1978-84 engines ¥ hydraulic ¥ valve springs required ¥ good split duration cam for 74-80 inch engineswith carburetor and pipes ¥ longer exhaust help cool engine ¥ power to 5800 rpm
Most cam designers concentrate on getting the most power in a particular RPM range and disregard valve train clatter and power band width. The designers at VThunder¨ pay particular attention to ramp design to keep our cams as quiet as possible and lobe design to maintain as wide a power band as possible. VThunder¨ cams are made from 6150 aircraft quality steel for ultimate durability and resistance to premature cam failure from metalfatigue. We heat treat our cams to provide a case depth that allows for long term use under extreme loads. With the aid of computer controlled machining centers, VThunder¨ cams are held to extremely precise tolerances.
| Gross Valve Lift | Lobe Lift | Duration @.053 | Valve Timing Open/Close | Lobe Center Line | Lobe Separation | Base Circle Radius | Tappet Lift @TDC | Valve Lift @TDC | |||||||
| IN. | EX. | IN. | EX. | IN. | EX. | IN. | EX. | IN. | EX. | IN. | EX. | IN. | EX. | ||
| .485 | .485 | .340 | .340 | 252 | 252 | 17/45 | 50/22 | 104 | 104 | 104 | .470" | .103" | .120" | .147" | .171" |