Cam card specs meaning

The reason the comp cams numbers are off is because they are based on advertised duration and the hughes and lunati are for duration at .050 lift.The numbers at .050 for the comp cam are intake opens 9.5 btdc/ closes 41.5 abdc exhaust opens 52.5bbdc/ closes 4.5 atdc based on a 106 installed center. Always go with the spring with the seat and over the nose pressures that are recomended by the cam company.