Hi all,
I did a search but didn't find much about what spring rates should be used for different scenarios. So I figured I would just ask. I'm mostly street driven with occasional DE or autoX event, Along with Some spirited mountain driving as well. I'll also be doing some roll race events too. So what is a good compromise of handling and comfort? I don't want a jarring ride over these shieety CO roads, they need to soak up a little bit of that.

My initial thought was
7kg/10kg = 392/560lb f/r

Now I'm thinking:
8.5/12 = 476/672 f/r

Thanks!
Scot

 

i have 600/800 on my jrz coilovers

 

How's the ride Stephen? Is that more of a track focused rate?

Well hopefully the rates I chose are in the middle then.

 

your initial thought on rates is probably good

 

fairly stiff. but then i have all gmg adj links and sways as well. the car came with close to 18k$ in suspension mods when i bought it. i have just freshening up heim joints and had the coilovers rebuilt last yr. at 160 mph plus the car feels rock solid

 

Much of the comfort will come from your shock settings. Pair your springs with a good two way adjustable coilover shock, especially one with dual flow valves for high speed and low speed bumps like KW V3, Clubsport, and you'll have no problem getting the comfort even with 600/800 lb springs.

 

Scott,
It's not a clear cut answer. The quality of the shock will determine how stiff you can run your springs. With good single adjustable shocks you'll be able to run 700/800 on the upper end. Motorsport type reservoir shocks can go much higher as they move a lot more fluid. I run 1400/1500 which is not very street friendly unless roads are relatively smooth. You rode in my car with these at the track. Same shocks with 1000/1100 and compression dialed back are downright cushy however, much softer than my previous single adjustable JRZs with 700/800 rates. What shocks are you running?

 

I was thinking about trying a set of ceika remote reservoir shocks with 11/14kg springs.

Being a guy thay used to own a shock company (all motorsports, very little car stuff) I find that what most shocks lack overall is they do not have enough rebound damping. Thay is what creates the bouncy feel you get from many shocks. That is something to consider when ordering custom valving. Have a suspension slightly pack instead of being bouncy give you a much more planted feel and gives more confident to the driver.

 

+1 on dampening being extremely important to the compliance/NVH/'ride',
However, the spring rate is still the spring rate, and the kind of environment (road/track surface) is important to consider...ie a road with small sharp bumps vs a road with smooth but large undulations... a very stiff spring with good dampening works fine on small sharp bumps, but will toss the car around hard on a 'whoopy' road