G Force Performance chip

These chips are bogus. Its a old trick from back in the day. The intake air temp IAT is a resistive sensor that changes with the air temperature entering the engine. When the air is cooler it is also denser and changes the ECU fuel curve to compensate for a more oxygen rich mixture. You can pretty much get the performance from this chip by placing a resistor in line with the IAT sensor. If you measure the resistance across the IAT at different temperatures you can come up with a linear graph of temperature vs resistance. Just add the resistance for the temperature you would like to simulate.

With my experience this mod really doesn't make much difference.
 
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