Has anyone dyno'd a GT3 at higher altitude?
11-25-2014, 11:54 AM
#16
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If you attended all the sessions (morning, afternoon, car, and bike), the average cost per session would end up being something like $5 to $10 each.
11-26-2014, 04:33 AM
#17
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I had two GT3s after a Turbo that I had in my place in Mammoth Lakes. My place is around 8,000 feet.
Its a NOTICABLE drop off. In fact I thought I might need a Turbo but once down to 2000 feet not so bad. The way I would describe the feeling because even tho I am an engineer, I dont care about the math. Its WHAT DOES IT FEEL LIKE in comparison. The way I described it was it felt like going from a GT3 to a normal Carrera S. The feeling was the same in the 996(410HP) and the 997 (415 I think). Felt like I was in a normal C2S, just not snappy.
Its a NOTICABLE drop off. In fact I thought I might need a Turbo but once down to 2000 feet not so bad. The way I would describe the feeling because even tho I am an engineer, I dont care about the math. Its WHAT DOES IT FEEL LIKE in comparison. The way I described it was it felt like going from a GT3 to a normal Carrera S. The feeling was the same in the 996(410HP) and the 997 (415 I think). Felt like I was in a normal C2S, just not snappy.
11-26-2014, 02:20 PM
#18
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I had two GT3s after a Turbo that I had in my place in Mammoth Lakes. My place is around 8,000 feet. Its a NOTICABLE drop off. In fact I thought I might need a Turbo but once down to 2000 feet not so bad. The way I would describe the feeling because even tho I am an engineer, I dont care about the math. Its WHAT DOES IT FEEL LIKE in comparison. The way I described it was it felt like going from a GT3 to a normal Carrera S. The feeling was the same in the 996(410HP) and the 997 (415 I think). Felt like I was in a normal C2S, just not snappy.
On another note, how does the new car deal with Octane? We only have crappy 91 here, but at elevation it doesn't matter. Also the really high compression of this motor must help compensate. I wonder if these two elements don't set the GT3 in the range of that old calculation? Certainly elevation has a huge affect, but is it a constant for all engine types with varying compression and ECU programming?
For turbos, it's a no brainer. The vacuum cleaner just sucks in as much air as it can take!
11-26-2014, 07:20 PM
#19
Does anyone have dyno data on the new GT3 - many posts have indicated that 475 hp is on the low side but I have not seen any hard data to make that claim. To be honest having driven 7,500 miles in a TTS, I have no complaints about the GT3's power - torque below 4 or 5,000 is noticeably less than the turbo but it is still adequate for me; is 0.4 or 0.5 seconds 0 to 60 really important? Not to me. If the TTS has 560 hp, the GT3 is closer to 500 than 475 by the seat of my pants.
11-27-2014, 02:45 PM
#20
Pro
It's around 20%. I have a 991 gt3 in Denver and the power loss isn't that terrible. I moved from FL in September after I had already purchased the gt3. It's noticeable but it doesn't make the car unenjoyable.
High plains raceway is a GREAT track. Cheapest I've ever done and the track is fun. Elevation change, smooth and lots of run off.
High plains raceway is a GREAT track. Cheapest I've ever done and the track is fun. Elevation change, smooth and lots of run off.