I have 550/375 and I noticed the same thing. I think I am use to it now a couple months later but its rather bouncy. I think it has to do with the rebound...which is not adjustable on koni shocks. But then again I could totally be wrong...

 

Ground Controls are garbage. They don't come with matching shocks so you have to get custom shocks made. Good luck.

 

DOH - really? So am i pretty much screwed and have to live with the bouncy ride?

 

The bouncy ride is due to your springs, not your shocks, the shocks just control your springs. You should notice that you can take turns wayyy faster now and the car should handle 10 times better. The bouncy ride is the consequence.
I have GC's and tokico adjustables and the ride is bouncy but tolerable. If its too bouncy for you, try calling up GC and seeing if they can get you softer springs, last i checked it was $50 a spring.

 

How do they handle on the track? I fear that if I'm bouncing all over the place while driving - I vision this horrible 1/4 mile of boucing and skipping all the way down the track while attempting to get my FWD to hook up.

 

I think I'm gonna call GC and see if a can exchange my springs. I'm gonna do 350f / 450r instead. Why do people put higher rates in front instead of the rear?

 

more weight in the front b/c of the engine.

 

Here's what another DSMTalker had to say, and I think he's correct:

4) The 2G DSM has an oddball front suspension design. It uses a double lower ball joint suspension that pivots the steering around the instant centre between the two lower ball joints, instead of around a single ball joint like most 4-links. As such, the suspension links move around a lot and must be able to retain their range of motion.

That means the Ground Control upper spring mount plate, in which the upper spring mount is the underside of a fixed aluminum plate, is pure garbage. Instead, you want an upper spring mount "hat" that remains coaxial to the shock rod, and you want the shock rod mount to be located by a spherical bearing, sometimes called a "pillowball mount" (which, BTW, is a horrible riceboy term)

Moriss Dampers sells such a beast. http://www.morissdampers.com It's not on their website, but call Evan and he'll quote you a price.

Incidently, you cannot use poly bushings in any part of the 2G suspension save the upper A arm pivots. See http://farnorthracing.com/a-arm.html to see a real racecar solution.

So, to sum up:

Properly lowering a street 2G DSM requires the following parts:

- 1 set (4) Koni Yellow shocks
- 1 coilover kit, preferably with Hypercoil springs
- 1 set (4) upper spring mount hats w/spherical bearing rod supports
- 1 4-wheel alignment immediately following setting the ride height

DG

Here's the link to his full post:
http://www.dsmtalk.com/forums/showthread.php?s=&threadid=76614

I'm also having GC coilovers and Koni yellow struts on my car now, but I'm ordering a set of Tein SS coilovers as the GC coilovers and Koni struts are falling a part. Does anyone have this setup? How does it ride/perform? How's the quality? I hope this Tein SS set will be the last suspension modification that I have to do for a LONG LONG time. Or I'm gonna go back to the stock suspension...

 

What was your GC spring rates?

 

I'm also having GC coilovers and Koni yellow struts on my car now, but I'm ordering a set of Tein SS coilovers as the GC coilovers and Koni struts are falling a part. Does anyone have this setup? How does it ride/perform? How's the quality? I hope this Tein SS set will be the last suspension modification that I have to do for a LONG LONG time. Or I'm gonna go back to the stock suspension...

I have Tein type flex's and I love em. Still have a comfortable ride and they handle great.

 

My car is super bouncy, I have Goldline Springs and KYB AGX's. The fronts are 4 way stiffness adjustable and the rears are 8. I have them set on the stiffest setting right now. I love the way it handles now. Ooo and if you have a girl with big boobs in your car they will bounce too.

 

I guess I don't understand how a bouncy ride will improve my 1/4 mile time. My stock suspension didn't bounce a fraction of what it does now. I fear the bouncing will cause excess wheel hop on the track thus causing more issues. Does anyone have any track time with the bouncy aftermarket suspension?

 

No no the stiffness of your suspension is what causes the bouncing. In fact you should have better traction at the track, when you accelerate the front of your car will not lift as much I think. And you shouldn't expect the track to have bumps, unless its a crappy track.

 

1) Bounce = bad.

2) Whatever spring rates you choose, you have to get shocks with matching damping rates.

3) If your damping rate is too low, you will bounce!

4) Get a set of real coilovers like TEIN and you won't have any problems!

 

1) Bounce = bad.

2) Whatever spring rates you choose, you have to get shocks with matching damping rates.

3) If your damping rate is too low, you will bounce!

4) Get a set of real coilovers like TEIN and you won't have any problems!

