BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      03-26-2014, 09:33 AM   #1
SalemChiro
Second Lieutenant
 
Drives: 135i vert
Join Date: May 2012
Location: MA

Posts: 257
iTrader: (0)

135i Convertible Spring Rates

Does anyone know the stock 135i E88 spring rates? I've searched and searched with no luck.


I want Koni yellows with Swift Spec-R springs....No coilovers in my future.

After speaking with Swift, they said it should work....but it will sit slightly lower than the E82.

The E88 is only 300 lbs. more, and the weight distribution is very close so I wouldn't expect the rear to squat much. E82 bias= 52% front 48% rear. E88 bias= 50.3% front, 49.7% rear.

I might be the guinea pig to try this out. I figure if it doesn't work i'll just install the stock springs back in.
SalemChiro is offline  
0
Reply With Quote
      03-26-2014, 09:42 AM   #2
Rob Daman
Second Lieutenant
 
Drives: 2011 135i Vert
Join Date: Mar 2014
Location: OC, CA USA

Posts: 245
iTrader: (0)

do it because i'm curious too. i've read swift springs are really good.
Rob Daman is online now  
0
Reply With Quote
      03-26-2014, 09:49 AM   #3
135iam
Private First Class
 
Drives: 2010 135i 6mt
Join Date: Jan 2014
Location: IL

Posts: 186
iTrader: (2)

I called eibach, H&R, and Swift on this and talked to either tech help or their R&D departments.

The best answer I received was from H&R. A 1.2" rear drop on a coupe is 1.4" on a convert using the following springs (pn. 29187)
The swift rear springs are firmer than H&R so I was expecting similar or less sag with swift compared to H&R.
But I ended up finding a deal on new KWv3's so I didn't order the swifts.

Interested in hearing how this goes for you
135iam is offline  
0
Reply With Quote
      03-26-2014, 10:06 AM   #4
SalemChiro
Second Lieutenant
 
Drives: 135i vert
Join Date: May 2012
Location: MA

Posts: 257
iTrader: (0)

With Swift on the coupe, some report a 1" drop front and rear. I've also read 1" front and .8" rear. If I get an extra .2" all around I'm fine with that.

I'm more concerned pairing the correct spring/shock combination for comfort/performance rather than the overall look of having the car lowered. That's my reasoning behind the Swift springs vs. leaving the stockers in.
SalemChiro is offline  
0
Reply With Quote
      03-26-2014, 10:17 AM   #5
128Convertibleguy
Private First Class
 
Drives: 2010 128 Covertible
Join Date: Jan 2014
Location: Mountains

Posts: 141
iTrader: (0)

Smile

Quote:
Originally Posted by SalemChiro View Post
With Swift on the coupe, some report a 1" drop front and rear. I've also read 1" front and .8" rear. If I get an extra .2" all around I'm fine with that.

I'm more concerned pairing the correct spring/shock combination for comfort/performance rather than the overall look of having the car lowered. That's my reasoning behind the Swift springs vs. leaving the stockers in.
My answer for better comfort/performance with stock ride height will be stock springs and Koni FSDs, and a bigger front antiroll bar for roll control. Less performance than Swift/yellows, but stock ride height and better comfort. It's a good pairing, the FSDs were designed specifically for stock ride height.

Just a personal choice based on priorities, not a case of right/wrong. I'm not big on lowering.
128Convertibleguy is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 02:34 AM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST