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Old 07-24-2002, 11:26 PM   #1
Night Kid
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Default Anyone have Ground Control Coilovers for their WRX?

Anyone have Ground Control sleeve coilovers for their WRX?
Anyone know what kind of spring rates are available? Thanks
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Old 07-25-2002, 10:12 AM   #2
ConeMasher
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Spring rate? Whatever you want, in 25 lb. increments if I recall correctly.


-- ConeMasher
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Old 07-25-2002, 03:05 PM   #3
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I have a set sitting in my garage for the last few months. Probably not installing them until Tokico or someone else comes out with a good strut replacement.

Springs rates are as CM mentioned.

Paul
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Old 07-25-2002, 09:40 PM   #4
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Quote:
Originally posted by Snowphun
I have a set sitting in my garage for the last few months. Probably not installing them until Tokico or someone else comes out with a good strut replacement.

Springs rates are as CM mentioned.

Paul
Showphun, (and anyone else who has a GC kit) what rates did you order with your kit? I was talking to Chad @ GC today, and they recommended 325F, 250R. He claimed that that cobination is the standard starting point. I don;t know now if he meant for the WRX or for strut suspended cars in general. I'm going to call back and talk to Tony the owner as he has a WRX with a kit on it and pick his brain a bit.
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Old 07-25-2002, 10:32 PM   #5
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I think you'll find ample info on GC setups for WRXs if you use the "search" function.

315F/280R works for me. Other rates available.

Happy Motoring
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Old 07-26-2002, 12:36 AM   #6
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I've been searching all day and i am finding rates all over the place. From one guy ins a GC8 with 500F/350R to a guy in a GDA with 170F/120R which is just stock. I am thinking that something like a 300F/225R in a 10" spring so i still have some shock compression left after the weight of the car compresses half the coil.
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Old 07-26-2002, 08:10 AM   #7
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i'm running 300/250 on my GC8
spring lengths are 8"

i don't know if the WRX are that much heavier..
but 10" might put you to stock height even at the lowest setting

i have a 2 finger gap front and that's already nearing the bottom of the treaded collar. so if i have it all the way up the collar i would have something higher than stock

rear is a bit more flexible, with one finger gap and i'm at about the middle of the collar
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Old 07-26-2002, 06:02 PM   #8
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After calling GC an picking Tony's brain for a while, i've decided on a 280# 9" front spring and a 250# 8" rear spring. This setup is a substantial improvement over stock rates of 160/120 (M/T sedan) and also over the typical aftermarket coils (eibach, h&r, prodrive, spt, etc). I'll be coupling these with the Koni inserts and STi top hats as well. Should give me better rotation at the auto-x without rattling my teeth on my everyday commute here on the east coast where the roads alternate between smooth as glass and war-torn.
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Old 07-26-2002, 09:09 PM   #9
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Please report back once it's installed!


-- ConeMasher
Someday considering STX
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Old 07-29-2002, 03:21 AM   #10
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hey,
sorry i didn't find this sooner. i have 300lb springs all around. i believve they are 9", but i don't know. if you talked to tony, he probably set you up with exacly what you were looking for.
i auto-X, and with this set-up, the rear end comes around easier, but it still pushes. i am actially thinking about going to a 325lb spring on the rears. not that i'm complaining. in my first race out with them, i got a 4th. in the two since then, i scored a 1st, and a 2nd !
good luck,
james
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Old 07-31-2002, 12:50 AM   #11
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James, what do you use as a damper with your 300# springs?
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Old 08-02-2002, 10:53 PM   #12
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i'm running on the stock shocks. the ride is really bouncy when you lower it too much, but that's how i have my alignment set. so, i'm just waiting for something to come out that's good and cheap. i'm saving up in the meantime. i might just end up buying a real set of coilovers if i save up enough money and there still aren't any shocks available.

oh, and i'm aware of the koni inserts. i don't want to cut up my stock struts.
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Old 09-26-2002, 11:36 AM   #13
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Just a little teaser with more to come!!


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Old 09-27-2002, 12:05 AM   #14
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Quote:
Originally posted by Cosworth
After calling GC an picking Tony's brain for a while, i've decided on a 280# 9" front spring and a 250# 8" rear spring. This setup is a substantial improvement over stock rates of 160/120 (M/T sedan) and also over the typical aftermarket coils (eibach, h&r, prodrive, spt, etc). I'll be coupling these with the Koni inserts and STi top hats as well. Should give me better rotation at the auto-x without rattling my teeth on my everyday commute here on the east coast where the roads alternate between smooth as glass and war-torn.
That's pretty much exactly the setup I'm planning to go with on my Legacy. I hadn't talked to anyone at GC yet, but I was figuring something in the 300f/250r ballpark, and it sounds like my guess wasn't too far off.

