INFO: The Ultimate SRT-4 Coilover Thread - SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum
 
 


Go Back   SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum > SRT-4 Technical Discussion > Brakes/Suspension/Chassis

SrtForums.com is the premier Dodge SRT Forum on the internet. Registered Users do not see the above ads.
Closed Thread
 
LinkBack Thread Tools Display Modes
Old 05-15-2007, 12:40 AM   #1 (permalink)
Forum Moderator
 
njshift's Avatar
 
Join Date: Nov 2003
Member Number: 5417
Location: nj
Posts: 3,371
Lifetime Premium Member
INFO: The Ultimate SRT-4 Coilover Thread

Company / Model Spring Rate Additional Info

KW Variant 1 F340 / R170 Non-adjustable damper
KW Variant 2 F340 / R170 Single adjustable damper
KW Variant 3 F340 / R170 Double adjustable damper
KW Clubsport F685 / R400 Double adjustable damper

Tein Basic F280 / R280 Non-adjustable damper
Tein Super Street F280 / R280 Single adjustable damper

Mopar Stage 2 F257 / R171 Non-adjustable damper
Mopar Stage 3 F257 / R171 Single adjustable damper
Mopar Stage 3R Custom* Double adjustable damper

IPP F336 / R224 Revised spring rates, Non-adjustable & single adjustable damper
IPP F450 / R325 Original spring rates, Non-adjustable & single adjustable damper


B&G PS2 F448 / R336 Non-adjustable damper
B&G RS2 F448 / R336 Single adjustable damper

Megan F448 / R336 Single adjustable damper

BC Racing (Bor-Chuann) F336 / R224* Single adjustable damper
BC ER F448 / R336 Double adjustable damper

K-Sport F392 / R280 Single adjustable damper

Progress N/A(?) Release TBA

H&R F230 / R230 Non-adjustable damper

Vogtland F150-250 / R200-300 Progressive spring rates, Non-adjustable damper

Dropzone F400 / R225 Coilover sleeves

Ground Control Custom Spring Rate Coilover sleeves

Nex Racing SS F336 / R250 Revised spring rates, single adjustable damper
Nex Racing SS F450 / R350 Original spring rated, single adjustable damper

Eibach Pro Street F342 / R171 Non-adjustable damper

Hotbits Street Race F280 / R168* Custom applications also available
Hotbits Street Sport F280 / R168

Leda (discontinued Custom Multi-level damper adjustment

Moton Custom Multi-level damper adjustment

Penske Custom Multi-level damper adjustment

Truechoice (Koni) Custom Multi-level damper adjustment

*Custom spring rates also available.


This thread is to provide a basic overview of the available coilovers for the srt-4. Please limit the bs in this sticky. I will keep it up to date with the best of my knowledge. If you have any information regarding new coilovers for our car please feel free to PM me with the information so I can update the list. If you have any relevant educational information feel free to PM me as well. I will continue to update this list when necessary. Thank you for all your help.

Greg
__________________

Last edited by njshift; 05-24-2010 at 09:02 PM.
njshift is offline  
Sponsored Links
Advertisement
 
Old 05-15-2007, 06:35 AM   #2 (permalink)
SRTforums Admin
 
stowaway's Avatar
 
Join Date: Aug 2003
Member Number: 3286
Location: Outer Banks, NC
Posts: 35,877
Lifetime Premium Member
Default

holy hell, nice list. I don't want to know how bad some of those must ride with those spring rates.
__________________
stowaway is offline  
Old 05-16-2007, 12:39 AM   #3 (permalink)
SRTforums Member
 
BlackOhFour's Avatar
 
Join Date: Apr 2005
Member Number: 26183
Location: Pittsburgh PA
Posts: 864
Default

Quote: Originally Posted by stowaway
holy hell, nice list. I don't want to know how bad some of those must ride with those spring rates.

No, you dont. PA roads suck, I have come to the conclusion you can't have a STOCK cadi in this state and have a good ride.

My megans are rough, but 1000 times better then my goldlines ever were
__________________
Pittsburgh Crew - Join up: http://www.pittspeed.com

Quote: Originally Posted by RedLineGSR94
you managed to get 8 DSMs together in one place??? did you own a junkyard???

BlackOhFour is offline  
Old 05-16-2007, 12:53 AM   #4 (permalink)
SRTforums Member
 
Satellite's Avatar
 
Join Date: May 2004
Member Number: 11813
Location: Omaha, NE
Posts: 4,134
Default

For the suspension newbies...what's a "stiffer" spring rate versus a "more forgiving" spring rate. Or is that even how you can compare them?
Satellite is offline  
Old 05-16-2007, 06:18 AM   #5 (permalink)
SRTforums Admin
 
stowaway's Avatar
 
Join Date: Aug 2003
Member Number: 3286
Location: Outer Banks, NC
Posts: 35,877
Lifetime Premium Member
Default

spring rates are measured in weight required to compress the spring x amount. in the US it is almost always lbs per inch. So for the Tein's they require 280lbs of weight to compress the spring 1". The stiffer the spring rate, the more force is required to compress it. This means that in a car driving down the road and hitting a bump, a softer spring will be able to compress more and soak up the impact much better than a stiff spring which may only compress an inch or so. Since the spring can't soak up the impact it is transferred to the chassis and now you feel the bump. Shock valving also plays a roll in all of this, but getting into the forces per distance per timeframe is more than most want to get into.
__________________
stowaway is offline  
Old 05-16-2007, 10:15 AM   #6 (permalink)
Premium Member (Lifetime)
 
