agree with iridearocket - mazdaspeed make a subtle difference in feel
 

I put on the full mspeed suspension setup (now even underbody braces, so really, pretty much the whole deal; only confounding variable being smaller
wheels and tires) and as far as "feel" goes, yeah, it's
tightens up on stock enough to make a noticeable difference
and make things overall a bit tighter, but it's not super-dramatic
and as far as ride goes it still seems it falls within the
comfortable but mildly "sporty" range as the stock car does
(which, remember, or at least IMHO, is scarcely targeted
at the sports-car demographic).

I may be wrong, but I doubt a passenger would notice much difference at all.

-1- Maybe the mazdaspeed spring rates quoted are wrong?
-2- Maybe ride "feel" really isn't that much affected by modest
(up to x2) changes in rate?
-3- Maybe other factors are as/more important than spring rate
in how a car drives.
I tend to supect #3 and #2 rather than #1.

Still, this raises the question: of the springs currently on the market, aside from coilovers: if you aren't getting them simply
for ride height, then why?


-ajg

once agan you have to consider tha package, not just the spring rates. Swaybars, shock valving, etc. all figure into the equation.

I run a larger front swaybar only on a Stock class setup and I can still get the car loose (oversteer) with shock and tire pressure settings

now that I'm bailing out of Stock I don't mind revealing that IMO the RX-8 benefits greatly from having bump (compression) valving adjustment capability. This requires having double adjustable shocks with the appropriate valving and knowing how to adjust them properly.

Dont I know it Team RX8.
OD

just thought id add, i believe HKS Hipermax RS are 381f, 280r

Absolutely AWESOME thread!! Thanks all for contributing!! This should be a sticky :)

This Is Already A Better One, Caleed "spring Springs Springs"

Yep, another great thread. The thing I like about this one is that it lists spring rates for both springs and coilovers. Both contain a wealth of information on the topic.

KW Variant 3 coils overs:

575 lb F
400-450 R which is progressive

Adjustable top and bottom.

Addtional canister resoviour to reduce heat exhaustion.

2" front lowered and 1.8" Rear lowered max!

I have the Eibach Multipro R1 coil-over with 500 lbs upfront 375lbs in the rear.

Thanks for chiming in 14 years later

Better late then never!

Not sure if the Ohlins R&T was included but here they are.

Spring Rates:

8Kg (458 lbs/in.) Front,

4Kg (229 Lbs/in.) Rear

the same goes for posting ...

https://cimg1.ibsrv.net/gimg/www.rx8...ddd26fd06.jpeg