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

Valve spring compression pressure	Intake (N @ spec length	153 lbs @ 1.18 inch
	Exhaust (N @ spec length	153 lbs @ 1.18 inch
Valve spring free length (approximate)	Intake	1.84 inch
	Exhaust	1.84 inch
Valve spring installed pressure N @ spec. length	Intake	51 lbs @ 1.57 inch
	Exhaust	51 lbs @ 1.57 inch
Valve spring installed pressure N @ spec. length	Service limit	10% force loss @ specified height
Valve springs	Out of square limit	1%