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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Springs to match the Koni Yellow's?



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      08-09-2016, 08:33 AM   #1
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Springs to match the Koni Yellow's?

I am considering changing out the Eibach brings I have paired with my new Koni Yellow shocks. The Eibach springs have about 140,000kms on them and came from my previous B12 setup kit.

Are there any springs which might be better paired with the Koni's? H & R or Swift, etc?

Thanks,
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      08-09-2016, 10:10 AM   #2
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I just put on Swift Spec-R springs with my Koni Yellows this weekend. Still haven't had a chance to really drive it hard but the drop looks nice and the ride quality is great despite being firmer than the stock setup
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      11-06-2016, 12:14 AM   #3
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Quote:
Originally Posted by madmantwo View Post
I just put on Swift Spec-R springs with my Koni Yellows this weekend. Still haven't had a chance to really drive it hard but the drop looks nice and the ride quality is great despite being firmer than the stock setup
Just wanted to circle back and see how the Koni/Swift setup has been working out for you.
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      11-06-2016, 01:48 AM   #4
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Overall, I'm still just as happy with how they feel and perform. My main complaint has been the drop in the rear. You'll see on a couple other threads that people have been a little concerned with how low the rear settles. I ended up having to cut down an e36 10mm spring pad and place it on top of the spring cup, now it is almost perfect. I can upload some pictures tomorrow if you'd like
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      11-12-2016, 12:20 AM   #5
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I have the yellow BMWPS springs (and bumpstops) paired with Koni yellows and like them a lot.
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      11-12-2016, 12:49 AM   #6
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Quote:
Originally Posted by DrRobert View Post
I have the yellow BMWPS springs (and bumpstops) paired with Koni yellows and like them a lot.
Would you happen to have the part number for those?

Thanks!
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      11-12-2016, 01:12 AM   #7
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Quote:
Originally Posted by D's Bimmer View Post
Would you happen to have the part number for those?

Thanks!
front springs: 31336788893
rear springs: 33536788901

bumpstops: 33536788905, 31336789540 (not sure which are front and which are rear)
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      11-12-2016, 01:42 AM   #8
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BTW, I also recommend the Dinan rear upper shock mounts with the Koni yellows. They made a noticeable decrease in rear bounce when I installed them.
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      11-12-2016, 04:52 AM   #9
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Quote:
Originally Posted by madmantwo
Overall, I'm still just as happy with how they feel and perform. My main complaint has been the drop in the rear. You'll see on a couple other threads that people have been a little concerned with how low the rear settles. I ended up having to cut down an e36 10mm spring pad and place it on top of the spring cup, now it is almost perfect. I can upload some pictures tomorrow if you'd like
just installed today the bmw rough road kit part number 33536769473 (you need two one for each side)

basically a spring spacer that raises the rear of the car about 0.5". was getting tired of my exhaust rubbing on the ground.

and also a tiny bit of scrubbing see the photo attached. yes that's my fuel filler neck. running stock wheels. I'm in a 1 series so it could be an issue isolated to the 1 series.
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      11-12-2016, 12:22 PM   #10
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I am thinking that these BMW Performance springs might be better for me as a spirited Daily Driver. The Eibach's I have matched with the Koni's at the moment are the Euro Spec Linear version that came with my B12 kit. I called Eibach and they advised that switching to their progressive version would improve my ride quality and still enhance the handling over stock.

Guess I will see what the price point difference is between the Eibach Pro Kit springs and the BMW Performance Springs. Will definitely look at the Dinan Rear Upper mounts as well.

Hoping this will get me where I want to be in terms of ride comfort, performance and aesthetics.
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      11-13-2016, 11:10 AM   #11
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I have matched my Koni yellow with BMWPS yellow springs with Monroe mounts. I really like how the car rides and handles. Better than Koni yellow with BMW sport sprigs that I had on originally.
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      11-13-2016, 11:21 AM   #12
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Quote:
Originally Posted by feuer View Post
I have matched my Koni yellow with BMWPS yellow springs with Monroe mounts. I really like how the car rides and handles. Better than Koni yellow with BMW sport sprigs that I had on originally.
Would you have any pictures of the drop? I think the drop would be slightly more conservative that the Eibach's which I would actually be fine with. How would you compare the smoothness of the ride compared to stock? I am just finding this Koni/Eibach setup up to be to harsh at times.

