Dyno Cams Camshaft 275 Grind, Welded Lobe, GX390, Predator 420cc

This cam is used in mild modified applications. It will require an upgraded spring package, billet rod, and billet flywheel. The lobes are welded to increase durability, extending the life of this cam. 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