Does anyone know the springs with the highest rate. I am looking for around 500lb front and rear. Its looks like I would have to go to a coilover for those rates. Just curious if anyone made a set.

 

500lb? Thats hardly anything.

 

If you can find them still, the Nismo T2 springs have springrates of 625F/700R. Don't even think about running them with stock shocks though. Revalved koni yellows are probably your best bet

 

I know how, far bigger issue however relates to controlling the spring, I sent you a detailed pm on shock option's.

For Koni or Bilstein based shocks you can purchase 1/4" thick 6061 aluminum and make your own front spring seats, which is what I did. This will allow you to purchase Tein tapered springs in your choice of spring rate. This also avoids issues with what upper mount to use since the Tein tapered springs are sized to reuse the oem upper shock mount. For the rear, purchase one of those $109 ebay coilover kits. The rear adjustment system works well and the rear springs in the kit happen to be 500lbs in rate. Want to use a different rear rate with the kit? All you do is buy Eibach ESS springs 5" inside diameter and 9.5" in length. The only modification you do is to cut just enough of the end of the spring off so they will sit in the rear lower control arm.

 

thanks for the help. is this the ebay one

http://cgi.ebay.com/ebaymotors/03-04...mZ250312529247