I was a passenger recently in a car that had the Dinan custom valued Koni's with the Dinan Springs and it was truly amazing. One of the finest sport suspension rides I have experienced. The challenge is I am trying not to spend that kind of money if possible.

I am hoping that the BMW Performance Springs are an optimal pairing to the standard valving on the Koni Yellows.

Thanks

Last edited by D's Bimmer; 11-13-2016 at 12:11 PM.
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      11-13-2016, 12:09 PM   #13
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Quote:
Originally Posted by D's Bimmer View Post
Would you have any pictures of the drop? I think the drop would be slightly more conservative that the Eibach's which I would actually be fine with.

Thanks
http://www.e90post.com/forums/showpo...&postcount=232
My car doesn't run smoothly at all. None of the e9x do, unless on 16" wheels and none sport suspension.
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      11-13-2016, 12:30 PM   #14
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Quote:
Originally Posted by D's Bimmer View Post
Would you have any pictures of the drop?
Thanks
Here's the difference on OEM rims. As you can see there is a 1/2" drop in front and rear from sport spring ride height:






Here's with my HRE wheels:
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      11-13-2016, 12:42 PM   #15
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Quote:
Originally Posted by DrRobert View Post
Here's the difference on OEM rims. As you can see there is a 1/2" drop in front and rear from sport spring ride height:






Here's with my HRE wheels:

Thanks for the pictures. Are those amazing HRE wheels 18" or 19"? Great looking ride!!!
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      11-13-2016, 01:17 PM   #16
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Why have you switched from bilstien from your b12 kit again?
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      11-13-2016, 01:39 PM   #17
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Quote:
Originally Posted by Black n54is View Post
Why have you switched from bilstien from your b12 kit again?
I switched because the front right damper was damaged in a spin out. I went with koni'/ because a set was available at a great price. So I am basically trying to best pair up the best springs with these standard Koni's.
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      11-13-2016, 01:43 PM   #18
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Quote:
Originally Posted by D's Bimmer View Post
Thanks for the pictures. Are those amazing HRE wheels 18" or 19"? Great looking ride!!!
Those are HRE 18" FF15 Flow Forms.
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      11-13-2016, 02:53 PM   #19
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Quote:
Originally Posted by D's Bimmer View Post
I switched because the front right damper was damaged in a spin out. I went with koni'/ because a set was available at a great price. So I am basically trying to best pair up the best springs with these standard Koni's.
Oh gotcha
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      11-17-2016, 10:34 AM   #20
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Quote:
Originally Posted by DrRobert View Post
Those are HRE 18" FF15 Flow Forms.
FYI I just bent one of those HRE FF15s the other day on a pothole, and found out that 2 of the other 3 wheels were also bent a little bit too. I'm switching to forged wheels, and can no longer recommend the flow forms.
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      11-17-2016, 04:32 PM   #21
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Quote:
Originally Posted by feuer View Post
I have matched my Koni yellow with BMWPS yellow springs with Monroe mounts. I really like how the car rides and handles. Better than Koni yellow with BMW sport sprigs that I had on originally.
Do you know what the spring rates are for yours? I'm thinking a bit more aggressive than the b12 kit eibachs which are basically like stock at ~150lb F/~450lb R..
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      11-17-2016, 04:52 PM   #22
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Quote:
Originally Posted by Black n54is View Post
Do you know what the spring rates are for yours? I'm thinking a bit more aggressive than the b12 kit eibachs which are basically like stock at ~150lb F/~450lb R..
http://www.e90post.com/forums/showthread.php?t=235797
Front: 195 lb/in
Rear: 505 lb/in
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