GT2RS Clubsport vs 991.2 Cup Car
07-11-2019, 01:13 PM
#16
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This one is going to be closer, but it should go to the GT2RS ClubSport.
Mark Webber with a passenger crossed under the Pirelli bridge at Mount Panorama at 1:49.4 (the back straight). The 2016 qualifying record lap (by an FIA-GT3 McLaren) passes that bridge 4 secs before than Weber, but Weber was on press-day mode plus a passenger, while the 650S-GT3 was in full attack mode.
The FIA-GT3 car from Porsche is the GT3 Cup R, not the slower 991.2 GT3 Cup.
Road America favors big horsepower, and the last time, the GT2RS Street car was handicapped by the MPSC2 N2 tires. On the Cup2-R and driven by Dave Donohue, it went 2 secs faster, and not taking anything from Dave, but if I have to bet on a driver for a fast lap, my money will go to Sellers.
Here is some information:
991.1 GT3 Cup (Brian Sellers): 2:11.98 (Michelin Slicks)
991.2 GT2 RS (David Donohue): 2:15.17 (Cup2-R-N0)
991.2 GT2 RS (Brian Sellers): 2:17.04 (Cup2-N2)
991.2 GT3 RS (David Donohue): 2:18.57 (Cup2-R-N0)
The slicks would give a street GT2RS another 2 secs, placing it in the 2:13s. Now comes the big changes: The GT2RS-CS is not just a lighter GT2RS, it is also on a track suspension (not the compromised street/track suspension for the street car), and a massive Aero package. My guess is that on slicks, the GT2RS-CS will run a 2:09 at Road America, and I doubt the 991.2 GT3 Cup will touch under 2:10s.
Predicted laps (with Brian Sellers driving as awesome as he did last time):
GT2RS-CS: 2:09.18
991.2 GT3 Cup: 2:10.48
Mark Webber with a passenger crossed under the Pirelli bridge at Mount Panorama at 1:49.4 (the back straight). The 2016 qualifying record lap (by an FIA-GT3 McLaren) passes that bridge 4 secs before than Weber, but Weber was on press-day mode plus a passenger, while the 650S-GT3 was in full attack mode.
The FIA-GT3 car from Porsche is the GT3 Cup R, not the slower 991.2 GT3 Cup.
Road America favors big horsepower, and the last time, the GT2RS Street car was handicapped by the MPSC2 N2 tires. On the Cup2-R and driven by Dave Donohue, it went 2 secs faster, and not taking anything from Dave, but if I have to bet on a driver for a fast lap, my money will go to Sellers.
Here is some information:
991.1 GT3 Cup (Brian Sellers): 2:11.98 (Michelin Slicks)
991.2 GT2 RS (David Donohue): 2:15.17 (Cup2-R-N0)
991.2 GT2 RS (Brian Sellers): 2:17.04 (Cup2-N2)
991.2 GT3 RS (David Donohue): 2:18.57 (Cup2-R-N0)
The slicks would give a street GT2RS another 2 secs, placing it in the 2:13s. Now comes the big changes: The GT2RS-CS is not just a lighter GT2RS, it is also on a track suspension (not the compromised street/track suspension for the street car), and a massive Aero package. My guess is that on slicks, the GT2RS-CS will run a 2:09 at Road America, and I doubt the 991.2 GT3 Cup will touch under 2:10s.
Predicted laps (with Brian Sellers driving as awesome as he did last time):
GT2RS-CS: 2:09.18
991.2 GT3 Cup: 2:10.48
07-11-2019, 04:42 PM
#17
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A GT3R weighs a lot less and has a ton more sophisticated suspension...the 2RS club sport will be faster than the cup. Slicks, TCS etc type aids, and TORQUES.
07-11-2019, 05:43 PM
#18
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I agree but it will be carrying quite a bit of extra weight which is not enough to slow it on the straights but may hurt it just enough on the long sweeping turn and kink to lose its advantage.
07-12-2019, 05:10 AM
#21
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Originally Posted by SDGT3
I agree but it will be carrying quite a bit of extra weight which is not enough to slow it on the straights but may hurt it just enough on the long sweeping turn and kink to lose its advantage.
the GT3R is way faster than a cup car
the 935 and GT2RSCS are capable of SIMILAR times as a GT3R at tracks like Monza.
:: the clubsport is faster than the cup car
07-12-2019, 09:51 AM
#22
Race Director
Does the GT3 R and RSR have the engine in the same spot? I know the Cup car has the more rearward position like the street cars do.
07-12-2019, 11:41 AM
#23
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A bit academic but this is what folks with actual seat time can tell you:
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
07-15-2019, 11:06 AM
#24
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Thread Starter
It would be great to have a GT3R to test. Anyone attending with one can have it as part of the event.
07-15-2019, 11:09 AM
#25
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Thread Starter
A bit academic but this is what folks with actual seat time can tell you:
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
07-15-2019, 12:22 PM
#26
A bit academic but this is what folks with actual seat time can tell you:
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
GT3R > GT2RSCS >> GT3Cup
Over a two-minute lap the delta between a GT3R and the GT3Cup is 4-5 seconds (Sepang F1 or Shanghai F1), the R on SRO Blancpain GT3 BOP (Pirelli DH) and the GT3Cup spec Carrera Cup (Mich N2#)
The GT2RSCS is a Cup chassis with entry-level electronics and turbos. It doesn't have the trick electronics, aero or suspension or front tires of the R, and will in fact run identical Mich N2# rubber as the Cup. It slots neatly between those two bookends.
These REALLY are 3 racecars of completely different specs, use case and target audience.
07-15-2019, 01:32 PM
#28
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Fastest lap was about 2 seconds slower.
The GT2RS CS could probably do 2:08.5's in my estimation if the track conditions permit.
But if you put a factory driver in the car and let him test and tune it all day, you could shave off another second on new slicks with low fuel load.
Here is the big point of the GT2RS......it's WAAAAAAAY EASIER for an AM to get a fast lap in the GT2RS CS than it is in the GT3R, hence why this car was built.
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07-15-2019, 01:34 PM
#29
07-15-2019, 04:32 PM
#30
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Thread Starter
Well for reference, last year's fastest qual time in a GT3R at Road America with Pirelli slicks during the SRO weekend was a 2:05.0 by Factory Driver Michael Christensen.
Fastest lap was about 2 seconds slower.
The GT2RS CS could probably do 2:08.5's in my estimation if the track conditions permit.
But if you put a factory driver in the car and let him test and tune it all day, you could shave off another second on new slicks with low fuel load.
Here is the big point of the GT2RS......it's WAAAAAAAY EASIER for an AM to get a fast lap in the GT2RS CS than it is in the GT3R, hence why this car was built.
Fastest lap was about 2 seconds slower.
The GT2RS CS could probably do 2:08.5's in my estimation if the track conditions permit.
But if you put a factory driver in the car and let him test and tune it all day, you could shave off another second on new slicks with low fuel load.
Here is the big point of the GT2RS......it's WAAAAAAAY EASIER for an AM to get a fast lap in the GT2RS CS than it is in the GT3R, hence why this car was built.