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Now I am reminded why I was so attracted to the GT2/GT3 forums for so long. Like-minded, always looking for that edge.
Reminds me of sitting down in a room with a bunch of side conversations going between Al Unser Sr, Haywood, Dallenbach, Murry, Law, etc when Darren turned on the TV and a mud race/tractor pull was going. Room went silent and everyone was instantly on one steely eyed page.
Ask Trakcar how quickly I disappeared between corners at the GP track. He has first hand experience how much quicker the GT2RS can pick up speed over the GT3RS. But because of that extra speed I will also need to brake earlier than him. Yes the GT3RS is lighter so it will have an advantage around corners, as for downforce, are you sure a GT3RS makes more downforce than a GT2RS?
Porsche marketing played us nicely.
Here are the Porsche published downforce numbers:
- 991.2 GT2 RS 686# and 915# on max downforce at 211mph (there is a speed limiter at 211mph, the car is capable of over 220mph bone stock).
- 991.2 GT3 RS 750# and 992# on max downforce. The catch: at 186mph. At 300 kp/h King Kong does 711# in max downforce mode.
We could say 711 vs. 992 is a small downforce difference (281#). Well, the 991 GT forum popular sidekick, a.k.a. McLaren 600LT produces 221 lbs of total downforce at 155mph, meaning that the downforce difference between the GT3RS and the GT2RS is a "Complete McLaren 600LT" and some more. We would need 2 (two) 991 Tourings with the GT3 front end and splitter, and the rear diffuser, to account the downforce difference between the GT3RS and GT2RS and we are short. The difference is big enough, that a complete 991.2 GT3 at 186mph produces a little more than the difference between the GT3RS and GT2RS.
Picture of the infamous flap to be removed for Max downforce in the Cayman GT4, 991.2 GT3RS and 991.2 GT2RS.
Spa is a downforce track and this is the first time I learn to drive downforce.
And all the downforce and suspension improvements really makes me miss my ST rotors.
The steel brakes are not as good, or confidence inspiring and it’s the only thing they didn’t improve.
Usable 9000RPM is nice and I still hit the rev limiter once in a while it pulls so much harder up top.
Pete, always trying to win my DE :-)
Nine and a half hours to go..
- 991.2 GT2 RS 686# and 915# on max downforce at 211mph (there is a speed limiter at 211mph, the car is capable of over 220mph bone stock).
- 991.2 GT3 RS 750# and 992# on max downforce. The catch: at 186mph. At 300 kp/h King Kong does 711# in max downforce mode.
We could say 711 vs. 992 is a small downforce difference (281#). Well, the 991 GT forum popular sidekick, a.k.a. McLaren 600LT produces 221 lbs of total downforce at 155mph, meaning that the downforce difference between the GT3RS and the GT2RS is a "Complete McLaren 600LT" and some more. We would need 2 (two) 991 Tourings with the GT3 front end and splitter, and the rear diffuser, to account the downforce difference between the GT3RS and GT2RS and we are short. The difference is big enough, that a complete 991.2 GT3 at 186mph produces a little more than the difference between the GT3RS and GT2RS.
Picture of the infamous flap to be removed for Max downforce in the Cayman GT4, 991.2 GT3RS and 991.2 GT2RS.
^ Fwiw, the GT2 RS was notably more stable at Road America, one of our few tracks where that's gonna be obvious enough to notice at multiple points around the track.
Originally Posted by TRAKCAR
Spa is a downforce track and this is the first time I learn to drive downforce.
And all the downforce and suspension improvements really makes me miss my ST rotors.
The steel brakes are not as good, or confidence inspiring and it’s the only thing they didn’t improve.
Usable 9000RPM is nice and I still hit the rev limiter once in a while it pulls so much harder up top.
Pete, always trying to win my DE :-)
Nine and a half hours to go..
Crap. I'd better enter the lap time and set an alarm.
Surprised there aren't more guesses. There's one that's awfully close to the GT2 RS time, and it doesn't cost a thing to make a guess, even if it's a WAG or a guess based on someone else's.
^ Fwiw, the GT2 RS was notably more stable at Road America, one of our few tracks where that's gonna be obvious enough to notice at multiple points around the track.
Crap. I'd better enter the lap time and set an alarm.
Surprised there aren't more guesses. There's one that's awfully close to the GT2 RS time, and it doesn't cost a thing to make a guess, even if it's a WAG or a guess based on someone else's.
Remember, the time will take this form: 2:xx.xx
Sweet dreams...
somy times are corrected to the format GT2 RS 2:15.50, GT3RS 2:20.10
Pete,
Could-you, please collect the actual data, but I have seen a diagram about the downforce and GT2 RS<GT3 RS<GT2 RS ClubSport<Cup; from memory.
The figures were at 200 km/h and I was surprised by the difference between the GT2 RS and the GT3 RS.
I would be curious to know where the "935" is, in such company.
Does anyone have downforce numbers for a .2 GT3 besides what Porsche specs at top speed? That value is meaningless essentially since you'll never hit that speed on a track.
Unless Daytona where you don't want too much downforce.
I want to run Daytona again. Last time I did my Carrera GTS PASM and PSM freaked out on the banked turns and went into fail mode. Do you know if the current crop on GT3 cars has this same issue? The yaw sensor in the car made the ecu think the car was flipping over.
04-29-2019, 09:49 PM
