What are the stock spring rates for the 2004 Mazda RX-8, preferably for the 6-speed M/T? Any help will do .

 

Now THAT would be nice to know...

...That and the spring rates for the MS springs

 

No I need the stock spring rates so I can figure out what kind of suspension will be street compliant and race-ready. Throwing on random lowering spring and shock combinations is a waste of time and money.

 

Was searching for suspension and I found this under Japanparts.com website for RX-8. Spring rates are listed for the various models there:

http://japanparts.com/shop/shop.cgi?...ird=Suspension

Hope this helps.

 

Thanks kgoh2262 . I'm glad this thread hasn't diead yet. I NEED THAT INFORMATION!

 

*died*

Sorry. Those are spring rates for AutoExe's lowering springs. Close but no cigar .

 

Alright engineering student, think of a way of to guesstimate the spring rate.


Hint it involves a tape measure, a calculator, free body diagram, and a floor jack.


Come back with the results

 

Or you could measure the wire diameter, number of coils, coil diameter and free length.

 

or for us with dame bramage... you could just tell us :p

 

Or, for someone who has Yamaguchi's RX-8 book, you could look it up... it's in there. I have it, but I'm feeling lazy right now. :D

 

Oh.. so that's what it's for..

p.69

Front Suspension Spring rate N/mm:
Sports = 27.3
Standard = 25.3

Rear Suspension Spring rate N/mm:
Sports = 19.8
Standard = 17.8

 

I am smart, and conceited. But it's 9:55 and it's almost time for Adult Swim. Call back later .

 

brothervoodoo, what units are those numbers in? It's kind of useless without em'.

 

 

Excuse me? Are you directing that comment at me?

 

No I'm not directing that at you Omicron. I'm sorry . It was a response to the engineering remark .

 

Thanks for the update on the units Omicron

 

Man I'm sleepy. I didn't even see that. Me fail English? That's unpossible!

 

I'm not trying to malicious, just messing with ya a little :D

Been through what you're going through minus having an awesome car in college. Good on your circuit's exam.

 

Whoops, I just noticed I omitted my smiley. Sorry about that - it was intended to be a joke. :D

Here's an extra one to make up for it: :D

Good luck on your circuits exam. I remember those days!

 

Circuits exam? Oh yeah. Oops. No it was a quiz. Nothing really to worry about. Thanks for the support guys .

 

Ok so the Stock Spring rates on the 6spd are
F 155.61 lb/in
R 112.86 lb/in

Automatic
F 144.21 lb/in
R 101.46 lb/in

Mazdaspeed Spring Rates are
F 280 lb/in
R 190.4 lb/in

Tein high tech
F 184.8 lb/in
R 134.4 lb/in

RS*R
F 181.44 lb/in
R 122.08 lb/in

Tanabe Sustec NF210 (Normal Feel)
F 162.4 lb/in
R 112 lb/in

Tanabe Sustec GF210
F 179.2 lb/in
R 145.6 lb/in

Auto Exe
F 212.8 lb/in
R 145.6 lb/in

Espelir
F 212.8 lb/in
R 151.2 lb/in

--coilover--
Tein CS
F 280 lb/in
R 168 lb/in

Tein Flex
F 392 lb/in
R 224 lb/in

HKS Hipermax II
F 448 lb/in
R 280 lb/in

JIC FLT-A2
F 448 lb/in
R 280 lb/in

Speedsource Grand Am Cup Cars
F 800 lb/in
R ??