MOD1 Grind, Tool Steel Billet, Clone 13HP
- 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.
- 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.
|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|
|Open:||42.0 BTDC||78.0 BBDC|
|Close:||83.5 ABDC||46.0 ATDC|
|C/L:||108.0 ATDC||108.0 BTDC|
|DUR @ 50:||247.6 Deg||247.6 Deg|