![]() ![]() ![]() ![]() The master is then installed in the cam grinding machine to generate the shape of the lobes of the production cam.Ī shaft containing many cams that covert rotary motion to reciprocating (lifting) motion. See "GROSS VALVE LIFT."Īfter the design of the cam is computed, it is transferred to a precision template or master. This is the maximum distance that the cam pushes the follower when the valve is open. Usually a flat faced or roller companion to the camshaft that transfers the action of the camshaft to the rest of the valve train by sliding or rolling on the cam lobe surface. The concentric or round portion of the cam lobe where the valve lash adjustments must be made. The greater the area under the lift curve, the greater is the lift and/or duration at some point on the camshaft profile. The area under the bell shaped curve with lift on the vertical axis and degrees of rotation on the horizontal axis. Recommended RPM range with matching componentsĬam Timing: TAPPET Opens Closes Max Lift Duration Spring Requirements: Triple Dual Outer Inner On zero lash and theoretical rocker arm ratios.Ĭam Timing: TAPPET Opens Closes ADV Duration 900" BASE CIRCLE FOR LONG STROKE CLEARANCE. Part Number: 119661 Grind Number: HR-230/359-2S-12.90 IGġ957 1987 CHEVROLET 8 FAIR IDLE, PERFORMANCE USAGE, GOOD MID-RANGE TORQUE AND HP, 3600-4400 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. between early and later SBC, block s and the cams they require,and on big blocks theres similar issues, a mark VI cam is different from a MARK IV cam If your ordering any cam, be very sure you explain what year block and what cylinder heads will be used as there are differences in the cams. With randomly matched parts even if those parts are good quality. So they are reasonably sure the components they sell in the kit will work, that can,t be always assumed, keep in mind most manufacturers will have tested parts compatibility , The individually purchased components you individually sourced. ) from a single manufacturer as mixing parts, sources or brands,Īllows the cam manufacturer to void the warranty, even if the parts in the kit they sell are either identical or inferior to, Generally its best to purchase all the listed components in a cam installation kit (cam, lifters,valve springs, etc. specifications and clearancesīTW if your running a flat tappet cam INSIST ON A P55 core, to have it ground on as they are far more durable than the cheaper cores Keep in mind cam spec cards give you the intended valve spring load rate,seat diam. ![]()
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