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      05-07-2019, 03:15 PM   #45
lax01
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Quote:
Originally Posted by lax01 View Post
Do you happen to know what those are in comparison to the track settings? Want to try the track settings this weekend
Never mind - just found the manual, it looks like default is:
Axle Rebound Compression
Front Axle 9 Clicks open 6 Clicks open
Rear Axle 12 Clicks open 6 Clicks open

You can find the manual here: https://f87.bimmerpost.com/forums/sh....php?t=1359206
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      05-08-2019, 01:50 AM   #46
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The Track settings are in the post on the previous page, with the BMW guide that gives them here:
https://f87.bimmerpost.com/forums/sh....php?t=1589619
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      05-12-2019, 01:36 PM   #47
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How hard was it to remove the rear spring perch. Do you have to drop the lower arm?
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      05-12-2019, 03:10 PM   #48
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Before, or after fitting the MPS?
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      05-12-2019, 06:22 PM   #49
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      05-13-2019, 12:30 PM   #50
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The MPS spring is shorter than stock but not that short (and there are no helper springs). So a choice of dropping the lower arm or just unbolting the damper. If going for the latter route, unbolt the top to save having to replace the lower bolt - its stretch to torque (100Nm +90 degrees).

The ARB will fight back however unless you have both rear wheels off the ground.
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      10-05-2020, 12:36 AM   #51
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I am currently on the stock settings and here in Connecticut it is pretty fine. I took a trip to Jersey recently and it made me feel like I should look into softening it up a little to say the least.

I was wondering what settings people (maybe around the NY/CT area) could suggest for a comprisable comfort/spirited street setup? I was thinking just soften the rebound & compression 3-4 clicks from the factory settings? I don't track my car either, but as far as putting everything on full soft seems you will start to have traction and bouncing issues in my mind.
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      10-05-2020, 12:51 AM   #52
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Quote:
Originally Posted by Badmon View Post
I am currently on the stock settings and here in Connecticut it is pretty fine. I took a trip to Jersey recently and it made me feel like I should look into softening it up a little to say the least.

I was wondering what settings people (maybe around the NY/CT area) could suggest for a comprisable comfort/spirited street setup? I was thinking just soften the rebound & compression 3-4 clicks from the factory settings? I don't track my car either, but as far as putting everything on full soft seems you will start to have traction and bouncing issues in my mind.
Just for interest, I backed all my setting off 2 clicks and went for a drive, then returned them to default and retraced my steps. Seemed that where the ride was good, it was still good, just a tiny little bit softer. But over nasty bumps, it really wasn’t discernibly different, and the steering response wasn’t as nice. It seemed the difference in front softness was greater also.

Might try -4 next....
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      10-06-2020, 07:17 AM   #53
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The V3 and MPS are valved such that high frequency compression damping is consistent regardless of the setting applied to the low frequency compression damping with the adjuster. So this may be what you're feeling.
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      10-07-2020, 12:25 AM   #54
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The high speed compression and rebound damper force does change slightly as a function of the low speed adjustment. How much of that we can feel on the road, however, is probably minimal.

Here is a graph that shows the V3 response. There is another thread somewhere that graphed the MPS response, and it was different than the V3, particularly on the rebound side.

https://www.kwsuspensions.com/produc...overs/variant3
Name:  KWV3.JPG
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Size:  75.0 KB


For me, the biggest differences in ride comfort came from adjusting the rebound. The front is easiest to change, but my perception is the rear a bigger impact. I think its also worth mentioning that the tire and wheel selection impacts the felt harshness over imperfections in the road. (for example, switching tires from MPSS to CUP 2)

If the rebound is underdamped, then the chassis will continue to oscillate after hitting an unsettling bump. If overdamped, then it feels more harsh, especially when hitting bumps in succession like on a bumpy highway. I think the sweet spot can be found by driving the same bit of road, hitting the same bumps and finding an adjustment that allows the suspension to compress and then return fully without oscillating.

I think its all personnel preference/tolerance and I just accepted the compromises of having a sportier set up. I do think MPS can be more comfortable around town than the stock suspension, but more uncomfortable on the highway.

Last edited by KHAP13; 10-07-2020 at 12:59 AM..
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      10-07-2020, 12:50 AM   #55
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Here is a description of what range of shaft velocities contribute to different feel / feedback. So if you can obtain the Shock Dynamometer results, you can get a general idea of how different settings will change characteristics of handling and feedback.

Name:  ShockDynamometer.JPG
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Size:  52.3 KB

Source http://edge.rit.edu/edge/P16221/publ...yno_graphs.pdf
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      10-07-2020, 01:58 AM   #56
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Quote:
Originally Posted by KHAP13 View Post
.

Here is a graph that shows the V3 response. There is another thread somewhere that graphed the MPS response, and it was different than the V3, particularly on the rebound side.
Jetbill's thread is here:

https://f87.bimmerpost.com/forums/sh...highlight=dyno
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      10-28-2020, 02:39 AM   #57
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Having spent some time enjoying the factory settings, then driving our F20 hatch for a week which is obviously way softer, I decided to try for a touch more comfort. Reducing rebound 3 clicks and compression 2 clicks all ‘round has proved to be really impressive. Just gives it a moment longer to react so is less strict and breathes more, being more supple and absorbent. You do notice the drop in steering sharpness and the increase in roll but it’s still way more controlled than stock and even more comfortable.
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      03-23-2021, 03:15 AM   #58
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I just received the M performance coilovers and I want to confirm whether they currently have the compression and rebound settings as specified by BMW.

