Welcome to the Hajes Racing Academy aka HRa. Here you find an index of all pages for 10 days challenge of uncovering all secrets of engine calibration that very few knows or dare to share. PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE CONSIDER DONATION. [...]

While nature is limitless, mechanical parts are not. Before you start with chiptuning, make sure you know the limits of your car. PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE CONSIDER DONATION. Changes are simpleChanging the engine parameters is easy, but do you know what [...]

Congratulation for finishing HR Academy. We gave you all you ever need to know. You already know more than 90% of chiptuners. Just check out what did you achieve so far. What do you want?You have to decide what to do next. I rather tune my car seat on curvy [...]

You are almost there. There is still one little detail what you could miss in the Stage 0 ECU remap. The devil is details, and this one can give you another +20% performance increase! PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE CONSIDER DONATION. Mystery [...]

Imagine an engine re-calibration where you gain 50% more torque/power without changing anything inside the ECU or the car itself. Good joke right? Yet, I really did it, and regularly beat much stronger cars on the road. PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE [...]

If you must advance SOI, you need larger injectors...PERIOD ! That is the whole secret what misinformed public refuses to understand. TDi direct injection - section view throughout the engine cylinder PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE CONSIDER DONATION. Dangerous gameAdvancing SOI is [...]