Journal

ECU remap simulator

Engine calibration simulator of VW 2.0 TDi, BMM, 103kW aka ECU remap, or chiptuning - simulating common effects of changes to engine parameters. Almost half of values are simulated because we do not have a dyno cell like Banks Power. ECU remap simulator for VW 2.0 TDi, BMM, 103kW (click [...]

101 – Stop wasting your energy and time

You are desperately searching Internet for common questions like "How much is maximum boost of my turbocharger" or "what is max. IQ/duration of my injectors" and came across various forums where you find some, what you believe, useful information. But everybody has got own opinion, and they usually contradict with [...]

BHG – Safe & simple ECU remapping guide

This article is part of the infamous BHG guides. The simplest and “safest” engine calibration (ECU remap) guide for beginners. Stop wasting your time, we will do "all" for you.Get more than €10,000 knowledge for a fraction of its value + no repair bills for common turbocharger and clutch damage [...]

BHG – How to find optimal air-to-fuel ratio for your TDi

This article is part of infamous Brutally Honest Guide to car hacking. Our fist air-to-fuel article has been met with great outcry from duners, chiptuners and other forms of tExperts desperately defending their truth. No matter what facts you present, people love to hear only what they believe is true [...]

BHG – How to find out maximal boost of your turbo

The Ultimate Question in (tuner's) Universe - How much boost is too much boost? How much boost should I run? How much boost my turbo can take? You name it...you asked in various forums but they just told you +/-6% is ok - is it really? In the beginning - [...]

ECU remap guide for beginners – HOW TO NOT destroy your car

Right now, I'm preparing third version of ECU calibration data for latest car Skoda Hilda HR I (full ECU remap history). Two years of intensive studies, following masters and hours of testing on alpine roads...I'm looking back what I used to do wrong as beginner and what sort of disillusion [...]

Warning

Warning KNOW IS DO - if you must think you have no idea what you are doing !!! HUMANOIDS DO NOT LIKE FACTS - what they desperately seek is a reassurance of what they believe is truth. THIS IS WEBSITE IS ABOUT HARSH REALITY - we don't care about truth, lies, [...]

Brake system issues

I have spent so much time on the brake system that I can do it drunk, and in sleep. There are common issues I have faced with factory floating calipers, ABS. Surface thermal cracks on Brembo Xtra (09.9145.1X) discs PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS [...]

Worn MAF (Mass Air Flow) sensor

Boost doesn't matter, without air in the engine there is no combustion. There is no way to precisely measure air content inside the cylinder - that's where MAF modelling comes in. But if there is crap in, there is crap out. PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU [...]

Turbo – Sticky vanes

So-called sticky vanes is a common disease of poorly driven/maintained VNT/VGT turbochargers in TDi engines. There are many causes, but most of them lead to car seat !!! Turbocharger - sticky vanes carbon deposits PLEASE READ WARNINGS BEFORE YOU PROCEED !!! IF YOU FIND INFORMATIONS USEFUL, PLEASE CONSIDER DONATION. Summary [...]

Over 5 years driving with Protlum Sport (review)

Suspension setup on Fabia HR II was lots of fun. With new kid in the garage Hilda HR I, question was "Can we do it better?" With Hilda HR I now retired - life can be understood only backwards - let's do real life review. PLEASE READ WARNINGS BEFORE YOU [...]

HR Academy

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. [...]

HRa – Do not learn, understand!

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 [...]