Dyno Cams Camshaft MOD1 Grind, Welded Lobe, GX390, Predator 420cc
www.bullfrogmotosport.com

Dyno Cams Camshaft MOD1 Grind, Welded Lobe, GX390, Predator 420cc

$143.77
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The MOD 1 features the same characteristics as our 308, with the addition of making more top end power. Upgrading the valve springs, a billet connecting rod, and billet flywheel are mandatory. A carb with a 1.33" or 34mm or larger venture is highly recommended. The use of big valves is also highly recommended. The lobes are welded to increase durability, extending the life of this cam. Specs Engine: 390cc OHV Clone 13HP Recommended Class: Modified / Open Target (MAX) RPM: 7500 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: 12.2 to 1 Profile Intake Exhaust Open: 42.0 BTDC 78.0 BBDC Close: 83.5 ABDC 46.0 ATDC Lift: .310" .310" C/L: 108.0 ATDC 108.0 BTDC DUR @ 50: 247.6 Deg 247.6 Deg

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