Dyno Cams Camshaft 308 Grind, Welded Lobe, GX390, Predator 420cc

The 308 is a great all-around cam. It features a wide powerband and great "pulling" characteristics. Upgrading the valve springs are mandatory. If your rules allow, upgrading to a billet connecting rod and flywheel is also mandatory. A carb with a 1.33" or 34mm venture is recommended. The use of big valves is highly recommended.
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: 7200
Spring Pressure (In / Ex): 48-50 lbs Dual Spring
Valve Lash (In/Ex): .003"
Ignition Timining: Pump Gas Not Recommended
110 Octane 32 Deg BTDC
Methanol 36 Deg BTDC
Compression Ratio: 12 to 1

Profile
Intake Exhaust
Open: 53.5 BTDC 91.0 BBDC
Close: 91.0 ABDC 55.1 ATDC
Lift: .308" .308"
C/L: 108.0 ATDC 108.0 BTDC
DUR @ 50: 244.2 Deg 244.6 Deg