1115 W Fairmont Dr
Tempe, Arizona-85282, USA
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Scienceofspeed Billet Stroker Crankshaft

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Advanced custom designed billet steel stroker crankshaft replaces factory 78mm stroke crankshaft with a billet crankshaft allowing an 86-88mm stroke for an increased displacement of 3.4-3.8L. Designed specifically for the NSX block using Honda NSX main and connecting rod bearings. Precision cut and dynamically balanced. Proprietary bob-weight design for minimal friction loss. Maintains factory oiling system for journals. Bolts directly to factory crankshaft pulley and flywheel. Bearing selection and block clearancing required for installation. We recommend a capable engine assembly facility for engine building. ScienceofSpeed offers a complete in-house custom engine program. Please click here for details.

In conjunction with the billet crankshaft, a custom piston design was developed to maintain a rod ratio as close to factory as possible with the increased stroke and reduce rotating mass as much as possible for high RPM performance and durability. Rotating mass of EACH piston set and connecting rod drops nearly 100 grams in total over factory components. This piston includes a special high strength lightweight piston wrist pin that is compatible with the factory connecting rod for naturally aspirated engines. Turbo/supercharged induction engines will require a custom billet connecting rod. Piston available in 90-95mm diameter & various compression ratios.

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