HPAcademy EFI Tuning Fundamentals

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EFI Tuning Fundamentals teaches you the core principles behind the engine operation, as well as the operation of the ECU. You’ll learn how the engine produces power, why it requires a specific amount of fuel, and how to decide what the optimal ignition timing is using the dyno. You’ll also learn how compensation tables work in the ECU and how to configure them correctly. You’ll learn how interpolation works in the fuel and ignition tables and learn how to correctly configure your tables for maximum accuracy without making more work for yourself.

This course will let you tune with confidence - With the knowledge from this course, you’ll be able to correctly calibrate the fuel and ignition timing even on engines that you’re tuning for the first time. You’ll be able to tune faster and more accurately while ensuring you retain engine reliability. While many tuners rely on the trial and error method of making adjustments, this course teaches you techniques that allow you to quickly and confidently dial in your tune without any guesswork.

EFI Tuning Fundamentals isn’t specific to any particular engine or any tuning software. Instead, it focuses on the fundamental principles that are applicable to any 4 stroke, gasoline engine. So regardless whether you’re reflashing the factory PCM on a naturally aspirated LS3, or you’re tuning a Honda K20 fitted with a turbo and a standalone engine management system, or any other combination for that matter - This course contains essential knowledge you need to know.

This course is theory-based, and while several examples are demonstrated on the dyno to help reinforce the concepts being taught, it won’t teach you how to perform your tuning on the dyno or the road. We offer this knowledge in our practical tuning courses, and they are the perfect accompaniment to this EFI Tuning Fundamentals course when you’re ready to start making your first tuning changes.

 

WHAT YOU WILL LEARN
  • How an EFI system works
  • Essential EFI Components
  • How to optimise the Ignition Advance
  • What is Airflow and Volumetric Efficiency
  • How to choose the correct Air Fuel Ratio
  • Fuel and Ignition Table Resolution

 

Course Curriculum

GETTING STARTED
Introduction
How To Use This Course
Disclaimer


ENGINE PRINCIPLES
Engine Principles
Valve Timing Events
Pressure Volume Cycle
Volumetric Efficiency
Standard Conditions
Absolute vs Gauge Pressure
Air Density
Mass Flow vs Air Flow


AIR FUEL RATIO
Air Fuel Ratio
Brake Specific Fuel Consumption
Choosing The Correct AFR
Lean Tuning Myths


FUNDAMENTAL ELECTRONICS
Fundamental Electronics
Wave Forms


EFI COMPONENTS
Trigger Inputs
Load Calculation
Intake Air Temperature Sensor
Engine Coolant Temperature Sensor
Throttle Position Sensor
Oxygen Sensor
Knock Sensor
Digital Inputs
Ignition Drives
Injector Drives
High and Low Impedence Injectors
Auxiliary Outputs


ENGINE MANAGEMENT SYSTEM TABLES
Fuel and Ignition Tables
Fuel Models
Table Resolution
Compensation Tables
Acceleration Enrichment
Reflashing a Factory ECU
Continuously Variable Valve Timing


FUEL INJECTORS
Injector Deadtime
2d vs 3d Injector Deadtime Compensation
Injector Flow
Injector Sizing
Short Pulse Performance


HOW THE ECU WORKS
The Speed Density Principle
Calculating Mass Airflow
Calculating Fuel Mass Flow
Calculating Cycle Time
Calculating Injector Pulse Width
Correcting your AFR


THE TUNING PROCESS
Tuning Ignition
Tuning Fuel Delivery
Understanding Knock


TUNING YOUR ENGINE
What You Need To Start Tuning
Tools of the Trade


FINAL CONCLUSION
Final Conclusion
Furthering Your Knowledge