Sean T

h&r race/sports
neuspeed race/sports
eibach pro's
??

Thanks,
Sean

Clark@turbo5.com

This is what I was told. Who knows if its accurate.

Neuspeed Race 650 and 550 (2 inch on sport. 3+ on non)

Neuspeed Sport 600 and 500

I was told that stock is 350 and 300.

Clark

A4agarwal

Will H&R sports or neuspeed sports be stiffer/better handling?

OverPSI

Spring rates on a progressive rate spring are a completely different ballgame from that of a constant rate spring.

With a constant rate spring (Eibach ERS, Hypercoil, ProFlex), the spring rate is the amount of weight it takes to compress the spring one inch. It is called a constant rate spring because the coil are spaced evenly apart.

With a progressive (or variable) rate spring(Eibach Pro, H&R/Neuspeed), the spring rate varies since the coils of the spring are spaced differently. By spacing the coils closer or further apart, you effectively change the spring rate. Different companies have different coil spacing on their progresive springs. This is the reason why a progressive spring's rate cannot be measured and compared from company to company.

Gravel

H&R no longer supplies springs to Newspeed. They have not for years..