is ground control suspension worth it?

[driftfreek]

i heard about ground control suspension and it sounds pretty cool, the problem is that i couldnt find out the springs rates, how stiff could one go with GC? any info...?

[Dattebayo]

You can go as high as you want within mechanical limits, of course...

800 would be the limit for rears, I would think. Thats pretty damn stiff. And ground control makes custom coils with custom spring rates if you call them and ask.

[driftfreek]

konis r the best shocks/struts out there huh? but theyre expensive. like 700 bux, plus GC 350 bux, you mind as well get coilovers.right?the shocks that one could get would be based on your spring rate right? for example u cant get a cheap shock that is not going to hold that much spring rate or else it will blow huh? are konis n kybs or someother brand going to be able to handle such stiffness?

[boznuttz]

I had GC and Koni Yellows. F***ing AMAZING. I'm going to call Eibach in another few weeks and get another set. Currently I'm using Yellows with Megan Racing Springs, and you bet your a** I'm going to order another set of GC springs.

[91rs13]

I am running GC's and Koni Yellows --Nice combination.

The first springs I go for the car were too soft in the rear ( 350 lbs) and I have upped them to 500. Fronts are 550lbs. this is primarily an AutoX/ Track day/time trial car

[boznuttz]

After a certain point, you may want to revalve your Konis if you want to handle much stiffer spring rates for compettative use.

[91rs13]

After a certain point, you may want to revalve your Konis if you want to handle much stiffer spring rates for compettative use.

You are right --not sure if that will happen over the winter or not ( $$) I want to get a HANS.

[nissanman04]

like 700 bux, plus GC 350 bux, you mind as well get coilovers.right?

Not exactly, I'd prefer a koni/GC setup over a lower-end coilover any day. The valving on the konis is gonna be way better than what you'll find in a "JDM-style" coilover, plus you get to pick your springrates.

[boznuttz]

I've actually prefered this setup over any other coilover that I have seen or been in the car with. The dampener performance is simply amazing....not to mention, the lifetime Koni warranty just makes em jump for joy.

[driftfreek]

how much is one of those setups? dont konis handle up to 600lbs or spring rate? if true. theres no need to re valve it huh? unless ur going over that?

[driftfreek]

550 in da front... how bout in da rear? what do you mean by revalving? im new to this whole koni/gc thing. i thought konis could only handle as much as 600-700 lbs. if you revalve it, would it handle morehan those spring rates? how about tha 8611s? double adj. and hold much higher spring rates.

[nismofly]

yellows can handle 700 lbs, thats like 12.5 kg/mm, plenty for a 240

you can have them revalved to match the rates you pick, GC's are available in 25lb increments iirc

just remember theyre not dual height adjustable, so if you want to be slammed youd be better with coilovers

[veilside180sx]

yellows can handle 700 lbs, thats like 12.5 kg/mm, plenty for a 240

you can have them revalved to match the rates you pick, GC's are available in 25lb increments iirc

just remember theyre not dual height adjustable, so if you want to be slammed youd be better with coilovers

Koni yellows do not have sufficient damping to run more than a 450 lb spring on it w/o revalving, unless you really don't mind that underdamped feeling.

if you want to run higher rates than that you should be moving up to a 8610 or 8611 insert, which of course requires custom housings.

Modified by veilside180sx at 4:58 PM 10/26/2007
Modified by veilside180sx at 9:16 PM 10/26/2007

[boznuttz]

I personally wouldn't run more than 9kg/mm front and 7.5kg/mm rear on stock yellows. They will do fine, but just feel slightly underdampened.

[nismofly]

Koni yellows do not have sufficient damping to run more than a 450 lb spring on it w/o revalving, unless you really don't mind that underdamped feeling.

actually thats what i meant to say, but i forgot to say it...they cant be revalved to handle any more than 700 lb springs, but they do have to be revalved to even get that high

[91rs13]

Koni yellows do not have sufficient damping to run more than a 450 lb spring on it w/o revalving, unless you really don't mind that underdamped feeling.

Really --I was always told 600 lbs was about the limit. I have not had any issues yet (10-15 AutoX days and 9 track days)

[91rs13]

yellows can handle 700 lbs, thats like 12.5 kg/mm, plenty for a 240

you can have them revalved to match the rates you pick, GC's are available in 25lb increments iirc

The 25lb increment depends on the spring height with GC--I really wanted to go to 475 --but had to go to 500 --as N/a on the 475 ( I think it is a 7 in spring)

I cannot see any one needing more than 500 in the rear. It is stiff. The fronts, maybe with a heavier motor ( I have a CA )--or if it was only an AutoX car --but for the track it is nicely balanced. If you are on the street for the most part --go softer.