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I'm running the injen for the fn2, tdi north tested on my car! It defo needs mapping, but other than that it's all good. I went back a couple of weeks later and was asking about the mugen, paul said to me this kit is just as good or better than that for gains!
 

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I'm running the injen for the fn2, tdi north tested on my car! It defo needs mapping, but other than that it's all good. I went back a couple of weeks later and was asking about the mugen, paul said to me this kit is just as good or better than that for gains!
Did he then!!!!
 

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I'm running the injen for the fn2, tdi north tested on my car! It defo needs mapping, but other than that it's all good. I went back a couple of weeks later and was asking about the mugen, paul said to me this kit is just as good or better than that for gains!
Can you explain *why* you'd need mapping?
 

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Cockup Specialist
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Can you explain *why* you'd need mapping?
Because the MAF sensor expects to sit inside a specific internal diameter tube.
And if the tube is too short turbulence upsets the readings.

The Tube and the sensor together give the voltage which is translated to airflow readings in the ECU.
Changing the tube changes voltage relative to mass airflow.

Basically the MAF sensor must be recalibrated.
 

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*that* is good reason.
However, many people will falsely say 'because it can suck in more air' :)
 

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quotation marks FTW
 

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The Property Man
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Because the MAF sensor expects to sit inside a specific internal diameter tube.
And if the tube is too short turbulence upsets the readings.

The Tube and the sensor together give the voltage which is translated to airflow readings in the ECU.
Changing the tube changes voltage relative to mass airflow.

Basically the MAF sensor must be recalibrated.
Thats the best explaination ive heard :)
 
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