So in our last segment of Project Porsche 911 GT3RS, we installed Dundon Motorsports long tube headers and exhaust and picked up 16 wheel hp and 7 lb/ft of torque from our cars hyper tuned NA 4 liter motor under less than ideal conditions. The car’s engine is super sensitive to intake air temperature and the ECU starts to dial things back if the intake temperature goes above 78 degrees.
We had done our baseline testing with cool intake air temp but our after header install intake air temps were in the high 70’s low 80’s, not good for optimal dyno results. With the headers and exhaust in place, we wanted to do some tuning to be able to extract the most out of them and to perhaps make our engine less temperature sensitive.
The tuning help came from our friend Mitch McKee. Mitch is one of Cobb Tunings ECU Engineers and he is very familiar with the workings of the Porsche ECU. Mitch was in town and we begged him to take a look at our car. Since the GT3 is so temperature sensitive and we wanted to do the best possible job tuning, We booked time at what is fast becoming our favorite dyno, World Motorsports Wind Tunnel.