It's very similar to most street performance cams. We know this will idle well and pull vacuum or GM wouldn't have put it in a factory ride. 480 then the lobes are moved around for whatever duration to set power band. If you look thru the cam catalogs for "RV" "Street Performance" small chevy cams. 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. Lift: Intake 3286 493 All Lifts are based Here is the 140 cam info in more detail, this is from crane who sells a copy of it: Here is a more complete list of SBC cams:Ĭhevrolet Factory Cam Specs by part number
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