mingkie

What do you think about TEIN S-Tech Spring?
I see it from ebay for $145.00.
any body use TEIN S-Tech Spring?
I want to hear your opinion.
Thanks all !!!

LOSTinWANKELS

from what evo owners were sayin they liked them....gives a good ride and this was on stock struts..dosnt slam the car but its a good sized drop....id definatly try em out....cant go wrong for 150

scotty305

iTrader: (2)

I had some on my 2000 Subaru Impreza 2.5RS , they dropped the car to a nice stance. I think it was almost a 2" drop though, it lowered my car a lot, and also lowered the front of the car more than the rear. This made the car tend to understeer (more weight balanced up front), and I also didn't like the 'lowered car' tendency to scrape and ride harsh.

They were much better than the Intrax springs it came with though, intrax springs really suck a lot, don't ever buy those.


I ended up with stock springs, I preferred the ride quality and versatility.


-s-

Howard Coleman

iTrader: (6)

you can go wrong for 150...

for instance, if they actually lower the fd 2 inches (and i don't know that they do) you will be unable to dial out enough negative camber unless you go to adj length upper A-arms. the fd is has a genuine racecar suspension which features negative camber gain as the wheel rises... just like if you lower the car w shorter springs. as you change rideheight you have to readjust camber. if you lower the car 2 inches you will be only able to readjust the camber to minus 1.75 degrees which is too much for the street... you will wear out the inside of your tires and the car will be unstable under heavy braking. in addition the shocks don't have that much bump travel and you will bottom out your shocks and break them.

that all being said i would be surprised if Tein sells a set of springs that drop the car to the point that you do have a camber and shock travel problem.

BTW, as to scotty's comment re weight transfer... if you lower, say, the front of a car you transfer more weight to the rear. the weight transfer and raised rear roll center would make the car oversteer. the car could have understeered after the spring installation due to the springs having a higher front to rear rate bias or perhaps the camber may not have been readjusted... please don't take this as a flame as no intention.
i have raced scca for 22 seasons and suspenion is my specialty. i have a shock dyno and a dead accurate spring rate tester...
if you are looking for springs for the fd and you don't want to spend the $900 for a really good set of coil-overs ( i recommend the Tein HA) i highly recommend the Eibach Pro Track springs. many people who run them consider them to be their single favorite mod on their fd... they transform the car and work very well w the stock shocks. spring rate is up 33% over stock and they set the ride height very close to perfect.
good luck,
howard coleman

scotty305

iTrader: (2)

Howard, no offense taken. I know a lot of the quality Subaru tuners and racers preferred a taller front spring/shorter rear spring. The exact opposite of what the Teins did. It might have been for rallying (ground clearance), but most of them claimed that it helped with the balance of the car.

For the Subaru, the best road setup was Prodrive springs, or full coilovers if you had the money. I don't think Prodrive builds anything for RX7's though.


Howard, any opinions on JIC coilovers? I like their idea of adjusting the mounting point rather than using shorter springs.

-s-

Howard Coleman

iTrader: (6)

i haven't evaluated the JIC product. i have had extensive experience w Tein HA coil-overs. the HA is near the bottom of the coil-over line pricewise but IMO they are superb. beautifully built and finished, very nice spring rates for the fd and the 16 setting shock valving is squarely in the middle of where it needs to be for the springs. (i have dynoed the shocks). all for around $900. i have run them for 4 years.
howard coleman

Kaotic Dan

Here's some more info! Spring rates for Front = 7.8kgf/mm or 436lbs/in, Rear = 5.8kgf/mm or 324lbs/in. Drop for Front = -36mm or 1.4in, Rear = -33mm or -1.3in.

Here are some photo's, straight off of Tein's website.

roadsterdoc

The height looks perfect to me. how do those rates compare with other springs, like the RB, PFS comfort and H&R?