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i4 performance upgrade

objectives 

• 85 bhp/litre @6800 rev/min
• EU IV emissions
• Minimum on-cost

project scope

• Performance simulation
• Inlet VCP implementation
• 2-stage VIS
• Performance development including:
  • Evaluation of 4-2C-1 and 4-2-1C exhaust configurations
  • Evaluation of secondary air configuration