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2.5 map question

Joshua Brebner

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hi im currently running link plus g2 ecu with 2.5 bar map sensor on my charade gtti, running dual stage boost 12 psi - 24psi, i understand 21-22psi is max for 2.5bar map sensor, what are the implications of me going past designated boost for map? it seems to run fine but more knowledge on this would be great.


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Hi Joshua,

Eventually the MAP sensor will stop reading more pressure (around 2.5 bar absolute) and even if your boost pressure increases, the MAP sensor will still read 2.5 bar. The implication is that your turbo is pushing more air through than it was at 2.5 bar, and your ECU will be supplying the correct amount of fuel for 2.5 bar, therefore your engines Air/Fuel ratio will start to lean out and there is the potential for engine damage.

Hope this clarifies things,


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