I am a little bit "worried" that Porsche changed the whole GT-911 strategy. The new GT3 is already very powerful and fast and while in the past, Porsche usually offered a GT3 RS with 20 kg less weight, 20 hp more power, some chassis mods and a larger rear wing, etc., I am afraid that this time, the new GT3 RS could actually become some sort of replacement (in a sense or another) for the GT2/GT2RS line, by offering over 500 hp, even less weight (50kg or more) than the GT3 and a completely different, more track oriented setup. This could actually justify the rumored hefty price increase for the RS version, which some say, could even exceed the currently rumored 180k EUR.
So in theory, for Porsche it would probably make sense to:
1. Scrub the GT2 and GT2 RS
2. Offer a "960" (mid-engined car with a performance between the 918 and 991 Turbo S, maybe even with that rumored tri-turbo 6 cyl. boxer engine, which would probably be more fuel efficient than a turbo charged V8)
3. Offer a GT3 RS with more power, even lesser weight, to satisfy possible GT2/GT2RS "switchers" who don't want to get a "960" for much more money (this RS could go even for 190k), straight line performance being at 991 Turbo S level but with much better track performance, even better or at par with the 997 GT2RS.
I hope I didn't give Porsche an idea here but it actually makes more sense in my opinion since the GT3 RS would be based on the GT3 and they could scrub the entire GT2 line, no need for an improved turbo engine with dry sump lubrification/external oil tank anymore.
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RC (Germany) - Rennteam Editor Porsche 991 Turbo S (Sept. 2013), Cayenne GTS (958), BMW X3 35d (2013)