help me to understand cams

I look at Lift and duration as Time and opportunity. You want to fill the cylinder with as much air fuel mixture as you can, and you need to be able to evacuate that cylinder as well. A certain amount of overlap is good, the exhast valve open will help draw in your intake charge. Its a fine line. When you call a cam grinder, ask what the duration numbers are at.050 as well as .0200 that will tell you how fast the ramps are on the cam. The Lunati Voodoo cam i have now has fast acting ramps, but in the same breath its not going to beat the **** out of the valvetrain.

Your best bet is to sit down with your engine builder who should have a good grasp on this. Mine is awesome, we have sat down on every build i have done, and determined what the GOAL was to start??? Street car, race car, pump gas, race gas? How much HP would you like to have. Then pick all the parts accordingly.

Sorry but asking people on the internet what cam should i use wont really get you the answer you need. People can tell you their combo and what worked and what didnt work? But why throw good money after bad.