1badsrt-4's Avatar
 
Join Date: Dec 2004
Member Number: 21276
Location: internet
Posts: 10,650
Lifetime Premium Member
Default

Great post.....it is now stuck
__________________
11.34 @ 128.33 mph. 57 trim, Stock motor, head, cams and ecu
1badsrt-4 is offline  
Old 05-16-2007, 03:10 PM   #7 (permalink)
SRTforums Member
 
Got_SRT-4?'s Avatar
 
Join Date: Nov 2003
Member Number: 5759
Location: Greensboro, NC
Posts: 218
Default

The BC racing coilovers are about the stiffest ones out there and everyone who has them says how they are like the stock ride on the lowest setting. They must have good valving or everyone who has them isn't beeing truthful.
Got_SRT-4? is offline  
Old 05-16-2007, 04:01 PM   #8 (permalink)
Forum Moderator
 
njshift's Avatar
 
Join Date: Nov 2003
Member Number: 5417
Location: nj
Posts: 3,371
Lifetime Premium Member
Default

This thread is to provide a basic overview of the available coilovers for the srt-4. Please limit the bs in this sticky. I will keep it up to date with the best of my knowledge. If you have any information regarding new coilovers for our car please feel free to post the information so I can update the list. If you have any relevant educational information feel free to post that as well. Any other questions not pertaining to the topic of this thread should be posted elsewhere. Thank you for all your help.

Greg
__________________
njshift is offline  
Old 06-04-2007, 06:29 AM   #9 (permalink)
SRTforums Member
 
dF 240eS X's Avatar
 
Join Date: Nov 2006
Member Number: 48488
Location: Maine
Posts: 163
Default

Hows about another column for the MSRP of each of these, I think that would make for a nicer comparison if people are going to use this thread to pick which coilovers to buy.
__________________
03' SSM Acura RSX Type-S
dF 240eS X is offline  
Old 06-04-2007, 06:55 AM   #10 (permalink)
SRTforums Member
 
bpsrt4's Avatar
 
Join Date: Apr 2006
Member Number: 40796
Location: homeless :(
Posts: 10,465
Default

As far as spring rates go, I switched from non-adjustable IPP's w/ old spring rates to the K-sports. The difference was night and day. I'm not sure whether or this is due to the dampening, the pillow ball mounts, or could this be the spring rates. it is still stiff, but seems smoother
__________________
......
bpsrt4 is offline  
Old 06-04-2007, 07:04 AM   #11 (permalink)
SRTforums Admin
 
stowaway's Avatar
 
Join Date: Aug 2003
Member Number: 3286
Location: Outer Banks, NC
Posts: 35,877
Lifetime Premium Member
Default

the mount won't do anything to the ride. the spring rate likely has the biggest affect.
__________________
stowaway is offline  
Old 06-04-2007, 08:48 AM   #12 (permalink)
SRTforums Member
 
bpsrt4's Avatar
 
Join Date: Apr 2006
Member Number: 40796
Location: homeless :(
Posts: 10,465
Default

Thats what I was thinking, good info by the way

Thanks
__________________
......
bpsrt4 is offline  
Old 06-04-2007, 01:23 PM   #13 (permalink)
Forum Moderator
 
njshift's Avatar
 
Join Date: Nov 2003
Member Number: 5417
Location: nj
Posts: 3,371
Lifetime Premium Member
Default

Quote: Originally Posted by dF 240eS X
Hows about another column for the MSRP of each of these, I think that would make for a nicer comparison if people are going to use this thread to pick which coilovers to buy.

I was originally going to post prices of the coilovers listed. However I opted not do so mainly because MSRP is not a good reflection of what a consumer would pay. There is a considerable amount of price fluctuation recently and honestly it?s serious work to keep up to date with the most current price. I would rather an interested buyer do a quick search to get the most current price available rather then getting a skewed idea of price from this thread. I'm more concerned on posting hard facts rather then estimates. Between group buys, ebay, and the for sale section, price is not always invariable.
__________________
njshift is offline  
Old 06-04-2007, 01:28 PM   #14 (permalink)
Forum Moderator
 
njshift's Avatar
 
Join Date: Nov 2003
Member Number: 5417
Location: nj
Posts: 3,371
Lifetime Premium Member
Default

Quote: Originally Posted by bpsrt4
As far as spring rates go, I switched from non-adjustable IPP's w/ old spring rates to the K-sports. The difference was night and day. I'm not sure whether or this is due to the dampening, the pillow ball mounts, or could this be the spring rates. it is still stiff, but seems smoother

Pillow ball mounts / camber plates will actually transmit more road vibration.

Let's try to keep the comments to a minimum. Thanks.
__________________
njshift is offline  
Old 06-17-2007, 10:09 PM   #15 (permalink)
SRTforums Member
 
DaFlyyOnDaWall's Avatar
 
Join Date: Aug 2004
Member Number: 14318
Location: CapitolCity, NJ
Posts: 489
Default

any ideas on when IPP changed their spring rates? i have their stage 2 coilovers and am looking into changing the springs on them.
DaFlyyOnDaWall is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 10:22 PM.



(C) SRTforums.com

Search Engine Friendly URLs by vBSEO 3.3.2