ECU – Electronic Control Unit
- Adjusting this will change the engines power output across the entire RPM range.
- Lowering the ECU also increases fuel efficiency.
Power Restrictor
- Restricts peak horsepower but does not affect torque in the lower RPM range.
- Lowering the Power Restrictor moves the power band across the RPM range.
Conclusion
If you’re in an endurance race then adjust the ECU first. If fuel is not an issue then try the Power Restrictor first.
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