Valve Spring

Free Length (Approximately) 48.4 mm (1.905 inch)
Number of Coils 7.82
Wire Diameter 3.86 mm
Installed Spring Height 38 mm (1.496 inch)
Spring Tension:
Valve Closed 338 N ±20 N @ 38 mm (75.98 ±4.5 lbs. @ 1.496 inch)
Valve Open 607 N ±30 N @ 29.75 mm (136 ±7 lbs. @ 1.172 inch)