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EVOMS Lightweight Billet Crankshaft
EVOMS Lightweight Billet Crankshaft


 
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Our Price: $5,995.00

Product Code: ENGCNCCRNK


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Description
 
Evolution MotorSports CNC Machined Billet Lightweight Crankshaft
For 996/997/997.2 GT3 & 996/997 Turbo Engines

Since we have already developed a 102.6mm 3.8L & 104mm 3.9L larger displacement conversion for the 996/997/997.2 GT3 and 996/997 Turbo engines, we decided to take the next step and build 4.0L and 4.1L conversions. Our 104mm bore 3.9L conversion was designed specifically for the normally aspirated GT3 engines and our 102.6mm bore 3.8L conversion for the turbo applications. In order to further increase the Turbo engine's displacement beyond 3.8L, while maintaining the strength needed for a high power turbo application, we needed a longer stroke crankshaft to complete the conversion. In typical EVOMS fashion, building just a longer stroke crank would not suffice. We had once CNC machined from bill 4340 high alloy steel, and used technology commonly found in 12,000rpm race engines. Our lightweight race crankshaft has been engineered using technology from top level competition engines and incorporates features that go well beyond that of the OEM specifications. Listed below are some specifications that went into building this work of art. Performance... Engineered and EVOLVED



Evolution MotorSports Billet Crankshaft Information:
  • Engineered and manufactured to standards that surpass OEM quality and design
  • Machined to competition specifications for unparalleled performance
  • Knife edged counter weights for improved rotational aerodynamics
  • Direct replacement 76.4mm stroke, and 80.44mm increased stroke applications available
  • Varying rod journal widths available
Technical Specifications:
  • CNC Machined from billet 4340 high strength alloy steel
  • 2-stage ion-nitride hardening process
  • Controlled Displacement Micro (CDM) polished
  • Multi-rate rod journal oiling system
  • 12 radially profiled counterweights
  • Lightened & dynamically balanced counterweights
  • 80% higher tensile strength vs. OEM crankshaft
  • ~12% lighter than OEM crankshaft
  • Capable of withstanding well beyond 10,000 RPMs


Conclusion:
When we set out to engineer and produce a billet crankshaft we began with a zero restriction, ground-up approach for ultimate quality without any compromises. Besides creating a lighter and more durable crank, we incorporated features which make them on par with race engines that are built on $1m+ budgets. Our engineering and manufacturing process is second to none, and the quality we put forth to have these produces is a first for the Porsche aftermarket.

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