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Stage III Engine Management System
Stage III EMS
RetroTek Speed’s Stage III EMS (Engine Management System) sets a new standard for performance and ease of installation coupled to the most compact size of any aftermarket EFI EMS. Powerful and compact, this system can be used for full control of port or throttle body fuel injection systems. Featuring adaptive learning capabilities, onboard wide-band control and integrated 2.5-bar Map sensor, the Stage III EMS has the power and performance of systems three times its cost. Comes complete with dashboard software for easy analysis and custom tuning and a step-by-step installation / user manual.
Stage III Features
• Adaptive Learning. Meaning it will learn on the fly and adjust to the desired air fuel ratios automatically.
• Fully scaleable MAP & RPM boundaries
• Drivers for 8 high or 2 low impedance fuel injectors (G.M. TBI applications)
• Intuitive VE based mathematics
• Works with 4, 6, or 8 cylinder applications
• 2.5 Motorola Map Sensor internally mounted for NA motors or Boosted applications up to 22 P.S.I.
• Internally integrated Fuel pump relay
• Programmable fuel system priming
• Onboard Wide-Band control for Bosch O² sensors
• Uses standard GM / Ford sensors
• GM based Idle Air Control Motor compatibility
• On the fly programmable through 30,000 RPM
• Fully potted electronics makes the EMS water and vibration proof
• Operational temperature range of -20° to 225°
• Compact billet designed housing made from 6061-T6 aluminum
• Requires no modifications (cutting or drilling) to the firewall
• Wizard style setup allows for custom selection of camshaft profile, injector size, intake manifold design, and engine torque
• Programmable 441 cell resolution in pulse-width mode or infinitive resolution in formula based mode
• Full data logging capability in live histogram viewing
• Controls fuel only, no spark control (see Powerfire ignition for spark control)
• Knowledgeable technical support team

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