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Old 04-25-2015, 07:38 PM
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Join Date: May 2002
Location: Mission Viejo, CA
Cobra Make, Engine: Kirkham, 427 side oiler
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It's a Comp Cams 33-000-9 which probably doesn't help. I can provide the grind card if more info is required.

Gross Valve Lift: Intake: 0.645", Exhaust, 0.635"

Erson Lifters 1.76 ratio

Lob Lift: Intake 0.3670" Exhaust: 0.3610"

Intake 0.367" * 1.76= 0.645"

Exhaust 0.361" * 1.76= 0.635"

That seems to be the right calc since the result equals the gross valve lift. This cam must have been ground for 1.76 ratio rockers?
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