Does anyone know what the spring rates are for the off the shelf Ground Control Kits for the J-body?


-Vincent K.
1998 Z-24
2001 THSCC STR Class Autocross Champion
Member of Solo Sport Racing
www.solosportracing.com
http://www.j-body.org/members/vkz24/
"Luck is preparation given an opportunity"

Why not just call them? I ordered my front setup with 525# springs, I think the normal rate is around 375#.

My first reaction was 380#, so it might be 375#. Somewhere right in there. They'll make you whatever you want, call them.

VK,

I will have to check my notes. I used to know what the spring rates were. Off the top of my head is 375 front and 250 rear. I currently have a progressive 150-450 up front and 300 in the rear on my Mantapart setup, though I am thinking about going with a straight 400 lb spring up front






Jason
99 Z24

Racers Edge
Johnny Mack Turbo Systems
Engineered Performance

That's correct. 375 Front, 250 Rear, and all an inch too short for my liking.

Anyone know the rates for the H&R springs used in RK's Coil-overs?


-Vincent K.
1998 Z-24
2001 THSCC STR Class Autocross Champion
Member of Solo Sport Racing
www.solosportracing.com
http://www.j-body.org/members/vkz24/
"Luck is preparation given an opportunity"

Look who has come out the wood work.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

Mylife75 (ajose) wrote:Look who has come out the wood work.

Who?

375F/325R

C.T.S wrote:375F/325R

OK thanks. Any idea if I can get any rate I want on them from RK? Those are too low for a track setup.

RK only sells those. They get them from H&R..
GC is the only company I know that will custom make any order at no extra charge.

C.T.S wrote:RK only sells those. They get them from H&R..
GC is the only company I know that will custom make any order at no extra charge.

Again thanks for the info. So where can I order a G/C kit with my choice of spring rates?

From GC: Linky

There's a box where you can type in what spring rates you want.

Hey bro!

Note that any GC dealer should be able to order them for you with whatever specs you ask for.

If you get in touch with GC directly though, they can provide a lot of valuable insight to figure out exactly what it is you need.

VK,

Since you already have the GC hardware, you can just order the Eibach springs from GC. Last time I talked to them they wanted $60 a piece for springs.

BTW, I am sending you pics of a new toy I got




Jason
99 Z24

Racers Edge
Johnny Mack Turbo Systems
Engineered Performance

Jason McElvy wrote:VK,

Since you already have the GC hardware, you can just order the Eibach springs from GC.

??? I don't have any G/C hardware. I have Koni Reds with Intrax springs. I'm looking to go to Koni Yellows and G/Cs before my next track event in February.



-Vincent K.
1998 Z-24
2001 THSCC STR Class Autocross Champion
Member of Solo Sport Racing
www.solosportracing.com
http://www.j-body.org/members/vkz24/
"Luck is preparation given an opportunity"

Damn, my bad. I guess I haven't read your registry in a long while




Jason
99 Z24

Racers Edge
Johnny Mack Turbo Systems
Engineered Performance

Wild Weasel wrote:That's correct. 375 Front, 250 Rear, and all an inch too short for my liking.

Do you know the free length dimension for the rear? I need a higher rate in back for track.


-Vincent K.
1998 Z-24
2001 THSCC STR Class Autocross Champion
Member of Solo Sport Racing
www.solosportracing.com
http://www.j-body.org/members/vkz24/
"Luck is preparation given an opportunity"

VKZ24 wrote:

Wild Weasel wrote:That's correct. 375 Front, 250 Rear, and all an inch too short for my liking.

Do you know the free length dimension for the rear? I need a higher rate in back for track.

6" front and 8" rear i would use like a 300lb in the front and 270-300in the rear if i were you. with 375 up front because on surfaces that dont have a lot of grip. the front is too stiff and over all fromt end grip is not as good as it could be. the only good thing about the 375 is that the car changes direction very well and makes turn in nice so you can get the car pointed to get ready for under steer.


see ya!

so regular Ground Controls springs usually are 6" front and 8" rear / 375 lbs front 250 lbs. rear / 2.5 diameter???

once i have this confirmed, i will start on my custom coilover / d spec project soon


instagram: peru_stylez