I have TEIN coilovers on my FD. I have not yet confirmed which type they are, but the ride is stiff and most likely will not pass Hawaii Reconstructed vehicle inspection. The state requires at least 2" of suspension travel by physically pushing down on the car. I'm taking the conservative route and want to swap out with the closest to stock spring rate while maintaining the coilover set up. Any advice and where I can source these springs would be greatly appreciated. I've checked TEIN's website and they won't ship to Hawaii.

Thanks,

Ken

 

Would you gain any more travel if you were to raise your car?

 

wouldn't help

assuming its a typical 8kg/mm spring, someone would have a hard time pushing a 8kg/mm spring down 2 inches
8 kg/mm = 448 lbs/in
to push it down 2 inches the inspector would have to push with the equivalent of nearly 900 lbs of weight

anyway you don't have to use tein springs.

springs from any manufacturer will work as long as the dimensions are okay.

try eibach for instance
http://eibach.com/cgi-bin/htmlos.exe...05835100013943

 

Does a stock RX7 give 2 inches? I had blown suspension that was much harder and I've been thinking about finishing up my school in Hawaii, but I leave my car in Texas thanks to recon.

 

the fender will cave in pushing down that hard

 

You're ignoring the motion ratio between spring and wheel.

 

you're right

wheel rate = motion ratio^2 * spring rate * sin(spring angle)
rx7 motion ratio front: .6
rx7 motion ratio rear: .68

spring angles? i'm going to guess 75 degrees b/c i have no idea
front spring angle = ?
rear spring angle =?

spring rates? assuming standard coilover rates
front = 8 kg/mm
rear = 6 kg/mm

fwr = .36 * 8 kg/mm * sin(75)
rwr = .4624 * 6 kg/mm * sin(75)

fwr = 2.78~ kg/mm or 155.7 lb/in
rwr = 2.67~ kg/mm or 149.5 lb/in