GT2RS vs GT3RS
#17
Rennlist Member
Join Date: Feb 2006
Location: Wishing I Was At The Track
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Just wish the 2RS revved to 8k....
#18
I will try to do a couple of 100 mile drives back to back over the next few weeks to get a better comparison.
#20
Burning Brakes
991.2 GT2RS and GT3RS have exactly all the same suspension parts:
- Shocks are the same
- control arms are the same
- main springs and helpers, spring perches, camber plates, all the same
- wheels and tires, same
- steering rack and all hardware, same part#
- same brakes, calipers, rotors, brake pads, abs pump
- same anti-sway bars
The GT2 is heavier on the front axle , and plenty heavier on the rear axle, the two cars equipped with same options are around 150 lbs apart. Normally, on equal springs/shocks/bars, a heavier car would feel softer.
The Porsche factory videos clearly show which car handles better by looking at minimum apex speeds.
On paper (based on specs) the GT3RS should be the stiffer car due to its lighter weight, but there is one part missing from all of the above: What is inside the PASM controller? If Porsche applied different programming to both cars, there will be the final answer, and I bet Porsche made different programming due to weight difference, speed difference, acceleration difference, weight distribution. For me, the PASM controller doesn't make a difference, because I already tested 3 maps in the DSC V3 and all of them gave me better handling than the factory PASM controller, so I keep a nearly new 991.2 GT3RS PASM controller in my office to remind me that aftermarket tuners (TPC Racing) can outsmart the Porsche engineers on suspension tuning, Because 'Murica!!!
- Shocks are the same
- control arms are the same
- main springs and helpers, spring perches, camber plates, all the same
- wheels and tires, same
- steering rack and all hardware, same part#
- same brakes, calipers, rotors, brake pads, abs pump
- same anti-sway bars
The GT2 is heavier on the front axle , and plenty heavier on the rear axle, the two cars equipped with same options are around 150 lbs apart. Normally, on equal springs/shocks/bars, a heavier car would feel softer.
The Porsche factory videos clearly show which car handles better by looking at minimum apex speeds.
On paper (based on specs) the GT3RS should be the stiffer car due to its lighter weight, but there is one part missing from all of the above: What is inside the PASM controller? If Porsche applied different programming to both cars, there will be the final answer, and I bet Porsche made different programming due to weight difference, speed difference, acceleration difference, weight distribution. For me, the PASM controller doesn't make a difference, because I already tested 3 maps in the DSC V3 and all of them gave me better handling than the factory PASM controller, so I keep a nearly new 991.2 GT3RS PASM controller in my office to remind me that aftermarket tuners (TPC Racing) can outsmart the Porsche engineers on suspension tuning, Because 'Murica!!!
#21
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Join Date: Aug 2017
Location: Metro Atlanta, GA area
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#22
On paper (based on specs) the GT3RS should be the stiffer car due to its lighter weight, but there is one part missing from all of the above: What is inside the PASM controller? If Porsche applied different programming to both cars, there will be the final answer, and I bet Porsche made different programming due to weight difference, speed difference, acceleration difference, weight distribution. For me, the PASM controller doesn't make a difference, because I already tested 3 maps in the DSC V3 and all of them gave me better handling than the factory PASM controller, so I keep a nearly new 991.2 GT3RS PASM controller in my office to remind me that aftermarket tuners (TPC Racing) can outsmart the Porsche engineers on suspension tuning, Because 'Murica!!!
#23
Burning Brakes
Car puts more power down on exit than stock pasm, quicker rebound control on fast transitions, less lock on hard braking.
Timed laps and 1 or 2 drivers running stock pasm, dsc, back to stock pasm. Circuit Tools for analysis. Gains were better than my .1 GT3RS got with the V2, but I also got more proficient at tuning my own DSC maps. Lots of fun hours ion and out of track making improvements, and they are paying off.
Timed laps and 1 or 2 drivers running stock pasm, dsc, back to stock pasm. Circuit Tools for analysis. Gains were better than my .1 GT3RS got with the V2, but I also got more proficient at tuning my own DSC maps. Lots of fun hours ion and out of track making improvements, and they are paying off.