How does ScienceofSpeed build stroked engines?
A billet crankshaft is manufactured specifically for the NSX that replaces the factory crankshaft to offer an increased stroke over factory. It is important to realize that the crankshafts that are used are custom made from billet stock, heat treated, and precision ground to exacting specifications. The crankshafts are not reground factory crankshafts with smaller rod journals like offered by other NSX tuners from Japan. The billet made crankshafts are exceedingly high quality used in applications producing more than 200 hp / cylinder and offer an excellent alternative where low volume makes forging unfeasible. In addition to increasing the stroke of the engine we also increase the bore in most applications allowing greater surface area for the combustion force to act on. Custom built forged pistons allow the factory forged titanium connecting rods to be used for naturally aspirated built engines while billet rods are available for forced induction applications. The materials used, tol
