New Tein Product Announcement H-Tech Springs
 

We will release more info as it becomes available.
Thanks guys!
Rick

To translate into Imperial units, it's 258 lb/in front and 168 lb/in rear spring rates. This might be the closest yet to knowing the stock rates, as lowering springs can't deviate too much from stock without creating awful ride characteristics [i.e. bouncy].

Considering the front is a Mac Strut and the rear has some notable motion ratio, the wheel rate delta front to back is rather biased, with a very soft rear wheel rate. Does anyone have the rear motion ratio of the Impreza/WRX/STI?

Still waiting for RCE to tell us their rates ;)

In general Subarus seem to be pretty highly sprung in the front compared to rear. This car they did the same, compared to Toyota. RCE bumps the rear rate a lot more than the fronts on their STI springs. IMO Subaru isn't very good at suspension tuning (as far as springs and dampers go).

I disagree that you can't change rates much on stock dampers. On the STI I know that the stock bounciness is actually caused by the car being undersprung for its dampers. Again, RCE raises their spring rates significantly front and back to get rid of the stock bounce. Just the backs even more so.

Subaru's alleged tuning incompetence aside, most OEM's match their spring rates to the damper curves reasonably well. As such, deviating too far from OEM rates with OEM damper curves isn't a good idea. FWIW, "bouncy" or "floating" are used to describe underdamped situations, whereas "harsh" or "jolting" are descriptors for overdamped. The situation you're describing is an exception and not the norm.

In the end, it's all about matching the vehicles' parameters such that you achieve the desired wheel rate with the damping curve philosophy of your choice [be it "ideal" or not]. If Tein put the stock dampers on a dyno and found the stock spring rates to not be appropriate, they may feel it necessary to adjust the rates of their offering accordingly.

:thumbup:

Sure, I was just chiming in with my layman input from experience. I don't think we are disagreeing after reading your post. Hopefully RCE will stop by and expand.

nevermind, carry on. :)

I always thought it was common knowledge that S-Techs suck.

Let's keep the discussion on topic please - about springs.

Since RCE is here, and they have aftermarket springs, can you tell us the stock spring rates yet? And if that is part of an information embargo, can you tell us when the stock spring rates an be released?

Thank you.

Damn I obviously missed some entertainment :(

In for stock spring rates though.

We'll start a different thread soon and keep this one on topic.

Needs moar low. I hope TRD Japan has more agressive springs like they used to offer in the 80's and 90's... Ones for the MK1 MR2 would lower it be 2.25"F and 1.75"R