Callies Magnum Ls1 3.625 Stroke, 2.559 Mains, 2.100 Pins, 4340 APH31T-MG-58
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After years of service,Magnum crankshafts by Callieshave established themselves asone of the most durablecompetition crankshafts everproduced. Magnum crankshaftsare manufactured from ultrapure SAE 4340 steel. Calliesthen subjects this material tomultiple heat treatments,resulting in a crankshaft withunsurpassed wear and strengthcharacteristics. All Magnumcranks feature CalliesUltra-Case heattreatment.
Each Magnumcrank will have gun drilledmains and fully profiledcounterweights, regardless ofengine type. A typical 4.000"stroke Small Block Chevy willweigh less than 48 pounds.Magnum crankshafts areavailable for a variety ofengine types and can bemanufactured to your specificconfiguration.
Manycrankshafts arecounterweighted to offsetsimple balance forces detectedat main bearings 1 and 5 bytoday's precision balancers.Callies Magnum Mass Correctcounterweights have beenstrategically placed to reduceimbalance forces over theentire length of the shaft.The result is a crankshaftexhibiting superior bearinglife and minimalwear.
Materialdistribution over the rodjournal arms and criticalstrength generating regions ofMagnum crankshafts has beenenhanced as well. These slightdesign changes improve thestrength to weight ratio,ensuring each Magnumcrankshaft will have anextended fatigue resistantlife.