Crown

Board: Porsche - 911 - 996 - Turbo Language: English Region: Worldwide Share/Save/Bookmark Close

Forum - Thread


    Throttle response

    I own a 996 Turbo S, Tiptronic transmission.
    I have noticed that throttle response can vary enormously, even under exactly similar conditions, i.e. the same gear engaged, the same revs and load on the engine and exactly the same pressure applied to the throttle. Sometimes the engine is extremely responsive to the throttle input, like a racing engine, other times it can feel very sluggish.
    1) Is this a Tiptronic thing or does the same occur with a manual gearbox?
    2) Can one modify/influence this so that throttle response always stays very responsive, like in a "Sport" mode of some kind?

    Stamatis

    Re: Throttle response

    I noticed that as well. I'm thinking that, in my case at least, it's down to all the heat and humidity. It's not sluggish, it's feels like it's not as fast and that might be because I'm also getting used to the power. Do you notice your boost gauge when you're on the throttle? It should be reading .8 to .9 with some 1.0 spikes along the way.

    Re: Throttle response

    The Tiptronic also adapts to your driving style...if you are light on the throttle, it will upshift at lower revs and also down-shift much less aggressively. If you drive it "harder" it remembers and shifts accordingly. This characteristic of the Tiptronic could make it appear that the car is sluggish and less responsive.

    Re: Throttle response

    Quote:
    964C2 said:
    The Tiptronic also adapts to your driving style...if you are light on the throttle, it will upshift at lower revs and also down-shift much less aggressively. If you drive it "harder" it remembers and shifts accordingly. This characteristic of the Tiptronic could make it appear that the car is sluggish and less responsive.



    Yes, the Tiptronic adapts, but not as advertised or as you describe.
    I have done 60,000 klm with the car and I never succeeded in forcing the Tiptronic to adapt the mode I wished to use at the very moment I wanted it.
    I wish there was a mode selector for us to use, rather than having to be aggressive with the accelerator in order to force a mode change, at times when it simply is not safe to floor the gas pedal! (i.e. traffic in front)
    But I agree with you that most probably the phenomenon I describe is due to the Tiptronic being in different modes.

    Stamatis

    Re: Throttle response

    Quote:
    964C2 said:
    The Tiptronic also adapts to your driving style...if you are light on the throttle, it will upshift at lower revs and also down-shift much less aggressively. If you drive it "harder" it remembers and shifts accordingly. This characteristic of the Tiptronic could make it appear that the car is sluggish and less responsive.



    I must admit I have never seen a 1.0 in the boost indicator.
    0.7 and very momentarily 0.8 is the highest I have seen.
    And according to the Manual, this is what I am supposed to see. Should I see a 1.0?

    Re: Throttle response

    Not likely unmodified.

    Re: Throttle response

    Quote:
    Stamatis said:
    Quote:
    964C2 said:
    The Tiptronic also adapts to your driving style...if you are light on the throttle, it will upshift at lower revs and also down-shift much less aggressively. If you drive it "harder" it remembers and shifts accordingly. This characteristic of the Tiptronic could make it appear that the car is sluggish and less responsive.



    Yes, the Tiptronic adapts, but not as advertised or as you describe.
    I have done 60,000 klm with the car and I never succeeded in forcing the Tiptronic to adapt the mode I wished to use at the very moment I wanted it.
    I wish there was a mode selector for us to use, rather than having to be aggressive with the accelerator in order to force a mode change..Stamatis

    Isn't agressive use of the accelerator in order to change the way the car shifts exactly what Porsche and 964C2 said?

    Re: Throttle response

    Quote:
    LowPolarMoment said:
    Isn't agressive use of the accelerator in order to change the way the car shifts exactly what Porsche and 964C2 said?



    The phenomenon described pretty much corresponds to what you expect of an "adaptive" control system like the Tiptronic's.

    "Adaptive" means that it adapts progressively to recent "events"; it does not make an immediate "knee-jerk" response to the last input.

    Re: Throttle response

    Quote:
    fritz said:
    Quote:
    LowPolarMoment said:
    Isn't agressive use of the accelerator in order to change the way the car shifts exactly what Porsche and 964C2 said?



    The phenomenon described pretty much corresponds to what you expect of an "adaptive" control system like the Tiptronic's.

    "Adaptive" means that it adapts progressively to recent "events"; it does not make an immediate "knee-jerk" response to the last input.

    Well, I thought it was obvious that's what it meant. If it reprogrammed every 10 seconds it wouldn't accomplish its purpose.

    Re: Throttle response

    Quote:
    Statman said:
    Not likely unmodified.



    Statman (or anyone),

    Do you know if one can achieve higher BAR/PSIa/PSIg readings with the manual vs. Tippy? In my manual TSCab, I can routinely get 0.9BAR in 2nd and 3rd gear at 3,000 to 6,000 rpm's. I drive at about 600 feet ASL on average. If I modded the car to 550HP/780NmT with the RUF package, I wonder what kind of boost I'd get then and, of course, at what risk (not to the warranty, but to the cooling demands )?

