The Myths And Truths Of Remapping

Gasoline / Petrol Stage 1234+ Tuning

 

FACT - Its a load of non-sense, its either tuned correctly or not.

Usually started from vehicle owner forums run/owned/funded by tuning companies thus pushing 'sponsors' -- pushing the myth that every time an extra piece of hardware is installed on the engine, then a calibration adjustment is required. To a certain degree this is true when you get to high levels of modification. In the eyes of the general public, this poses a grey area between the stage 1 and 2 ++ tune calibration. On a modern torque based petrol ECU, the fitting of the following requires NO further modification;

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• Full exhaust system with Decat

• Cold air intake system or air filter replacement

• Inter-cooler upgrade

• Basically anything that improves airflow and/or lowers intake temperature into and from the engine.

 

The truth of the matter is, a correctly calibrated ECU will be able to deal with the extra air or air at a higher relative density (cooler) thus adjusting fuel and advance trims accordingly (adaption). This is where people assume, that having all of this hardware fitted they require further adjustments.

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It has should be noted that some companies offer stage 1 and 2 tunes to completely stock vehicles. After years we are still waiting for some one to explain what the difference is.

The requirement for a further calibration would be hardware such as;

• Upgraded much larger turbocharger

• Upgraded injectors / fuel system

• Larger MAF or modification to run on MAP alone (Alpha N)

• Basically anything that requires re-calibrating or re-scaling from standard production sensor curve (input)

 

Even then how this falls in the the mythical stage scale is yet to be seen. ITS EITHER TUNED CORRECTLY OR NOT.