Anyone know what the spring rates are for a set of Ground Control Coil Overs?

Don't know much about GC, huh?

They are what ever you want them to be. Reason #1328 Ground Control is better than all the other wanna-be coilover systems: YOU pick your spring rates.

I (as well as others) can give you suggestions to different spring rates but it is a technical question with a lot of variables. If I were to try and help I would want to know: what car do you have, what shocks, how low are you wanting to go, what/were do you drive (track, ¼, street), how much harshness will you accept. This is off the top of my head.

Originally posted by 98sr20de
I (as well as others) can give you suggestions to different spring rates but it is a technical question with a lot of variables. If I were to try and help I would want to know: what car do you have, what shocks, how low are you wanting to go, what/were do you drive (track, ¼, street), how much harshness will you accept. This is off the top of my head.

How bout some suggestions for me...i have no clue about spring rates....here goes:

i have a 95 200sx SER, probably going to get KYB AGX struts with a GC setup, i drive REALLY agressively on the street, i want to get the car as low as possible without ruining the ride...ive heard thats 1.5" so lets go with taht for examples sake, and i dont want an obsurd ammount of harshness but i can take a lil bit

Easy, 300/200, Personally if you want to go lower then 1 inch inches get the GC Camber Caster Plates and the Motivational rear plate. Also, get the 8 inch spring up front NOT the 7 inch that comes standard. I would also go with the spring that is 1 inch longer in back. This setup will let you go 1.75 inch down in front. You might be able to get the front AGX's for the B13 (the koni's for the b13 are 1/2inch shorter then the b14 ones).

Steve

Do you think that 450 front and 350 rear (coil overs) is too much? I don't mind a harsh ride and would like to lower about 2''. I have a 98 SE. Looking to get KYB AGX socks but wondered if I got the 450/350 setup if they could handle that high of a rate? I don't want to go bouncing all over the road or bottom out. I want it to all ballance out...lowered ride, real stiff, shocks that can handle it. What do you think?

Oops...that's SHOCKS, not socks...stop snickering.

Originally posted by blairellis
i drive REALLY agressively on the street,

Hmmm, try 900 front, 90 rear.

Do you think that 450 front and 350 rear (coil overs) is too much? I don't mind a harsh ride and would like to lower about 2''.

The previous recommendation was based on personal experience with my 98 SE. I have a friend with a 200sx with 375/300 with AGX’s that is lower then mine but still driven on the street. He does a lot of track driving so it makes sence. If you want to go lower I would consider a shorter strut in the front. The rears can be lowered 2 inches if you use the Motivational plate. You could gain ½ buy just using the Koni’s from the b13 up front with the b14 Koni’s in back. Still using 300/200 and you would be ok. I wouldn’t run more then a 375/300 with Koni’s. AGX’s I have no idea. PM me if you are willing to experiment. I live close and could make something that will work for you. It would be great.

Do you think that 450 front and 350 rear (coil overs) is too much? I don't mind a harsh ride and would like to lower about 2''. I have a 98 SE. Looking to get KYB AGX socks but wondered if I got the 450/350 setup if they could handle that high of a rate? I don't want to go bouncing all over the road or bottom out. I want it to all ballance out...lowered ride, real stiff, shocks that can handle it. What do you think?



Guys, you can NOT lower a Sentra that much without doing somthing to get more suspension travel. The ride will be shit-E no matter what spring rates you get because you will be riding around on the bumpstops.

Possabilities:
AGX shocks, GC coilovers, with GC camber plates up front (they mount on TOP of the shock tower, and move the upper mounting point about an inch up) with the motivational rear mount which accopmplishes the same thing in the rear as the GC camber plates. Budget ~$1000

Or:

Shortened shocks from Motivational, if they are still in business. Budget ~$1200.

Otherwise you will be bouncing down the road like an idiot ricer on a pogo stick.

Just to clarify ALL of my recommendations are based on using the GC camber caster plates up front. They add .75 inches of travel and really help. If you go with the B13 Koni’s you get an extra .5-inch's of travel (on a B14) add that too the .75 from the plates and you are only losing .75 inches of travel to drop it 2 inch's in height. B13's are not the same because they are already .5 inches lower in the front with the Koni's.

