mk2 GT3 dyno variances and age/fuel effects?
#17
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We made the dyno runs on chillindrdude's 997.2 GT3 for the original intended purpose of monitoring for any coolant leak in operating condition after we welded the coolant pipes, replaced hoses, clamps, and water pump. It was unexpected to us and chillindrdude that the peak power is less than what we typically see for this model car. A stock 997.2 GT3 on our dyno typically put down 375-385whp. Even though the power is less than expected, based on our experience we feel that there isn't anything wrong internally with the engine. We suspect a sensor signal causing offset of the ECU mapping. We advised running through the tank of gas on street and then come back for dyno at his convenience. At which time I will log the ECU data. We slipped up and didn't log data because were only testing for coolant leak with the cooling system and water pump at full flow. We want to follow through with this.
Regarding the bottom graph on the dyno screen, that's for intake manifold pressure(turbo boost) sensor. We had the same turbo car on the dyno before and after this GT3, so the operator didn't bother to change the template on the screen thinking of sneaking in a couple runs for this GT3. That dyno pressure sensor wasn't connected to the GT3, it was left open probably picking up some pressure from the fan blowing.
Regarding the bottom graph on the dyno screen, that's for intake manifold pressure(turbo boost) sensor. We had the same turbo car on the dyno before and after this GT3, so the operator didn't bother to change the template on the screen thinking of sneaking in a couple runs for this GT3. That dyno pressure sensor wasn't connected to the GT3, it was left open probably picking up some pressure from the fan blowing.
__________________
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
#19
Burning Brakes
Thread Starter
for the record, i am extremely satisfied with the level of service and follow-up throughout the entire work cycle.
I will be returning to TPC for the DSC box in the summer after some track time as is. Will redyno then.
I recommend Tom and his team at TPC without reservation
I will be returning to TPC for the DSC box in the summer after some track time as is. Will redyno then.
I recommend Tom and his team at TPC without reservation
Last edited by chillindrdude; 12-26-2016 at 05:45 PM.