The Tuning Bible

Fourteen parts, in plain English, with the diagrams that make it click. Start at the beginning, or jump straight to the engine you own.

Part 01How an Engine Makes Power - Air, Fuel and KnockThe ground floor of tuning: the four-stroke cycle, why air is the real ceiling on power, what boost and mixture actually do, and knock - the enemy every tuner fights.
Part 02ECU Maps Explained - How a VAG ECU Really ThinksA map is just a lookup table. What KFMIRL, LDRXN and KFZW do, why a VAG ECU thinks in torque rather than boost, and what changes between a stock and a Stage 1 file.
Part 03Stage 1, 2 and 3 Explained - What Each Stage Really MeansWhat a Stage actually is, what hardware each one assumes, the power to expect, and why you cannot simply turn the boost up to maximum.
Part 04Fuelling and Hardware - What to Buy, In What OrderThe upgrade order that actually works, where the fuel system runs out, and the cooling, breathing and strengthening parts that keep a tuned engine alive.
Part 05VAG Engine Index - 1.8T, 2.0 TFSI, 2.7T, TDI and MoreEngine-by-engine cards for the Audi and VW engines people tune: the power on tap, the ECU inside, the weak points to respect, and a master comparison table.
Part 06Knock and Datalogging - How to Tune Without Breaking ItKnow your enemies: knock, lean-out and heat. How to datalog properly so you tune on proof rather than vibes, plus the first-timer's golden rules.
Part 07Reading a Map - Files, Tools and Learning By DoingCompare a stock file against a modified one, the tools tuners actually learn on, where to get files, and the legal and ethical line you do not cross.
Part 08VAG ECU Platforms - ME7, MED9, MED17, EDC15 and EDC17Which Bosch ECU is in your car, what each platform can and cannot do, how they are read and flashed, and which are locked.
Part 09How to Datalog a VAG Engine - And Read the ResultWhich channels to log, what a healthy pull looks like, and how to spot timing pull, lean-out and boost droop in your own data.
Part 10Gearbox Tuning - DSG, S tronic and Torque LimitersWhat a DSG tune changes, where the torque limiters live, and why the gearbox is often the real ceiling on a tuned car.
Part 11The VAG Immobiliser Explained - Immo, SKC and Component ProtectionWhat the immobiliser actually does, where the secret lives, what an SKC is, and why component protection stops a swapped module from starting.
Part 12Fault Codes Explained - Reading a DTC ProperlyThe anatomy of a VAG fault code, why a P-code rarely names the broken part, freeze-frame data, and how to tell a real fault from a symptom.
Part 13Tuning Dictionary - Every Term, In Plain EnglishAn A-to-Z of the words tuners use: from lambda and duty cycle to KFMIRL and MLHFM, each explained without jargon.
Part 14Tuning Reference Tables - Units, Conversions and Safe LimitsThe reference tables worth keeping: unit conversions, typical safe limits, and the numbers to sanity-check a tune against.

Read it, then do it

Everything in this chapter is something VAGPULSE does on a real car: read the ECU over OBD, see these same maps by name, and flash a checked file back with your original saved first.

See VAGPULSE