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Re: 991GT3 RS latest rumors
BiTurbo:
The sunroof is plain stupid and shouldn't be mandatory on TTS
Last time I looked at the US Configurator it was optional on TTS (can't get it to work right now to check)
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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550
Re: 991GT3 RS latest rumors
RC:Why would the 991 Turbo S not be a good track car?
1,650Kg+...
This is why we were discussing a possible weight reduction. 100 kg should suffice, a possible GT2 RS won't be lighter.
IMO, 1,550kg is still way too heavy for a track car with that sort of power and large tires. Costs are very high for brakes and tires (assuming everything else is track ready) with such a fast and heavy car running 20" rubber. Would not make sense for someone who likes to track every week (weather permitting), like myself.
If I owned 991 TTS, I think it would be worth it to have a second car with reasonable running cost to use on the track (unless one doesn't have cost constraints).
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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550
Re: 991GT3 RS latest rumors
RC:
sidicks:
RC:I sometimes do not understand Porsche's model policy at all.
Why would the 991 Turbo S not be a good track car?
1,650Kg+...
This is why we were discussing a possible weight reduction. 100 kg should suffice, a possible GT2 RS won't be lighter.
1300 kg +/- 50 kg would rather be ok, but is still too heavy for some longer track runs.
After some lapps e.g. on HHR not only the UHP tires are finished with 1500 kgs car weight, I'm also not shure if such weight would also stress the cross members and the chassi subframe too much. On that aspect, we're not even talking about long/short term effects when using semi slicks (regarding engine / chassis / subframe) 
Mar 2, 2014 7:35:10 PM
- bluelines
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Re: 991GT3 RS latest rumors
Maybe this helps 
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Suzy
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Re: 991GT3 RS latest rumors
The latest rumour is that Porsche are fearing reliability issues if their goal to extract additional power from the high revving and already troubled engine, sufficient to satisfy the GT3 RS requirements. Therefore, they are considering turbocharging which is en vogue anyway with high performance cars.
I find this difficult to believe but OTOH could they make this N/A engine give over 500 HP without trouble?
So, we will have the "Carrera turbo" (3.0 T/C for 991.2) the "911 Turbo" and the "GT3 turbo". Very confusing.
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"Form follows function"
Re: 991GT3 RS latest rumors
reginos:
...could they make this N/A engine give over 500 HP without trouble?
Difficult if they stay at 3.8L, but easy if they go to 4.0 or larger displacement.
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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550
May 29, 2014 7:28:22 PM
- Boxster Coupe GTS
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Re: 991GT3 RS latest rumors
it's worth keeping in mind that the Porsche 991 GT3 RS road car...
...will be used to officially homologate the Porsche 991 RSR racing car...
"...the 991 GT3 RS will continue to be naturally aspirated, using the 991 GT3’s 3.8-litre engine, with a power output rumoured to be around 500bhp..."
May 29, 2014 8:00:24 PM
- Grant
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May 29, 2014 8:22:20 PM
- Boxster Coupe GTS
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Re: 991GT3 RS latest rumors
Grant:
Just barely under the specific output of the 458 Speciale (132 hp/L vs 133 hp/L) if it's 3.8L and 500hp.
I expect that the engineers in Weissach have worked with both 3.8 and 4.0 litre naturally aspirated engines during the 991 GT3 RS development process.
With a 4.0 litre engine, they wouldn't need a higher specific output than the 475hp 3.8 litre GT3 engine to produce 500hp for the 991 GT3 RS...
May 30, 2014 9:54:43 AM
- Boxster Coupe GTS
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Re: 991GT3 RS latest rumors
Autocar:"Porsche considers turbocharging for next 911 GT3 RS"
(30 May 2014)
New flagship 911 GT3 RS could receive a turbocharged flat-six engine for improved performance and reliability...
Porsche is considering a break in tradition by adopting a turbocharged engine for the next 911 GT3 RS.
