July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Valve Spring

Compression Pressure @ Length (Without Damper)
Loaded 800.6 N @ 29.5 mm
(180 lbs @ 1.16 inch)
Unloaded 289.1 N @ 40.1 mm
(65 lbs @ 1.58 inch)

Service Limit
Pressure Loss @ Specified Height 10 % Loss @ Specified Height