Spring rate of LS2 springs?

[blackbombshell95]

I need to know the spring rate on a LS2 valve spring. open and closed.

[geoffinbc]

Thats not spring rate. Spring rate is a constant. You are looking for open and closed force.
Valve Spring Load - Closed 340 N at 45.75 mm (76 lb at 1.8 in)
Valve Spring Load - Open 980 N at 33.55 mm (220 lb at 1.32 in)

The maximum spring rate is 50.64N/mm which is a constant on a straight spring but is actually only the maximim on an LS2 spring bcause of its behiveshape.

[blackbombshell95]

thx

[project60degree]

what is their max lift?

[RacerX11]

Depends on installed height.

[v6h.o.]

LS2 springs are the exact same springs as LS6- same part number.