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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    I really hope so. I would have bought one in a heartbeat without that daft roof. It just kills the usability if you live anywhere it rains.


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    2011 987S, 1964 Type 1


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Do we really think porsche will make an inline 4 instead of a flat 4? Can't imagine them convincing themselves that it would be a good idea no matter how cheap the VW donor block might be. A central selling proposition for Porsche is also sound, and sound by definition will be fundamentally different if they don't use a flat 4.


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Any news about Turga? smiley


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Any news about the RS?broken heart


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    997TT RS Tuning stage II(sold),2011 Cayenne Turbo(sold),waiting 991 GT3 RS


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Super Darius:

    Any news about the RS?broken heart

    SmileySmiley


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    SportCarGroup:
    Super Darius:

    Any news about the RS?broken heart

    SmileySmiley

    Smiley


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    997TT RS Tuning stage II(sold),2011 Cayenne Turbo(sold),waiting 991 GT3 RS


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    But I heard that there will be some kind of celebration of "40th 911 Turbo Anniversary"....


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    996FourEss:

    Do we really think porsche will make an inline 4 instead of a flat 4? Can't imagine them convincing themselves that it would be a good idea no matter how cheap the VW donor block might be. A central selling proposition for Porsche is also sound, and sound by definition will be fundamentally different if they don't use a flat 4.

    No, I don't believe it.  The new DFI motor was intentionally built to be modular, so that it could be constructed as a Flat-4, Flat-6, or Flat-8.  If Porsche is going to use a 4-cyl in its sports cars, I'd be shocked if it wasn't the Flat-4 version of the 9A1.


    --

    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: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    991-2  Turbo kissed the guardian wall while testing...

    2016-porsche-911-turbo-facelift-spy-shots_100467776_l.jpg1400838092418S14_0283_fine.jpg2016-porsche-911-turbo-facelift-spy-shots_100467780_l.jpg


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Let's talk about the future of the PDK, all I've heard was that Porsche is working on the next generation PDK, but the only detail which was revealed is that it will no longer have seven gears... Well I guess it will be more than seven but it doesn't make sense to put more and more gears in a transmission because of the weight and there's no further usefull use for the engine power delievery.  Anyhow, the 991.2 should receive a shiftspeed improvement and hopefully a software update to hold gears in manual mode...


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    RS 991:

    Let's talk about the future of the PDK, all I've heard was that Porsche is working on the next generation PDK, but the only detail which was revealed is that it will no longer have seven gears... Well I guess it will be more than seven but it doesn't make sense to put more and more gears in a transmission because of the weight and there's no further usefull use for the engine power delievery.  Anyhow, the 991.2 should receive a shiftspeed improvement and hopefully a software update to hold gears in manual mode...

    VW is said to have a ten speed gearbox out soon and with more stringent fuel/emission standards coming into play in the not-to-distant future, one would imagine that seven is no longer enough.  


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    VW had several issues with the durability of the 7 speed dual clutch gearbox. The gear shaft with gears 1-3-5-7 is used more than the other one which lead to the problems as far as I know. In an 8 speed dual clutch it should be more balanced.

    Furthermore the 8th gear could be another emission-reduction gear, or hopefully gears 1-7 are trimmed to deliver the power better. 6 speed seems to be very unlike IMO, 9 speed would have the same imbalance of usage as the 7 speed, 10 speed probably is too heavy and too big. So 8 speed IMO


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    The balance of the gear shaft is a good point kiss And it's not just adding a gear to get some fuel savings, by adding gears you increase the friction and the amount of physical parts what doesn't really help to increase the degree of efficiency as well as perfomance improvements. The target is to use as little parts as possible, so a reason is to simulate gears - what Porsche already does - by slipping the clutch between two gears. As an effect you have an additional region where the engine can work in. It will be interesting to see how the software and calibration of transmissions will improve, there's still a lot to improve...


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Slipping clutch is one of the most inefficient ways, wasting energy as heat, not to mention premature wear.

    With PDK shift times is not an issue anymore, unlike manuals or automatics, so there is no time delay penalty in adding gears. 

    The added weight of an extra gear is non-material, the added benefits of a higher cruising gear and more balance spread of gear ratios far out-weight the tiny weight penalty.

    The most efficient transmission for fuel economy purpose is a CVT, step less shifts, but consumers have so far rejected that as it feels unnatural to them to listen to a constant engine pitch while speed keep increasing.. Adding gears to a gearbox is one way to get close to that efficiency.


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    You're right, but that's not the case when you have a turbocharged engine. You can for example make use of the miller-cycle which changes the engine characteristic map. In addition a hybrid could fill the gaps where the efficiency isn't good. Then you probably don't need more and more gears for further efficiency improvements.  As we've heard, further carrera models may feature a turbocharged flat-6, and an 911 hybrid seems to be also in the works.                             But for a natural aspirated engine you're right. I hope the gts and gt3 models will keep them forever..angry
     
    So why does Porsche use virtual gears in the PDK when they're so inefficient? yes There's certainly an efficiency purpose.

    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Ah Miller Cycle. A name from the past. I had a Mazda before that uses the Miller Cycle. 

    I think Porsche is using the 'virtual gear' to mimic the torque converter in a automatic, it only kicks in at low speed and low gears, like 1st and 2nd, a way to smooth out the power so as not to get lurches during stop and go traffic. It's one thing some customers misses using PDK compared with a traditional automatic.  Since it also drops the revs, fuel saving is there for efficiency purposes.


