Stock/Lowering Spring Rate Compilation

Ma70.Ent

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#1
Here's a list of lowering spring rates that have been found over the net. I recently found out the rates of the Stock MKIII Pre-89s and the Whiteline Springs, so I've added them here along with the other list. I'll try to find out the spring rates from various companies in the future. I got the Whiteline Spring Rates from an email from a Whiteline Customer Service person, so it's reputable. And as for the Stock MKIII Pre-89s, they seem plausible as a site said they are 16% softer than the Stock MKIII 89+. Before anyone says Tanabes are linear, they are not. While I have no personal experience with them, I emailed Tanabe and a rep said they are progressive in some areas, and linear in others. This means its progressive since its not one set spring rate, as far as I can tell.

There are some debate about the stock MK3 springs. Some manufacturers who give out rates say the rates are 15-30% more than stock which would actually lead the 89+ springs to be around 390 lb/in in the front and the 87 springs to be around 330 lb/in in the front. But most really wouldn't care about the stock spring rates because it's still 4x4 height and stuff.

* Stock MKIII Pre-89
* Front: 461 lb/in
* Rear: 180 lb/in
* Drop: It's higher than the Stock MKIII 89+
* Type: Linear

* Stock MKIII 89+
* Front: 461 lb/in
* Rear: 215 lb/in
* Drop: 0
* Type: Linear

* Stock MKIV
* Front: 430 lb/in
* Rear: 219 lb/in
* Drop: 0
* Type: Linear
* Notes: Only the front MKIV Springs will fit our cars.

* Eibach
* Front: 343-628 lb/in
* Rear: 126-257 lb/in
* Drop: 1.3" - 1.0"
* Type: Progressive

* Suspension Techniques
* Front: 442 lb/in
* Rear: 147-175 lb/in
* Drop: 1.3"
* Type: Linear Front, Progressive Rear

* H&R
* Front: 575 lb/in max
* Rear: 285 lb/in
* Drop: 2"
* Type: Progressive

* Tanabe
* Front: 442 lb/in
* Rear: 207 lb/in
* Drop: 1.1" - 0.6"
* Type: Progressive

* R*SR Race
* Front: 677 lb/in
* Rear: 335 lb/in
* Drop: 1.4" - 0.8"
* Type: Linear

* R*SR Sport
* Front: 503 lb/in
* Rear: 262 lb/in
* Drop: 1.2" - 0.8"
* Type: Linear

* Tokico
* Front: 395 lb/in
* Rear: 198 lb/in
* Drop: 1"
* Type: Linear

* Whiteline
* Front: 381 lb/in
* Rear: 218 lb/in
* Drop: 1.0
* Type: Linear

* Intrax
* Front: 700 lb/in max
* Rear: 220 lb/in
* Drop: 1.6" - 1.3"
* Type: Progressive

* B+G Suspension
* Front: ?? lb/in
* Rear: ?? lb/in
* Drop: 1.3"
* Type: Progressive
* Notes: Said to have similar spring rates to Eibachs.

* Apexi
* Front: 626 lb/in
* Rear: 240 lb/in
* Drop: 1.3"
* Type: Progressive

* Aerospeed
* Front: ?? lb/in
* Rear: ?? lb/in
* Drop: ?
* Type: ?
 

toy fanatic78

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#3
Re: Lowering Spring - Spring Rate Compilation

How would you test/find out spring rate for springs that aren't listed?
 

toy fanatic78

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#5
Re: Lowering Spring - Spring Rate Compilation

I was wondering about the TRD's I have.AFAIK there are at least 2 different rates for the MK3 springs they made too.
I think they are different than the re-badged Enkei's too,'cause they dropped the car almost 3" from stock
 

Ma70.Ent

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#6
Re: Lowering Spring - Spring Rate Compilation

For the spring rates listed that vary, when/why do they vary?
If I understand your question correctly, some are progressive, some are not...which causes them to have a spring rate "range".

How about the JDM TTR Spring rates?
Unfortunately I do not know. They're probably stiffer than the stock springs since they're paired up with Bilsteins.
 

Piratetip

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#7
Re: Lowering Spring - Spring Rate Compilation

Thanks MA70!

I have been trying to find the rates of the whitelines for awhile.
You must have found someone intelligent there, when I contacted them, they had no idea.
 

Ma70.Ent

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#8
Re: Lowering Spring - Spring Rate Compilation

Thanks MA70!

I have been trying to find the rates of the whitelines for awhile.
You must have found someone intelligent there, when I contacted them, they had no idea.
Hah, this lowering spring rate compilation has been up for awhile. You must have been waiting for a LONG time. :p
 

Piratetip

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#9
Re: Lowering Spring - Spring Rate Compilation

Hmm, haven't noticed until now. :dunno:
Either way, still good. :D
 

Mk3runner

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#11
Re: Lowering Spring - Spring Rate Compilation

Any updates to listed spring rates and such or was this a general list??
 
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#12
Re: Lowering Spring - Spring Rate Compilation

I'm still curious as to the TTR springs. I may just test mine, even though they are used.
 

Neodeuccio

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#13
Re: Lowering Spring - Spring Rate Compilation

Does anyone know of a thread that touches on which spring rates are better for which applications? I know there has to be one out there, but I couldn't find it. I know you would want different springs for a drag setup than you would for a road course set up, but I don't know how to determine which ones do you want.