The downside is that I have already kicked out the money for the GC/Koni setup. I figure the most economical option is to purchase another set of springs @ $55 from GC. How do I find out what the dampening rates of the Koni Yellow are so that I can match springs to them? I know that the 500lb front with 350lb rears are bouncy so I'm thinking of lowering the rate up front to the 350 range. There just isn't much information about GC setups that I can find. There are a lot of GC threads but none that have actually information on spring rates and 1/4 time differences. This weekend I will buy some wood (make ramp) and a new floor jack to finish adjusting the height, then hopefully get an alignment if my camber isn't off a lot. If this gets done I can take it to the track on Wed. and log some track times with this setup so other people can have information about this before spending money. No one seems to have any track info with this setup yet, but a lot people have the setup.

 

yeah, cheapo coilovers will cause your ride to suck. I have GCs with tokico adjustables also, and my ride absolutely blows ass. But it handles really well My roommate has lowering springs on his talon, and it rides a lot smoother than my car. If youre dead-set on coilovers, spend the extra money on real ones like Teins.

 

The downside is that I have already kicked out the money for the GC/Koni setup. I figure the most economical option is to purchase another set of springs @ $55 from GC. How do I find out what the dampening rates of the Koni Yellow are so that I can match springs to them? I know that the 500lb front with 350lb rears are bouncy so I'm thinking of lowering the rate up front to the 350 range. There just isn't much information about GC setups that I can find. There are a lot of GC threads but none that have actually information on spring rates and 1/4 time differences. This weekend I will buy some wood (make ramp) and a new floor jack to finish adjusting the height, then hopefully get an alignment if my camber isn't off a lot. If this gets done I can take it to the track on Wed. and log some track times with this setup so other people can have information about this before spending money. No one seems to have any track info with this setup yet, but a lot people have the setup.

Ya, the cheapest thing to do is get another set of springs. I have no idea where you can find information on the correct rates. You should contact GC directly, they should have a lot of experience with this.

 

Ya, the cheapest thing to do is get another set of springs. I have no idea where you can find information on the correct rates. You should contact GC directly, they should have a lot of experience with this.

If you do this please post and let us know...there are a lot of us out here with gc's/konis that are bouncing around

 

If you do this please post and let us know...there are a lot of us out here with gc's/konis that are bouncing around

Will Do! On Wed. I will hit LACR and see how the 500f / 350r do on the track so I have something to measure by. I know what my stock suspension did (13.9 @ 106 2,710 asl). One thing I have noticed while driving around is that at WOT it seems to lock down pretty nice and the bouncing goes away. To bad that all the other times I'm bouncing up and down like a reatard on a pogo stick. I will keep everyone posted.

 

The downside is that I have already kicked out the money for the GC/Koni setup. I figure the most economical option is to purchase another set of springs @ $55 from GC.

any 2.5" Inner Diameter spring will work. unless you're absolutely dead set on Eibach springs, you can also get Hypercoils or any other brand.

I'm using 350lb./inch, 7" long QA1 springs from Summit Racing in the rear. $36.95 each
Not on GC's, but another brand of sleeve-type coilover.

 

another fucked up suspension brought to you by the folks at ground control... consistently breaking shit with their horse's ass coilovers. thanks guys. never, ever, ever ever ever ever- get those coilovers you have to match with shocks, like skunk2, gc.

check these threads out...

GC coilovers suck

Skunk2 Coilovers suck

 

another fucked up suspension brought to you by the folks at ground control... consistently breaking shit with their horse's ass coilovers. thanks guys. never, ever, ever ever ever ever- get those coilovers you have to match with shocks, like skunk2, gc.

check these threads out...


Skunk2 Coilovers suck

wow, in the same thread.....

I got a chance to take my shock off today and well it was not the coil-over itself but actually the strut bearing plate was destroyed

You have such a negative opinion on sleeve-type coilovers as if you've had experience with them. DG says they suck, and for him they probably do since his car's setup for serious auto-xing. Yes, true coilovers are 10 times better, but not everyone wants or needs to spend close to $1K on a suspension setup. I'm sorry, but I have bills to pay and prefer to have somewhere to live and food to eat than an awesome suspension on my freakin' car. For every person that says they suck, there's someone else who has nothing but good things to say about them. I would take your words into consideration, but do you even HAVE any mods on your car!?

 

Well as of now I have no opinion on the GC setup. I have replacement springs coming at the rate of 400f / 250r. When i last spoke with them they informed me that the 500f/350r is basically a very bouncy ride (which I already figured out) and designed more for track use. I will try the 400f/250r setup and see how it handles. Does anyone know what the stock spring rates are? Hopefully these rates are slightly stiffer than stock but not as severe. I'll let everyone know the results. I should have them installed by this weekend.

 

ive personally seen GC coilovers spilt straight up the middle of the spring on a daily driver. so yes i have a strong opinion of them.

 

Well if the spring itself broke you should be pissed at Eibach not GC. Eibach makes the springs.