I have the B14 Koni's with the GC camber/caster. My car is lowered 1.75 inches in front and it never bottoms out. I had to put a 10-inch spring in front to keep the spring from coil binding. This feels the same as bottoming (really its worse because you don't get the softening effect that your bottom out bumper gives). To do this you need the Koni’s because you have to weld a new perch lower on the shock to accommodate the extra 3-inch’s of spring length. Maybe you can weld on the AGX’s but I think the heat would kill the shock (don’t really know for sure). Koni’s are inserts so you can take them out before you weld. I have my car lowered 1.5 inch’s in back. It will sometimes lightly bottom. I would like to get the Motivational Hat in back but the springs are already as high as they can go so I can’t put the hat on without going 2.5 inches down in back. I need longer rear springs.

Does anyone know if the front AGX’s for the B13 are shorter then the B14’s? If not then the trick I used with the Koni’s won’t work and you can only go about 1.25 lower in the front.

B.T.W. Matt. You were at VIR and looked at my car (weren't you???). I had the green SE with the Rota's and the GC. The other car I am referring to is Wade's. He has AGX's and 375/300. His car is lower then mine but not much.

Basically what I intended to do was buy some cheap HP coil overs off ebay (100$) They are rated at 450 front/350 rear, made to fit 98 Sentra SE. I was then going to buy the KYB AGX shocks. Maybe lowering 2'' if more trouble than it's worth so let's say 1.5"...or so. Do you think that this combo will be ok? I didn't know if those rates made for a monster of a ride or not. More or less my susp. sucks and I wanted to revamp it a little without spending big $$$. I just want a pretty firm ride while lowering the car a tad. I liked the cheap coil overs b/c I could level the front to match the rear and not have that wheel gap in front like most springs leave. Any sugges.? Help?
Thanks all!

Basically what I intended to do was buy some cheap HP coil overs off ebay (100$)

Sounds like you have made up your mind. Cheap and springs don't belong in the same sentence. I have never heard on any cheap springs that have the kind of rates you are talking about. People lie all the time about stuff like spring rates because you can't tell by appearance what they are. Unless they are made by Eibach or Hypercoil I wouldn't even trust what is printed on the spring. Take the previously posted advice or not at your own risk. I can tell you that I had 3 different springs on the front of my car before I was done. Each was a 300 inch pound spring. I only paid for the final ones that I kept. This is a value when you consider what each set would have cost me. It's not just the rate but also the length that matters. Save money now might cost you latter.

Steve

B.T.W. Matt. You were at VIR and looked at my car (weren't you???). I had the green SE with the Rota's and the GC.

Yep, that's me.

Since then I installed GC plates to replace the Cuscos I had. Suspension travel is WAY underrated. The difference was unbelievable.

I'm now wondering about the spring bind you mentioned. Hmmm. So far I've only autocrossed the car once setup like this and it was fantastic. So, I'm thinking I've finally got enough travel.

Just remember, you get what you pay for. At $100 bucks, you could afford to try them out I guess, wouldn't be out a whole lot of money, just time if (when? :P) you find you don't like them. I've got the GC/AGX combo with GC camber plates, 350 front 325 rear on my B13. I've got them set fairly low. They handle very nice, and the ride is ok. Honestly my 1st gen crx stock suspension is just as harsh. The only minor annoyance is on the interstate at the right speed the car will ocillate slightly.


Originally posted by mrtturbo
Basically what I intended to do was buy some cheap HP coil overs off ebay (100$) They are rated at 450 front/350 rear, made to fit 98 Sentra SE. I was then going to buy the KYB AGX shocks. Maybe lowering 2'' if more trouble than it's worth so let's say 1.5"...or so. Do you think that this combo will be ok? I didn't know if those rates made for a monster of a ride or not. More or less my susp. sucks and I wanted to revamp it a little without spending big $$$. I just want a pretty firm ride while lowering the car a tad. I liked the cheap coil overs b/c I could level the front to match the rear and not have that wheel gap in front like most springs leave. Any sugges.? Help?
Thanks all!

I ordered a GC/AGX combo from GC directly and they recommended for my car (street driven) a spring rate of 350/300. I don't know how that rides yet 'cause its still in the mail (f*ckin snail mail!!!!);)

Originally posted by Calum
Just remember, you get what you pay for. At $100 bucks, you could afford to try them out I guess, wouldn't be out a whole lot of money, just time if (when? :P) you find you don't like them. I've got the GC/AGX combo with GC camber plates, 350 front 325 rear on my B13. I've got them set fairly low. They handle very nice, and the ride is ok. Honestly my 1st gen crx stock suspension is just as harsh. The only minor annoyance is on the interstate at the right speed the car will ocillate slightly.




Cool, Calum, how did you pick that combo? :)