Diesel Tuning Fundamentals

Learning how to tune diesel engines has been notoriously difficult. The diesel tuning industry is unique as there’s no formal qualification path you can take that will make you a recognised diesel tuner. This makes it hard if you’ve got an interest in diesel tuning and want to learn more. It also means that many of those tuners out there in the industry right now don’t have a proper understanding of what they’re doing and the results are predictable - Poor engine performance, terrible driveability, and of course, needlessly damaged engines.

Modern diesel engines already offer impressive power and torque in many instances straight off the show room floor, but it’s what these engines can deliver with some basic modifications to the factory tuning that is really exciting. It’s not uncommon to see improvements in power and torque of more than 25% without even making any mechanical changes. Like any engine though, unlocking the potential from a diesel engine while ensuring the engine remains reliable requires in depth knowledge of the principles behind diesel operation, as well as how the tuning parameters affect the engine.

The Diesel tuning fundamentals teaches you the core principles behind the operation of a common rail diesel engine. You’ll learn how the diesel engine operates, how the combustion process occurs, and how engine torque is controlled by the fuel delivery. You’ll learn how a modern common rail diesel fuel system works and in particular how the fuel pressure affects the engine’s performance. You’ll learn about injection timing and see how this affects both performance and emissions. With emissions becoming increasingly important, you’ll also learn about the emissions from a diesel engine and see how these emissions can be dealt with, both with hardware such as EGR systems and Diesel Particulate Filters, as well as how the Nox emissions and exhaust smoke are affected by our tuning changes. You’ll also learn about pilot injection events and see how these can be used to reduce that knocking sound that diesel engines are so well known for. In each instance you’ll also see the concepts being demonstrated in real time on our dyno to really reinforce the topics being taught.

This course isn’t specific to any particular engine or any particular ECU. Instead it focuses on the core principles that are applicable to any engine and ECU. Understanding these will allow you to apply your knowledge regardless what type of diesel engine you’re personally interested in. So regardless whether you’re reflashing the factory fitted ECU in your Ford powerstroke or GM Duramax, or you’ve fitted an aftermarket diesel ECU to your Toyota Hilux, this course will be perfect for you.

What you will learn
  • Differences between petrol and diesel tuning
  • What AFR to target in diesel engines
  • Diesel emissions EGR and DPF
  • How to control boost
  • Why diesels smoke and how to limit it
  • Injection timing and operation
  • About diesel rattle and how to reduce it

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Course Curriculum

  • Introduction 01.51
  • How To Use This Course 01.53
  • Disclaimer 01.08
  • Comparison of Diesel vs Petrol Engines 06.32
  • Diesel Combustion Process 07.32
  • Diesel Knock 03.54
  • Pilot Injection Events 01.56
  • Pilot pulse vs diesel knock 06.46
  • Fuel System Fundamentals 04.10
  • Diesel Injector Operation 04.58
  • Air Fuel Ratio in Diesel Engines 03.43
  • Effect of AFR on power and torque 08.58
  • Throttle body 02.26
  • Injection Timing 06.38
  • Effect of Injection timing on power and torque 11.43
  • Smoke Limit 02.42
  • Smoke Limit Practical 11.41
  • Fuel Pressure 04.46
  • Effect of fuel pressure on engine performance 06.42
  • Boost Control 04.48
  • Boost Control practical 05.07
  • Exhaust Gas Temperature 05.08
  • Effect of injection timing on EGT 07.30
  • Diesel emissions, EGR and DPF 05.15
  • EGR vs EGT and NOx 09.33
  • Glow plugs 01.39
  • Advantages of diesel vs petrol 02.45
  • Conclusion 03.49
  • Request Certification 00.06

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