Proper-length pushrods are also the key to creating correct valvetrain geometry. In short, with the right pushrod in place, the rocker-arm tip rolls from the intake side of the valve tip, across its center as the cam reaches midlift, to the exhaust side of the tip at full lift, then back to the intake side. It's a relatively simple measurement to take and implement, but it pays off in valvetrain longevity and improved perrformance.
Cam cards come in a variety of configurations, but they all serve the same purpose, which is to tell you just about everything you should know when it comes to your cam: its lobe separation angle, intake centerline, each of the valve opening and closing events, valve lift, advertised duration, and duration at 0.050 inch. This Comp card refers to a hydraulic flat-tappet cam, so the valve adjustment spec shows zero; with a solid or solid roller cam, the lash setting would be shown. This card also reminds the installer that new valvesprings will be needed for this 'stick to work properly; a quick call to Comp with some cylinder heads specifics will yield a recommendation. CHP
GET THE HOOKUP
COMP CAMS
Memphis, TN
800.999.0853 · compcams.com
CRANE CAMS
Daytona Beach, FL
386.258.6174 · cranecams.com
CROWER CAMS & EQUIPMENT
San Diego, CA
619.661.6477 · crower.com
ISKY RACING CAMS
Gardena, CA
323.770.0930 · iskycams.com
JESEL INC
Lakewood, NJ
732.901.1800 · jeselonline.com
LUNATI
Olive Branch, MS
662.892.1500 · lunaticamshafts.com