Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Valve Spring

Free Length 52 mm (2.03 inch)
Pressure Closed 338-374 N at 43 mm (76-84 lbs. at 1.78 inch)
Pressure Open 832-903 N at 32 mm (187-203 lbs. at 1.27 inch)
Installed Height:
Intake 45.2 mm (1.78 inch)
Exhaust 45.2-43.43 mm (1.690-1.710 inch)