Further developments in starting systems were related to coupling between starter pinion and flywheel. In distinct innovation,Valeo developed integrated starter alternator technology, where alternator works as starter motor that eliminates need for another electric motor and resulted in improved performance in criteria like weight, fuel consumption and emission of system .(16) Further Innovation in a great amount of starting devices was proposal and analyzed, including springs, compressed air, hydraulic and inertial starter engines. Only in 1910 batteries with enough capacity of storage had started to be produced, making feasible the use of electric motors as starter motors. The basic project of the starter motor was elaborated a long time ago. In market, nowadays, there is a continuous necessity for improvements in the performance and reduction of cost. The sum of these factors is the incentive for this project. (14) A new methodology found to circumvent this issue and it is, by evaluating the strain experienced by the pinion and drive mechanism, engine starting torque demand can be evaluated at any temperature. By this process, starting system design can be made to suit the correct requirements of the engine starting (12)