"Ion Nitrite" treatment for longest life (similar to British Tuftriding)
Ionized nitrogen is vacuum deposited onto the crank surface in an oven,penetrating .010 to .012 inch into the metal surface and changing the microstructureof the steel, surface hardness is doubled from 30 to 60 on the Rockwell scale, while fatigue life is increased by 25 percent.
Shot peened to reduce internal stresses
Generous Crank "Fillets" for strength and rigidity
Out-bounded Counterweight to lessen crank flex
Requires the use of MAP7063 stroker rods
Use of some rods and piston combinations may incur extra costs due to the cost of additional Mallory Metal
The 76-degree crankshaft can be used on pre-1971 models, but it requires that the crank be turned to fit imperial unit (inch) bearings. Please see product questions for a more in-depth explanation.
Cranks are balanced at 50-percent. If you forward precise bob weight, we can balance it for you. This must be supplied at the time of the order. We do not do any calculations.
This must be used in conjunction with a 76 degree electronic ignition, and 76 degree camshafts.
About crankshaft bob weight:
Bob weight is the amount of weight added to each journal before it is spun also known as dynamically balanced. It is calculated in the following manner:
Bob weight = (complete piston assembly +small end weight) X (balance factor) + (big-end rod weight + bearing shells)