BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Suspension | Brakes | Chassis
 
ESS Tuning
Post Reply
 
Thread Tools Search this Thread
      12-22-2012, 01:43 PM   #1
Wendall
***Major MammelToe
 
Wendall's Avatar
 
Drives: E92 M3 SG coupe
Join Date: Feb 2012
Location: Orange County, CA

Posts: 1,146
iTrader: (3)

Question about helper springs.

Those of you that have them, do you run a set on front and rears or fronts alone? What length helper spring do you normally use?
__________________
E92 M3 SG DCT - AA Filter, Verstraβe Paddles, ECS SS, MH race stud, Stoptech BBK, MR Exhaust,RE Pulley, BPM Tune,Euro bumper and GTS lip, Euro MDM & DCT, KW CS, Recaro PP, TMS Soild Diff Mounts, MRF solid subframe mounts, GTS aero, RPM track built motor.

Wendall is offline   United_States
0
Reply With Quote
      12-22-2012, 02:03 PM   #2
M3SQRD
Colonel
 
M3SQRD's Avatar
 
Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

Posts: 2,479
iTrader: (2)

Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.
M3SQRD is offline   United_States
0
Reply With Quote
      12-22-2012, 05:53 PM   #3
Richard@M-World
 
Richard@M-World's Avatar
 
Drives: NASA TTA #92 M3
Join Date: May 2011
Location: TX/IL

Posts: 683
iTrader: (0)

OP: is there a specific kit you are looking at?

Quote:
Originally Posted by M3SQRD View Post
Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.
Well said
__________________
Authorized AiM Dealer - Solo/Solo DL | SmartyCam HD | www.m-world.us
Richard@M-World is offline   United_States
0
Reply With Quote
      12-22-2012, 08:30 PM   #4
Wendall
***Major MammelToe
 
Wendall's Avatar
 
Drives: E92 M3 SG coupe
Join Date: Feb 2012
Location: Orange County, CA

Posts: 1,146
iTrader: (3)

Yes, I have been looking at the JRZ RS1 primariy, but I have been also tempted by TCK DA, Ohlin RT, and Nitron R1 (not anymore on since getting info that the rear is not a divorced set). I have seen alot of helper springs used on JRZs but not on many other sets. So im looking at the necessity of them. I have seen the rear kits that allow quick change of the springs.

Quote:
Originally Posted by Richard@M-World View Post
OP: is there a specific kit you are looking at?



Well said
__________________
E92 M3 SG DCT - AA Filter, Verstraβe Paddles, ECS SS, MH race stud, Stoptech BBK, MR Exhaust,RE Pulley, BPM Tune,Euro bumper and GTS lip, Euro MDM & DCT, KW CS, Recaro PP, TMS Soild Diff Mounts, MRF solid subframe mounts, GTS aero, RPM track built motor.

Wendall is offline   United_States
0
Reply With Quote
      12-22-2012, 08:35 PM   #5
Wendall
***Major MammelToe
 
Wendall's Avatar
 
Drives: E92 M3 SG coupe
Join Date: Feb 2012
Location: Orange County, CA

Posts: 1,146
iTrader: (3)

Quote:
Originally Posted by M3SQRD View Post
Helper spring is only used to prevent the main spring from unseating at full droop. Length of helper springs needs to be long enough to keep the main springs seated when the suspension is at full droop.

Tender spring is used to help "push" the main spring down as the suspension starts to droop/extend (i.e., keeps the main spring "preloaded") as well as soften the effective spring rate if it is not fully compressed (two springs in series). Length and rate of tender springs are important.

I use helper springs on the front struts, and no helper or tender springs on the rear height adjusters.
M3SQRD, thanks for all your advice. You are truly a suspension guru. Never seen anyone test so many kits. I think I want your exact set up with 500f/800r rates. Can you tell me all the parts you ordered to complete your set? And do you think I need camber plates if its mostly a street car?
__________________
E92 M3 SG DCT - AA Filter, Verstraβe Paddles, ECS SS, MH race stud, Stoptech BBK, MR Exhaust,RE Pulley, BPM Tune,Euro bumper and GTS lip, Euro MDM & DCT, KW CS, Recaro PP, TMS Soild Diff Mounts, MRF solid subframe mounts, GTS aero, RPM track built motor.

Wendall is offline   United_States
0
Reply With Quote
      12-22-2012, 11:19 PM   #6
M3SQRD
Colonel
 
M3SQRD's Avatar
 
Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

Posts: 2,479
iTrader: (2)

Quote:
Originally Posted by biggynuts01 View Post
M3SQRD, thanks for all your advice. You are truly a suspension guru. Never seen anyone test so many kits. I think I want your exact set up with 500f/800r rates. Can you tell me all the parts you ordered to complete your set? And do you think I need camber plates if its mostly a street car?
I've seen RS1 setups with helper and tender springs.

MCS has released their e9x M3 SA damper!!! This is another great option. Also, it can be upgraded in the future; e.g., you could send the dampers back to MCS and have them converted to 2-way remote-reservoir dampers

PM sent...
M3SQRD is offline   United_States
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 06:22 PM.




m3post
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