I am looking at a set of Ground Control coilovers with Koni yellow shocks for my 2000 GSR. I'm not sure what spring rates to go with. This is my daily driver. I dont mind a stiffer ride, but I dont want bouncy at all. I'm not interested in lowering the car much. I also like to drag once in a while. Any suggestions on what spring rates to go with?

 

Bouncy is entirely dependent on the shock used. If the shock can adequately damp the spring, it won't be bouncy.

Not lowering much, and only drag once in a while, anything from 350 to 500 up front and 250 to 400 in the rear would be fine. Koni Sports (Yellows) can handle up to 500 lbs/in rates just fine, though some have reported 550 or 600 as still being adequately damped (at or near full stiff on the shocks).

Rear rate determines more of the ride quality than the front. The front is more lacking in suspension travel, so go to the stiffer side if you want to lower more. Drag squat is determined by rear rate, so stiffen the rear based on how much ride quality you are willing to trade for drag launches.

 

Thanks, this is the info I was looking for. I'm leaning towards 450/400

 

400/400 on my 2000 GSR. Somewhat stiff for daily use, but acceptable. Slightly too soft for auto-x and HPDE use, so I'm going stiffer soon. That's part of the joy of GC sleeves, springs are easy enough to change, so don't worry about wanting different rates later.

Just don't try and slam the car. It won't be stiff enough to tuck tire up front.

 

I have koni/GC's on my integra, and the fronts are almost all the way up, and it still seems to bottom the shock out. Why is this?

 

Spring rates?
Stock bumpstops, or cut down bumpstops?
Extended upper shock mounts?
Shock fork trick for additional shock compression travel?

 

Bumpstops are completely demolished. I bought them off of a friend who said they were just stock rates. They also didn't have any markings as to which were front and which were rear. Everyone on here says their koni/gc setup rides smooth, mine rides like a straight racecar.

 

That's because "smooth" is subjective. My car rides smooth, when the road is.

No markings needed for front or rear, as you can run whichever springs you want at either end.

Stock rates, meaning what GC ships by default? I believe those are something like 430/380 for an Integra (if my memory serves). Compare that to the 220/110 rates an Integra leaves the factory with (again, if my memory serves), and you'll understand why it rides like a race car (rear rate is over 3 times stiffer than stock).

Get your car up on jackstands, remove wheel, use a jack to lift the suspension to ride height, and see how much suspension travel you have left. If it looks to be too little, it probably is, and you'll need to find a way to create more travel (shock fork trick, extended upper shock mounts, riase ride height).

GC sells new bumpstops if you need them. Or you can use junkyard pulls and cut them down to halfsized.
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