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Any clue when the below 991 GTS would be available for ordering?

    http://www.motorauthority.com/news/1088947_2015-porsche-911-carrera-gts-spy-shots


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    I think it's too close to the facelift, so that it will be presented with the facelift model with a natural aspirated engine if the other carrera models receive turbo flat-6 engines. If not it will come even later.


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    There is a rumour in the Autocar that the GT3 RS might be turbocharged.


    --

    "Form follows function"


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Yes, because of the side air intakes which are usually used for the turbocharged versions. but I think it's just a wrap.
     
    Maybe you meant this one below... and it definitely doesn't sound like a turbocharged engine. Smiley
     

    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    rfakhri:

    Any clue when the below 991 GTS would be available for ordering?

    http://www.motorauthority.com/news/1088947_2015-porsche-911-carrera-gts-spy-shots

    http://www.motorauthority.com/news/1049850_2015-porsche-911-carrera-gts-cabriolet-spy-shots

    They say at 2014 Paris motor show with the 991 facelift.. is it possible? Smiley


    --

    2011 Porsche 911 Carrera 4S Cabriolet PDK Basalt Black/Cocoa

    2013 Aston Martin Cygnet 


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Usually the facelift model comes after four years and the GT3 RS of the current model isn't even out yet, therefore 2014 is quite unrealistic. 


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Facelift 991 will be MY2016, which means that they will start producing them in the second half of 2015. Paris is a little bit too early maybe, but certainly possible. Geneva in march 2015 seems more likely to me.


    --

    Suzy

    2013 Porsche Boxster S (MT) | Basalt black metallic    [SOLD]
    2014 Audi A6 Avant 3.0 BiTDI Quattro | Moonshine blue metallic
     


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Hey guys,

    This image popped up on Jalopnik with a thread discussing what this car and highlighted unit could be. What do you guys think? I could not find this picture previously posted on this thread.

    911proto.png

    I believe it is some sort of data collection unit while others speculated some sort of battery pack. Rennteam thoughts?


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Mid engined prototype like the 965??

    http://www.autoblog.com/2014/05/23/porsche-unlocks-secrets-of-its-mid-engine-911/

    nooo, dont think so, the rear windows would be blackened out. but a battery pack that high up doesnt make sense either. Guess it's just some measuring gear...


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    turbolite


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    turbolite:

    Mid engined prototype like the 965??

    http://www.autoblog.com/2014/05/23/porsche-unlocks-secrets-of-its-mid-engine-911/

    nooo, dont think so, the rear windows would be blackened out. but a battery pack that high up doesnt make sense either. Guess it's just some measuring gear...

    One would agree.  Battery packs, because of weight are typically mounted low in the chassis.  Look to the 918, for example, the battery pack is mounted low and in the center of the platform with the fuel cell mounted above it.  There is no reason not to expect that a battery pack would be located low in the platform and probably below the rear seats.


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    CGX car nut:
    turbolite:

    Mid engined prototype like the 965??

    http://www.autoblog.com/2014/05/23/porsche-unlocks-secrets-of-its-mid-engine-911/

    nooo, dont think so, the rear windows would be blackened out. but a battery pack that high up doesnt make sense either. Guess it's just some measuring gear...

    One would agree.  Battery packs, because of weight are typically mounted low in the chassis.  Look to the 918, for example, the battery pack is mounted low and in the center of the platform with the fuel cell mounted above it.  There is no reason not to expect that a battery pack would be located low in the platform and probably below the rear seats.

     

    Unless you are McLaren, who mounted the P1's batteries on top of the fuel tank and then claim it was by design Smiley


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    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    That was exactly my thought. Low slung weight. Also, Porsche would have them sorted by now to the point where the battery pack would be a little more disguised or 'finished' looking. 


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    Whoopsy:
    CGX car nut:
    turbolite:

    Mid engined prototype like the 965??

    http://www.autoblog.com/2014/05/23/porsche-unlocks-secrets-of-its-mid-engine-911/

    nooo, dont think so, the rear windows would be blackened out. but a battery pack that high up doesnt make sense either. Guess it's just some measuring gear...

    One would agree.  Battery packs, because of weight are typically mounted low in the chassis.  Look to the 918, for example, the battery pack is mounted low and in the center of the platform with the fuel cell mounted above it.  There is no reason not to expect that a battery pack would be located low in the platform and probably below the rear seats.

     

    Unless you are McLaren, who mounted the P1's batteries on top of the fuel tank and then claim it was by design Smiley

    You know, I haven't given the P1 any study time - specs/cutaways/etc. My attention in that arena has been all 918. I did not know McLaren mounted the batteries that way - interesting!


    Re: 991 spyshots thread (continued) (for UNRELEASED models only) Thread Closed

    All because the P1 uses the 12C platform. The space above the gas tank is the only place they can stash the batteries. Also, they put the e-motor where the starter motor is as they didn't have room to extend the 12C chassis in order to fit it inline like the 918 or the LaFerrari. All hard points are confined by the 12C platform.

    Despite the compromise, the P1 is still a great performer, but just imagine how much better it can be had McLaren got the money to do a ground up design instead of recycling the 12C platform.

     


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