track. You are right, when I picked up this car for track use the previous owner had OE shocks and H&R springs. It was terrible haha.

[SYT_Shadow]

I run high speed compression at zero, even low speed compression down to 2 or so for street use. It makes it perfectly liveable even with 800/700 rear coilover

[Small Yellow]

Originally Posted by SYT_Shadow

I run high speed compression at zero, even low speed compression down to 2 or so for street use. It makes it perfectly liveable even with 800/700 rear coilover

Thanks for your feedback! I'll give it a proper shake down at Buttonwillow and see if more spring rates are required.

[e36clubracer]

You'll have a blast at Buttonwillow. You will likely have to turn the shocks back up quite a bit to get them to where you want. Buttonwillow is not super bumpy but you'll get to test them quite a bit!

[Small Yellow]

Originally Posted by e36clubracer

You'll have a blast at Buttonwillow. You will likely have to turn the shocks back up quite a bit to get them to where you want. Buttonwillow is not super bumpy but you'll get to test them quite a bit!

Yeah I believe I would. The shake down I did in the canyon was surprising as I based it off of other's settings here and it was not taking the bumps well. I do suspect it might have to do with my lower spring rates.

Also Shadow another question for you. Did you reinforce your rear strut towers with true coilover setup? I dont have it done yet but I plan to once I have the welded half cage in.

[SYT_Shadow]

Originally Posted by Small Yellow

Yeah I believe I would. The shake down I did in the canyon was surprising as I based it off of other's settings here and it was not taking the bumps well. I do suspect it might have to do with my lower spring rates.

Also Shadow another question for you. Did you reinforce your rear strut towers with true coilover setup? I dont have it done yet but I plan to once I have the welded half cage in.

I didn't.

I have typically been conservative with this 'true rear coilover' on previous gen M3s. In those, people said they were running full coilover without issues but I never felt comfortable.
The E46 was made out of paper maiche and the E9X, although much stronger, still had a passthrough shock.

I do all my own work, so it was clear when installing suspension on the F80CS the first time that the rear structure is very different in the F8X. The sheet metal does not have a perforation for the shock to fit through and is an 'eye to eye' design. Also, it has a large spreader plate to distribute the forces.

After that first install, all subsequent setups have been rear coilovers and here we are, 3 years later, countless track days, curbs and street miles on the car and the surface in the rear where the spring now rests looks perfect.

To clarify as we are in the E9X subforum: my E90 track car uses a divorced rear setup. My F80CS track car uses a full rear coilover

[Small Yellow]

Originally Posted by SYT_Shadow

I didn't.

I have typically been conservative with this 'true rear coilover' on previous gen M3s. In those, people said they were running full coilover without issues but I never felt comfortable.
The E46 was made out of paper maiche and the E9X, although much stronger, still had a passthrough shock.

I do all my own work, so it was clear when installing suspension on the F80CS the first time that the rear structure is very different in the F8X. The sheet metal does not have a perforation for the shock to fit through and is an 'eye to eye' design. Also, it has a large spreader plate to distribute the forces.

After that first install, all subsequent setups have been rear coilovers and here we are, 3 years later, countless track days, curbs and street miles on the car and the surface in the rear where the spring now rests looks perfect.

To clarify as we are in the E9X subforum: my E90 track car uses a divorced rear setup. My F80CS track car uses a full rear coilover

Gotcha thanks for the feedback. So sounds like F8X rear shock towers are beefier than E9X. I did meet a guy on track with true rear coilovers without reinforcing it on a E92 with aero and had no issues. I might have it reinforced just in case while cage is welded in because why not. I plan on driving the car really hard as well.

[SYT_Shadow]

Originally Posted by Small Yellow

Gotcha thanks for the feedback. So sounds like F8X rear shock towers are beefier than E9X. I did meet a guy on track with true rear coilovers without reinforcing it on a E92 with aero and had no issues. I might have it reinforced just in case while cage is welded in because why not. I plan on driving the car really hard as well.

I'd think the shock towers of the E9X are beefy enough in the rear, especially if it's a temporary solution before you add the cage

[dogbone]

Originally Posted by Small Yellow

Gotcha thanks for the feedback. So sounds like F8X rear shock towers are beefier than E9X. I did meet a guy on track with true rear coilovers without reinforcing it on a E92 with aero and had no issues. I might have it reinforced just in case while cage is welded in because why not. I plan on driving the car really hard as well.

My E90 M3 is a track-only car. Most would agree it's not driven gently.

November 2020 we put MCS 3-way full coilovers on the car. The car is caged, gutted, full aero, supercharged, runs slicks all the time, but the rear shock mounting is not reinforced. Been fine so far, including a few solid off-track excursions. Sometimes I wonder if I missed my calling as a landscaper.....

[admranger]

Originally Posted by dogbone

Sometimes I wonder if I missed my calling as a landscaper.....

I put a John Deere sticker on the back b/c I went off during race weekends so much.

[Kelse92]

Originally Posted by admranger

I put a John Deere sticker on the back b/c I went off during race weekends so much.

We gave a local time trial guy a John Deere plate frame as an award for the most offs last season lol

[dogbone]

haha! That’s some funny stuff!

I should have added the caption “Behold my supercharged mower”!