Reference: Honda Spring Rates

[Eran]

Here is a compiled list of spring rates for many different aftermarket (and OEM) springs for Civics and Integras. I am still working on my 88-91, 92-95, and 01+ (Non-EP3) listings, and they will be added to this in due time. Sorry, I don't yet have the spring rates for the factory EP3. If anyone has more information, or corrections, let me know so I can add them. A big thanks to JDMFreak, EXavier, and PahLok from HT.

P = Progressive
L = Linear

For 96-00 Civics (EJ, EK and EM1 chassis codes)

96-00 EX factory			165F/80R (P/P)
99-00 Si (EM1) factory			201F/99.8R (P/P)
CTR factory				240/240 (L/P)
APEX'i WS				447F/178R
Eibach ProKit				290F/190R (P/P)
Eibach Sportline			310F/275R (P/P)
Gold-line GL 2.5" drop			320/190 (P/P)
Gold-line GPS 1.25" drop		275/160 (P/P)
Ground Control Coilover			380F/280R (P/P)*
H&R OE					280F/190R (P/P)
H&R Sport				330F/280R (P/P)
JIC FLT-A2s (USDM)			504F/336R (L/L)
Koni RSK Suspension kit			154-205/270 (P/L)
Neuspeed SofSports			260F/150R (P/P)
Neuspeed Sport				280F/180R (P/P)
Neuspeed Race				485F/395R
Omni-Power Adjustable Sleeve Coilover	448F/336R (L/L)*
Omni-Power Street Coilovers		448F/336R (L/L)*
Omni-Power Sport Coilovers		539F/448R (L/L)*
Omni-Power Drag Coilover		810F/810R (L/L)*
Omni-Power 6-Way Damping Coilovers	539/448/336 (L)*
Progress Coilovers			350F/250R (P/P)
Progress Lowering Springs		320F/200R (P/P)
SkunkWerks Coilovers (old)		400F/300R (L/L)
Skunk2 Coilovers (new)			500F/400r (L/L)
Sparco					needed
Spoon Full Coilovers			300/240
SSR Cup					392/280
SSR S1					448/448
Suspension Techniques			10-15% more then stock (P/P)
Tanabe DF-210				10-15% more then stock
Tanabe NF-210				5-10% more then stock
Tein HT					1119F/448R (L/L)
Tein HG					365F/129-196R (L/P)
Tein SS					448F/224R
Tein Flex				504F/280R
Tein RA/RE/RS				783F/559R (L/L)
Tein S. Tech				235F/140R
Tokico Illumina Kit			250/123 (P/P)

For 02-05 Civic Si (EP3)

Eibach Pro-Kit				15-20% stiffer then stock
Eibach Sportlines			20-25% stiffer then stock
H&R Sport				25-30% more then stock
Omni-Power Street Coilovers		448F/336R (L/L)*
Omni-Power Sport Coilovers		539F/448R (L/L)*
Omni-Power 6-Way Damping Coilovers	539/448/336 (L)*
Progress				280F/500R
Sprint					20-25% more then stock
Tein Flex				448F/559R
Tein SS					336F/448R
Tein S. Tech				157F/291R

For 94-01 DC Integra

97, 00-01 ITR factory			250F/250R (L/P)
GS-R factory				200F/95R (P/P)
OEM 60x343mm				252F/140R (L/P)
Comptech Sport				335F/210R (L/P)
Eibach Pro Kit				288F/213R (P/P)
Eibach Sport Line			325F/241R (P/P)
Endless Zeal Function B6 Hard		672F/448R (L/L)
Endless Zeal Function B6 Street		560F/336R (L/L)
Ground Control Coilovers		380F/250R (L/L)*
H&R OE Sport				302F/168R
H&R Race				460F/350R (L/L)
H&R Sport				276F/276R (L/P)
HKS SF5					398F/291R (L/L)
KW variant 1				needed (L/L)
KW variant 2				needed (L/L)
KW variant 3				needed (L/L)
Mugen 5 Adjustment Kit			381F/252R (L/L)
Neuspeed Race				455F/360R (L/L)
Neuspeed Soft Sport			250F/185R (P/P)
Neuspeed Sport				250F/185R (P/P)
Omni-Power Adjustable Sleeve Coilover	448F/336R (L/L)*
Omni-Power Sport Coilovers		539F/448R (L/L)*
Omni-Power Street Coilovers		448F/336R (L/L)*
Omni-Power Drag Coilover		810F/810R (L/L)*
Omni-Power 6-Way Damping Coilovers	539/448/336 (L)*
RS*R Race				279F/268R (L/L)
RS*R SUS				242F/173R (P/P)
SkunkWerks Coilovers (old)		500F/400R
Skunk2 Coilovers (new)			500F/400R (L/L)
Spoon Progressive			358F/303R (P/P)
Spoon Stright Spring 60x200mm		448F/448R (L/L)
Swift Sport Mach Luxury			336F/196R (L/L)
Tanabe DF210				241F/201R
Tanabe GF210				302F/235R
Tanabe NF210				274F/201R
Tein High Tech				296F/257R (P/P)
Tein S-Tech				335F/274R (P/P)

