Hey all i have a set of koni yellow's on my car and i am debating which springs would work better with the car on the road and some spirited driving at autocross events. I am looking at either the Tanabes GF210 coil spring or the Tein S-tech lowering spring. Oh yeah this car will be daily driven. Any input would be greatly appreciated. Thanks

 

I would suggest RSR Race springs. Great reputation and awesome spring rates. Linear spring rates with great turn in/steering response, but at the same time have a great ride quality. i'm running tokico illuminas on mine.

i have one set left if you're interested please let me know. I would need to ship them in the states somewhere.

Rishie

 

Any 2.5" springs will work. Generally 6" up front, and 8" in the back. I'd use 450 front, and 275 rear on a dual use car. They should cost 55.00-70.00 per corner (depending on brand). Circle track places generally have the best prices at 45-55 a corner.That is near the upper limit in front with standard valving, but works very well. Combine that with some RB adjustable sways, you will not be disappointed. You can run a 17x8 with a 235-40-17 all around, or a 17x9 out back with a 255-40-17. I am assuming you have GC coilovers, otherwise, change the spring lengths. Carl

 

Actually i have the tein stechs on my car. But recently i have heard bad things about them such as causing the shocks to blow (i am not sure how true it is and i would like to know if it is or is not). Also the fact that the front springs rub on all my rims. I have 3 sets 2 which are stock 88 gxl and 90 gx rims and a set of ronals; I really don't want to have to run spacers on the front. Neways the point of this thread is that i want to know about any good or bad experiences with these springs or any springs on these shocks because i am debating whether or not to sell my tein springs and go with any others that are suggested. The reason i specified the tein and tanabe is because of how close of a price range they are and because i already have the teins and i can easily get ahold of the tanabes. The other reason for this thread is because the koni shocks are more of an investment then the springs and therefore b4 i start driving this car i don't want to risk any damage to the shocks (i could care less about the springs). I hope this help you guys to understand my situation so that you guys can help me out. Thanks for all the help.

 

i don't have any first hand experience with the springs mentioned, so can't help you out there.

but another great option is to consider using your Konis with the GC coilovers. that way you will have a large range to play with, a dozens of spring rates to choose from:
http://www.ground-control.com/?D=29b...85f81bae188263

- Aaron

 

I second this suggestion, I don't know how it would relate to the Mazda world(but it should since Koni is Koni right?), anyway in the Honda world, when I was a Honda enthusiast, the best coilover setup for the buck was a GC coilover and Koni Yellows.

Also, there have been many comparisons on shock dynos between Koni yellows and other manufacturers like Tein, JIC, or insert any JDM brand, and the Koni Yellows outperformed them all or most of the market on the shock dyno.

The Koni Yellows warranty is not void depending on how much you lower them, stock valves have been known to easily handle 800 pound springrates, but they can also be revalved for aggressive springrates if you plan on seriously racing down the road with your car.

 

With all due respect the Koni Yellows are maxed out at 450-500 for the fronts, and about 350 for the rears on an FC. They can be revalved, but you would be better off specing a Double adjustable at that point. The FC will work well at the track with the rates I listed above. Now if it is a Koni Yellow for a MKIV Supra, or some other car in the 3600-3800lb range, then maybe, but not the ones for an FC. Carl

 

I would concur with Carl Byck.
Our 20B track FC runs Koni yellows front and rear with GC coilovers.

Our current set-up is 500 front / 400 rear.
We're going to try and bump it up a little up to 550 F / 500 R, and eventually max it out at around 600F / 550 or 500 rear.
The Koni yellows are getting to be on the edge of it's adjustment.
Don't try this at home kids, as the huge spring rates makes it unbearable on the street.
This is on a dedicated drift race vehicle.

The Koni yellows should be able to handle almost any stock aftermarket drop-in spring out there.


-Ted

 

these Koni shocks are also about the only aftermarket standalone shock that can be readily revalved, rebuilt, and also modified to provide seperate rebound and compression adjustment.
so you can start off cheap and then start spending the cash for more adjustability

 

I wasnt recommending running such aggressive rates on stock yellows, but some people have run them, and from what I have seen the yellows handled them. Of course, Koni suggests you revalve the Yellows for such rates.

Just giving an example on how sturdy the yellows, and especially for the price you get them.

I plan on getting them for my FC along with GC coilovers with 300'ish spring rates.