Do I understand it correctly that in order to set the compression/rebound that I have to turn the wheels to the maximum (hardest) + position and from there dial it 9 clicks back, if I want to have the rebound "9 clicks open"?

TIA!
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      03-23-2021, 02:41 PM   #59
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Quote:
Originally Posted by squixs View Post
I just received the M performance coilovers and I want to confirm whether they currently have the compression and rebound settings as specified by BMW.

Do I understand it correctly that in order to set the compression/rebound that I have to turn the wheels to the maximum (hardest) + position and from there dial it 9 clicks back, if I want to have the rebound "9 clicks open"?

TIA!
https://f87.bimmerpost.com/forums/sh...9&postcount=45
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      03-23-2021, 08:09 PM   #60
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Quote:
Originally Posted by squixs View Post
I just received the M performance coilovers and I want to confirm whether they currently have the compression and rebound settings as specified by BMW.

Do I understand it correctly that in order to set the compression/rebound that I have to turn the wheels to the maximum (hardest) + position and from there dial it 9 clicks back, if I want to have the rebound "9 clicks open"?

TIA!
Yes correct, my m performance coilovers came with the street settings pre-set so there is no need to adjust.

and yes, from the hardest setting and count the clicks.

From the manual

"The adjustment is made from the closed position (max. hardness). The closed position is reached when the
adjustment wheel (1) has been turned as far as possible in the hard direction
(+) (number "0" on the wheel). The effective adjustment range is 0-16 clicks."
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      08-31-2021, 01:42 AM   #61
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Just wanted to throw out there that I'm running the following on the street:
F C8/R13
R C8/R16

I've never tracked my M2 ZL9 even though I intended to. If I were going to track it though, then I'd run KW's recommended settings:
F C4/R7
R C4/R10
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      08-31-2021, 06:08 AM   #62
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Sorry slight thread highjack as don't have MPS but have B16 Litchfield spec.

What's Khap13 describes is what I get on a certain on ramp near me that is curved with two expansion joint lines.
Since getting coilovers the front of the car oscilates before settling.

I feel suspension compress then the car feels like it goes down then up again then settles.

Should I increase the front from 7 to 8 maybe?

Currently at 7 front 4 rear. Stock was 5 front 2 rear (way too soft for me)

Cheers
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      09-02-2021, 03:33 AM   #63
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Quote:
Originally Posted by 3t3p View Post
Sorry slight thread highjack as don't have MPS but have B16 Litchfield spec.

What's Khap13 describes is what I get on a certain on ramp near me that is curved with two expansion joint lines.
Since getting coilovers the front of the car oscilates before settling.

I feel suspension compress then the car feels like it goes down then up again then settles.

Should I increase the front from 7 to 8 maybe?

Currently at 7 front 4 rear. Stock was 5 front 2 rear (way too soft for me)

Cheers
Was the ramp behaviour you describe worse or better before you went from 5 ->7 upfront ?

If unsure, I'd advise going back to 5 upfront 1st and assess (compared to current setting) before going firmer, 7 -> 8.
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      09-09-2021, 01:47 PM   #64
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Quote:
Originally Posted by Bee Pee View Post
Was the ramp behaviour you describe worse or better before you went from 5 ->7 upfront ?

If unsure, I'd advise going back to 5 upfront 1st and assess (compared to current setting) before going firmer, 7 -> 8.
Not been on here a while.

I'm not sure BP it may be worse actually. Stock I never noticed the front of the car doing anything like this, the rear had a momentary wiggle (slight) but that was it.

With Litchfield it's like shock of bump, car down at front, car up again at front.

Tbh was going to put it on 8 up front for Millbrook on Saturday?

The back is now very good with 4.

I need someone like centre gravity to sort it but don't have time or funds right now
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      09-10-2021, 09:41 AM   #65
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Quote:
Originally Posted by 3t3p View Post
Quote:
Originally Posted by Bee Pee View Post
Was the ramp behaviour you describe worse or better before you went from 5 ->7 upfront ?

If unsure, I'd advise going back to 5 upfront 1st and assess (compared to current setting) before going firmer, 7 -> 8.
Not been on here a while.

I'm not sure BP it may be worse actually. Stock I never noticed the front of the car doing anything like this, the rear had a momentary wiggle (slight) but that was it.

With Litchfield it's like shock of bump, car down at front, car up again at front.

Tbh was going to put it on 8 up front for Millbrook on Saturday?

The back is now very good with 4.

I need someone like centre gravity to sort it but don't have time or funds right now
Reads like yr front suspension may be too firm and so front wheels lose ground contact.

Have tried say a softer setting up front ie 4 ?
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      09-12-2021, 02:53 PM   #66
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I don't think anything like losing contact. It feels like a weight transfer thing. I'm replying to my own thread now so as to not further hijack this one.
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