* = Can custom make coil-overs with superior spring rates (0.25lb/ft increases)

 

[Going-West]

what's the smell?

smells.............sticky.

good post jason

 

[io_303]

Wow you an NOFX have given some good info lately....Good work

 

[Eran]

thanks for the sticky

 

[JoeB]

nice work compiling

 

[defvayne]

so what springs would be best for 96-00 hatchback since they are lighter in the rear?

 

[defvayne]

so what springs would be best for 96-00 hatchback since they are lighter in the rear?

bump....need this answer quick.

 

[c_diddy]

what's the smell?

smells.............sticky.

good post jason

i second that. that's some good stuff to know.

 

[CivicEX13]

good info man w00t!

 

[nighthawk]

great post. now I just need I little help with reading this
Is it better to have P/P springs? What does this numbers actually mean? I guess the larger are numbers, the lower car is, right? And probably stiffer right?

I would appreciate some assistance

 

[Eran]

great post. now I just need I little help with reading this
Is it better to have P/P springs? What does this numbers actually mean? I guess the larger are numbers, the lower car is, right? And probably stiffer right?

I would appreciate some assistance

None of the numbers up there have to do with ride height

Here's how spring rates work:

Say you have a front rate of 200lb/in. (ie, 200F/xxxR). That means that each front spring takes 200lbs of pressure to compress one inch. The higher your spring rate, the more force it takes to compress it, the stiffer your ride.

Linear vs Progressive:

Linear springs have the same rate from top to bottom. No matter where pressure is applied, it's going to take the same ammount of pressure to compress one inch. Progressive springs use "inactive" coils to have two completely separate spring rates. The bottom portion of the spring will take less pressure to compress, thus giving a softer, smoother ride, where the top portion will take more pressure to compress, thus improving handling in more agressive cornering.

 

[ALEXSAN]

hi can you help? you have a list for honda civic eg 92-95 hatcback I HAVE A HONDA CIVIC SI HACTHBACK WITH 1600 DOHC ENGINE MODEL 1993 )AND I WANT TO BUY A LOWERING SPRING CODE 519-05-1480 DROP MY CAR 2.5" FRONT A 2.25" REAR

I USE MY CAR FOR STREET NO ON RACE TRACK

THEN.. MY CAR WITH YOUR PRODUCT WILL BE JUMPING WITH OEM SHOCKS?

AND WOULD I NEED NEW SHOCKS?

FOR ME IS IMPORTANT TO KNOW IF MY CAR WITH YOURS LOWERING SPRINGS WILL BE HAVE A COMFORT AND HANDLING ACCEPTABLE ON STREET

 

[NOFX]

He's not selling these springs. Make your own thread and you're more likely to get good answers.

 

[BlackHopeDC5]

omg this is useful.... i never saw this before.. good s**t

 

[NOFX]

Jason made lots of useful threads.

 

[Matt.]

Jason made lots of useful threads.

Indeed, I never know why he's banned quite a bit.

 

[NOFX]

Indeed, I never know why he's banned quite a bit.

Well, you can still find him on H-T at least. That is... if you want to brave it.

 

[sneakerpimp120]

so the higher the number stiffer they are ? or no

 

[sneakerpimp120]

Tein S. Tech 235F/140R are they progressive or linear?

 

[99ExDriver]

thank for the information, I was looking for eibach spring rates for weeks.