ground controls - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

CoasTek240 · 08-29-2003, 05:07 AM

does anyone know what they mean on the ground control website, when next to our 89-94 nissan 240sx it lists :"89-97 240SX (autocross kit, firm ride)"
also it's 0-4" height adj right?
and you can ask for any spring rate...right?

what would be a good spring rate to match with my koni sports?... 8/6.5kg/mm?
any advice would be nice..

like wheres the cheapest to buy em

*DSC* · 08-29-2003, 06:16 AM

Correct me if I'm wrong but 8/6.5kg/mm would be a bit stiff for stock koni's, especally if your lowered much.

I think I'd just go with the stock (gc) rates or atleast the stock front/rear ratio.

Personally, I wouldn't even know where to begin when picking custom rates. It'd take a lot of testing I think, or a lot of research and comparison between other springs.

I'd buy them straight from groundcontrol.

AKADriver · 08-29-2003, 07:56 AM

Stock f:r ratio is 1:1.

Ground Control like most companies sets their default rates a little front-stiff. For a lowered 240SX it seems to be the way to go... you want to keep the front end off the bumpstops and in the "sweet spot" of the travel. McPherson strut suspensions have a limited range of useful travel before the geometry gets wonky.

GC's off the shelf rates are pretty well chosen, I'd stick with them unless you want something softer. I wouldn't go harder on stock replacement type struts (Koni or KYB).

*HaLo* · 08-29-2003, 10:38 AM

Actually, I've got some ground controls with AGX. They come with 425 lb front springs and 250 lb rear springs. I changed the rear springs for 375 lb and I'm having no problems with them...

If the front struts can hold 425 lb springs, why would the rear not hold 375 lb springs???

*AceInHole* · 08-29-2003, 10:41 AM

Quote:

Originally posted by HaLo
If the front struts can hold 425 lb springs, why would the rear not hold 375 lb springs???

Possibly because the rear shocks have smaller diameter pistons.

Flybert · 08-29-2003, 10:50 AM

You probably should get the konis revalved to work with those springs. I think it's $100 per strut. You'd have such a sweet setup after that. Do you have camber plates? It would be complete with a revalve, camber plates, and rear pillowball upper mounts.

drift freaq · 08-29-2003, 11:45 AM

The Koni's you can get through Ground Control are not off the shelf. They are custom short stroke Koni thats been revalved to Ground Control specs by Koni. They are indeed a very sweet setup for our cars.

*DSC* · 08-29-2003, 03:31 PM

I could have worded that better. I meant stock ground control f/r ratio opposed to custom, not stock from the factory. That what I meant when I put (gc) but reading it again, it doesn't read the way I meant it.
I had no idea factory stock rates were 1:1...odd.

*HaLo* · 08-29-2003, 03:44 PM

Quote:

Originally posted by AceInHole
Possibly because the rear shocks have smaller diameter pistons.

I guess... but then again, it would make no sense from KYB to do replacement shocks with different f/r valving ratio than stockers, wouldn't it?

Stock S13 Hicas has 110lbs springs all around while stock S13 has something a tad softer... something like 102 all around.

CoasTek240 · 08-30-2003, 07:01 AM

well i guess i'm gonna go with the prefab setup from ground conrtol, and match it with either the revalved koni's or a set of agx's. we'll see.

btw wheres teh cheapest place to ge tthe ground conrtols?

and what should i go with for camber/caster plates?

240racer · 08-30-2003, 09:58 PM

I posted this link in the last conversation we had about custom spring rates. Check out the install:
http://www.240sx.org/links/installs/...ng_choice.html

also, I have done a fair amount of calculations and if you have ridden in a car and you like the spring rate they have, I can tell you what would be equivalent in your car.

check out the other thread about a week ago that talks about custom rates in ground controls.

