Tvrzená kliková hřídel 1275cc era a mg turbo

Last genuine Rover 1275cc new crankshaft with 1.75″ big ends -this was tuftrided for use in turbos.Forging number CAM6581.A-series crankshafts are most definitely forged. But also cast. Thefinal shape is forged out of a cast billet. Pre A-plus cranks weremanufactured in a different way to the A-plus ones, but the end resultis a component with the same mechanical properties but very slightlydifferent chemical properties. Pre A-plus cranks went through three heatprocesses – first heated to red hot to forge the shape, second to hardenit and third to temper it. A-plus cranks were heated just the once toforge it, then left to air cool in a controlled environment. The latterwas done for no other reason than to cut the costs of manufacture.Despite this it was most definitely more than up to the job, witnessit’s use in the Metro Turbo engine, albeit in Tuftrided guise toincrease it’s fatigue and wear resilience, and used in many a highperformance and full race engine.’