The 911 GT3 on which the more potent 991-generation GT3 RS would be based has had widely publicised fire problems with its highly tuned, naturally aspirated 468bhp 3.8-litre flat six engine.
Porsche engineers are understood to be concerned at the prospect of trying to reliably extract enough extra power from the naturally aspirated engine to warrant an RS badge.
As such, a turbocharged engine is instead being considered. This would comfortably deliver the extra power needed without compromising reliability. It would also fit in with the current turbocharging ethos in the supercar segment.
Meanwhile, the 911 GT3’s rear-wheel steer system is understood to be under consideration for the Cayman for later in the model’s life cycle.
The Cayman will be the first Porsche sports car to get the firm’s upcoming four-cylinder turbo petrol engine, which is believed to run an output of about 400bhp.
Autocar link: http://www.autocar.co.uk/car-news/new-cars/porsche-considers-turbocharging-next-911-gt3-rs
...it sounds like Autocar has been reading too many forums!
To state the obvious, a turbocharged GT3 is a GT2!
Jun 3, 2014 9:29:37 AM
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RC
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Jun 3, 2014 9:41:37 AM
- reginos
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Re: 991GT3 RS latest rumors
Boxster Coupe GTS:
Autocar:"Porsche considers turbocharging for next 911 GT3 RS"
(30 May 2014)
New flagship 911 GT3 RS could receive a turbocharged flat-six engine for improved performance and reliability...
Porsche is considering a break in tradition by adopting a turbocharged engine for the next 911 GT3 RS.
The 911 GT3 on which the more potent 991-generation GT3 RS would be based has had widely publicised fire problems with its highly tuned, naturally aspirated 468bhp 3.8-litre flat six engine.
Porsche engineers are understood to be concerned at the prospect of trying to reliably extract enough extra power from the naturally aspirated engine to warrant an RS badge.
As such, a turbocharged engine is instead being considered. This would comfortably deliver the extra power needed without compromising reliability. It would also fit in with the current turbocharging ethos in the supercar segment.
Meanwhile, the 911 GT3’s rear-wheel steer system is understood to be under consideration for the Cayman for later in the model’s life cycle.
The Cayman will be the first Porsche sports car to get the firm’s upcoming four-cylinder turbo petrol engine, which is believed to run an output of about 400bhp.
Autocar link: http://www.autocar.co.uk/car-news/new-cars/porsche-considers-turbocharging-next-911-gt3-rs
...it sounds like Autocar has been reading too many forums!
To state the obvious, a turbocharged GT3 is a GT2!
The GT3 RS could use a light pressure turbo for an extra 50 HP (similar to the upcoming system of the Carrera) , whereas the GT2 could use a more powerful version of the VTG turbocharging.
Don't think in terms of the past. In the new era the turbo will be everywhere.
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"Form follows function"
Re: 991GT3 RS latest rumors
The GT3 RS will use the GT3 engine. You need also to understand the psychology behind the GT3 RS, besides the homologation stuff the GT3 RS will be used for (maybe). This isn't just another Porsche...this is the GT3 RS.
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RC (Germany) - Rennteam Editor Porsche 991 Turbo S, Porsche Boxster S (981), Jeep Grand Cherokee SRT (2014), BMW X3 35d (2013)
Re: 991GT3 RS latest rumors
If the spy pictures are really of the RS, the side intakes lead to a t/c engine. Low pressure single turbo for the GT3 RS and twin turbo VTG for the Turbo/S/GT2.
IMO the ingredients don't matter. What count are the power delivery and the driving experience.
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"Form follows function"
Jun 5, 2014 5:42:18 AM
- Atzporsche
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Re: 991GT3 RS latest rumors
No if anything why not give the GT3 RS like a little more to 500HP and then make it Manual shift
Why not then turbocharge the engine and call it GT2 with 600HP minimum.
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Jun 5, 2014 5:49:32 AM
- reginos
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