08-29-2003, 05:07 AM	#1
CoasTek240 Post Whore! Join Date: Jan 2002 Location: VA Age: 40 Posts: 3,034 Trader Rating: (3) Feedback Score: 3 reviews	ground controls does anyone know what they mean on the ground control website, when next to our 89-94 nissan 240sx it lists :"89-97 240SX (autocross kit, firm ride)" also it's 0-4" height adj right? and you can ask for any spring rate...right? what would be a good spring rate to match with my koni sports?... 8/6.5kg/mm? any advice would be nice.. like wheres the cheapest to buy em

08-29-2003, 10:38 AM	#4
HaLo from Canada, eh! Join Date: Sep 2001 Location: Montreal, Quebec Age: 46 Posts: 5,201 Trader Rating: (0) Rides Gallery: HaLo Feedback Score: 0 reviews	Actually, I've got some ground controls with AGX. They come with 425 lb front springs and 250 lb rear springs. I changed the rear springs for 375 lb and I'm having no problems with them... If the front struts can hold 425 lb springs, why would the rear not hold 375 lb springs??? __________________ -> HaLo Race Car: '98 E36 BMW M3 Daily Drivers: '23 Audi Q4 e-tron & '13 VW Touareg SOLD: 01 GPW Honda S2000 PARTED: 93 Pearl White 240SX LE Fastback w/SR20DET SOLD: 93 Super White 240SX SE Convertible w/Silvia Front

08-29-2003, 11:45 AM	#7
drift freaq R.I.P. Aya, always love Join Date: Nov 2001 Location: Los Feliz/Hollywood Posts: 18,564 Trader Rating: (215) Rides Gallery: drift freaq Feedback Score: 215 reviews	The Koni's you can get through Ground Control are not off the shelf. They are custom short stroke Koni thats been revalved to Ground Control specs by Koni. They are indeed a very sweet setup for our cars. __________________ "Having a lot of tracks on a song is like putting stickers on a car to get more horsepower" New Video https://www.youtube.com/watch?v=uebV1OnbRsw Buy my mounts! http://zilvia.net/f/sale-items/51531...ns-mounts.html http://zilvia.net/f/tech-talk/317539...e-mouts-6.html

08-30-2003, 09:58 PM	#11
240racer Zilvia Junkie Join Date: Nov 2001 Location: Minneapolis, MN Age: 46 Posts: 574 Trader Rating: (0) Feedback Score: 0 reviews	I posted this link in the last conversation we had about custom spring rates. Check out the install: http://www.240sx.org/links/installs/...ng_choice.html also, I have done a fair amount of calculations and if you have ridden in a car and you like the spring rate they have, I can tell you what would be equivalent in your car. check out the other thread about a week ago that talks about custom rates in ground controls. __________________ Adam '89 coupe KA24DE+T 14.1 @ 104 MPH '88 Celica All-Trac turbo stock, but no more ecu codes!!

08-29-2003, 06:16 AM	#2
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	Correct me if I'm wrong but 8/6.5kg/mm would be a bit stiff for stock koni's, especally if your lowered much. I think I'd just go with the stock (gc) rates or atleast the stock front/rear ratio. Personally, I wouldn't even know where to begin when picking custom rates. It'd take a lot of testing I think, or a lot of research and comparison between other springs. I'd buy them straight from groundcontrol.

08-29-2003, 07:56 AM	#3
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 43 Posts: 3,518 Trader Rating: (1) Feedback Score: 1 reviews	Stock f:r ratio is 1:1. Ground Control like most companies sets their default rates a little front-stiff. For a lowered 240SX it seems to be the way to go... you want to keep the front end off the bumpstops and in the "sweet spot" of the travel. McPherson strut suspensions have a limited range of useful travel before the geometry gets wonky. GC's off the shelf rates are pretty well chosen, I'd stick with them unless you want something softer. I wouldn't go harder on stock replacement type struts (Koni or KYB).

08-29-2003, 10:50 AM	#6
Flybert Post Whore! Join Date: Mar 2003 Location: none Posts: 3,862 Trader Rating: (7) Feedback Score: 7 reviews	You probably should get the konis revalved to work with those springs. I think it's $100 per strut. You'd have such a sweet setup after that. Do you have camber plates? It would be complete with a revalve, camber plates, and rear pillowball upper mounts.

08-29-2003, 03:31 PM	#8
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	I could have worded that better. I meant stock ground control f/r ratio opposed to custom, not stock from the factory. That what I meant when I put (gc) but reading it again, it doesn't read the way I meant it. I had no idea factory stock rates were 1:1...odd.

08-30-2003, 07:01 AM	#10
CoasTek240 Post Whore! Join Date: Jan 2002 Location: VA Age: 40 Posts: 3,034 Trader Rating: (3) Feedback Score: 3 reviews	well i guess i'm gonna go with the prefab setup from ground conrtol, and match it with either the revalved koni's or a set of agx's. we'll see. btw wheres teh cheapest place to ge tthe ground conrtols? and what should i go with for camber/caster plates?