Dyno Cams Camshaft 275 Grind, Tool Steel Billet, GX390, Predator 420cc

This cam is used in mild modified applications. It will require an upgraded spring package, billet rod, and billet flywheel. Tool Steel Billet cores are the best choice in high RPM applications. The two piece design of the Tool Steel Billet core allows you to advance or retard the cam to meet your application needs. Specs Engine: 390cc OHV Clone 13HP Recommended Class: Modified Target (MAX) RPM: 6500 Spring Pressure (In / Ex): 32 lbs Single Spring Valve Lash (In/Ex): .003" Ignition Timining: 93 Octane 28 Deg BTDC 110 Octane 32 Deg BTDC Methanol 36 Deg BTDC Compression Ratio: 10.2 to 1 Profile Intake Exhaust Open: 50.0 BTDC 88.5 BBDC Close: 88.0 ABDC 50.0 ATDC Lift: .276" .276" C/L: 108.0 ATDC 110.0 BTDC DUR @ 50: 239.5 Deg 238.8 Deg