Unfortunately, the front Koni inserts for the Legacy are a 10-14 week special order, by which time I'll be at sea for 6 months, so I'll be doing this at some point next summer.

Definitely let us know how they feel once you get them on the car.

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 09-27-2002, 01:12 AM   #15
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Quote:
Originally posted by Patrick Olsen
Unfortunately, the front Koni inserts for the Legacy are a 10-14 week special order, by which time I'll be at sea for 6 months, so I'll be doing this at some point next summer.
Patrick, i'm not familiar with the compatibility of the legacy suspension WRT the impreza (i think i remember folks using legacy DMS CO's on impreza's though), but ILP Performance actually has some impreza model koni's in stock that they've been sitting on for a while.
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Old 10-01-2002, 10:57 PM   #16
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yup both single and double adjustable koni's in stock the doubles require an exchange of a stock set of struts because there is some welding and machining involved with making them work correctly.

and the doubles although originally designed for G/D stock autocross competition work much better on lowered and stiffer suspensions, they are based on Koni's Improved touring valving.

Jeff
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Old 10-01-2002, 11:23 PM   #17
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Cosworth, you originally claimed you were going 280F 9" & 250R 8" ... but now I see you went with 280F 9" and 300R 8". Why the drastic change in the rear? Yes I understand you want to eliminate understeer, and generate on-demand oversteer... but that's a pretty serious spring shift rate. Why I ask is it might seem that a rear rate is "too high" for the weight of the rear, but is chosen for it's ability to eliminate the natural understeer.

Perhaps a higher rear swaybar setting coupled with higher rear shock settings (than the front) will achieve the desired result with less of a full-time ride quality sacrafice?

I don't mean to question your decision as much as try and understand the thought that went into this. I'm trying to find the "ideal balanced" spring rates, because I figure that during the off season, or on rough courses, or a rainy event, you can lower the swaybar setting or shock setting, but swapping springs is a bit harder.

My thinking is as follows:
Ways to reduce understeer:
1. Substantially higher/lower rear pressures: sacrafices grip. avoid this unless no other choices have worked. Ideally choose best tire pressure to maximize grip for each wheel.
2. Camber: reduce rear camber. Sacrafices grip. Again, ideally choose another change.
3. Increased rear spring rate: Increases roll resistance, reducing understeer... increases ride harshness
4. Increased rear sway bar: Increases roll resistance, reduces understeer... no substantial increase in ride harshness, but easy to alter
5. Increased rear bump+rebound: Increases roll resistance and responsivenesss... increases ride harshness, but easy to alter.

You may need to do all five, but #4 and #5 have virtually no negatives and can be performed quickly.

-- Gary
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Old 10-02-2002, 12:50 AM   #18
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Gary, there is a very quick and easy asnwer to your question: I made a typo! I am indeed using a 250# rear spring. the 300 wasa typo that i'm not really sure where it came from!?!? In any event, i agree with what you say about increasing rear damping and/or increasing rear bar. I do have adjustable whiteline sways that i can adjust and even go as far as raise/lower the rear spring height to get some oversteer.

Sorry for the confusion!

Jon.
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Old 10-02-2002, 01:52 PM   #19
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Right now I have KYB with H&Rs.....I like it....But I would like to have the front a tad lower and maybe the rear a very tad bit higher....Basically, what combination has worked as far as the GCs go when coupled with the KYBs.....I just want both front and rear to have that tire to fender look....doesnt have to be slammed maybe a finger or two of room....but i want that even look.....
Oh I also have the STI hats too.....
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Old 10-02-2002, 02:20 PM   #20
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Danny, you could go with a 300#, 8" front spring with a 250#, 8" rear spring and the KYB GC sleeves which would allow you to adjust to that exact height, but these are going to make your car even stiffer than the H&R's. You could even step down to like a 275f/225r or a 250f/200r, but that might be way too soft for an 8" spring so you would be very close to coil bind at static rest height. You might want to call Tony at GC as he has a wrx and can tell you from an experts point of view how to get it where you want.
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Old 10-02-2002, 04:56 PM   #21
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Quote:
Originally posted by Cosworth
Danny, you could go with a 300#, 8" front spring with a 250#, 8" rear spring and the KYB GC sleeves which would allow you to adjust to that exact height, but these are going to make your car even stiffer than the H&R's. You could even step down to like a 275f/225r or a 250f/200r, but that might be way too soft for an 8" spring so you would be very close to coil bind at static rest height. You might want to call Tony at GC as he has a wrx and can tell you from an experts point of view how to get it where you want.
Will do....thanx alot man!
I dont really mind if its that much stiffer...I can take a lil harsher as its not to bad right now....

Danny
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Old 10-29-2002, 01:57 AM   #22
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bump

any word on the GCs Cosworth?
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