    When the 997TT comes (? with the variable geometry turbo), presumably the boost will kick in earlier with the altered impeller mechanics?

    Re: Throttle response

    Quote:
    If it reprogrammed every 10 seconds it wouldn't accomplish its purpose.



    Personally I would have preferred a mode selector, where by engaging the desired mode, the change in the gear shift mapping is immediate , rather than "adaptive".
    Just like the VW Golf GTI's DFG "Sport" mode selector. It does exactly what I would expect of such an automatic gearbox.

    Stamatis

    Re: Throttle response

    The tiptronic changes modes when it senses that you're either wanting to go slower or faster. I do agree with you that a dedeicated sport setting is prefrebale.

    My car is stock and I do see .8 to .9 everytime I mash the throttle. 1.0 comes in quick spikes but that may be due to the humidity that we suffer from here. I'm also running VP 103 octane unleaded race gas because the local octane rating is only 95 octane at best.

    Re: Throttle response

    Any comments re. the accuracy of the digital dial readout of boost pressures? I hit 1.1 BAR this evening in my TSCab during some spirited driving in 2nd gear up to 75mph after work. It was a mild evening, 68 degrees F at 8:00pm (20:00).

    Is there a standard factory limit on what kind of pressures the K24's can reach with the Bosch Motronic program?

     
    Edit

    Forum

    Board Subject Last post Rating Views Replies
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA (Part I) Thread Closed 9/24/20 12:47 AM
    watt
    748164 2849
    Porsche Sticky The moment I've been waiting for... 8/11/21 2:00 PM
    throt
     
     
     
     
     
    451391 1287
    Porsche Sticky OFFICIAL: New Porsche 911 Turbo S (2020) 9/21/21 11:01 AM
    Leawood911
    166578 1101
    Porsche Sticky Welcome to Rennteam: Cars and Coffee... (photos) 9/17/21 8:59 PM
    Boxster Coupe GTS
    65518 380
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA (Part II) 9/22/21 3:45 PM
    JoeRockhead
    54279 520
    Porsche Sticky ROAD TEST: New 992 Carrera 4S 3/3/21 10:57 PM
    Wonderbar
    46499 336
    Porsche Sticky Porsche Taycan Turbo S - Short Review 10/19/20 6:12 PM
    Leawood911
    42960 380
    Porsche Sticky Porsche extends the Taycan model range (Taycan 2WD) 2/1/21 12:42 PM
    Leawood911
    12000 29
    Porsche Cayman GT4 5/4/21 4:46 PM
    Topspeed
    465184 3586
    Porsche OFFICIAL: 911 GT2 RS (2017) 6/25/21 2:56 PM
    the-missile
    384896 3506
    McLaren McLaren on a winning streak 8/12/21 4:57 PM
    Topspeed
    381351 3918
    Porsche OFFICIAL: 991.2 GT3 RS (2018) 4/28/21 12:26 PM
    W8MM
    347367 3252
    Porsche Tesla Roadster 9/23/20 8:22 PM
    bluelines
    337407 4279
    Porsche OFFICIAL: 911 R (2016) 12/8/20 7:51 PM
    DJM48
    317046 2646
    Porsche 992 GT3 9/17/21 4:41 PM
    lexs4
    262554 2975
    Porsche OFFICIAL: The new Porsche 992 – a design icon and high-tech sports car 9/22/21 4:08 PM
    Topspeed
    249954 1568
    Porsche OFFICIAL: New Panamera (2016) 2/11/21 9:22 AM
    Itsme
    167478 1379
    Others Alfa Romeo 4C 9/23/20 10:22 AM
    RCA
    143249 792
    Lambo Lamborghini Huracan and variants 4/9/21 4:32 PM
    Topspeed
    117982 1225
    Porsche Donor vehicle for Singer Vehicle Design 9/22/21 1:28 AM
    Leawood911
    101866 749
    Porsche Welcome to the new Taycan Forum! 7/5/21 4:30 PM
    BjoernB
    92237 1221
    McLaren F1 7/10/21 7:43 AM
    BiTurbo
    82021 209
    Lambo Aventador and SV 8/27/21 2:33 PM
    Topspeed
    71350 698
    AMG AMG GT R 7/8/21 3:07 PM
    CGX car nut
    71180 824
    Porsche Nürburgring - Tesla vs. Taycan 11/23/20 6:10 PM
    Topspeed
    50598 596
    Others Tesla 2 the new thread 9/14/21 1:11 PM
    BjoernB
    47183 1165
    Others Bugatti Chiron 7/22/21 6:55 PM
    Topspeed
    41929 480
    Ferrari Ferrari 812 Superfast 6/24/21 6:30 PM
    Porker
    39706 531
    Porsche Olive 991.2 GT3 Clubsport 1/1/21 7:58 PM
    throt
    38490 615
    BMW M BMW M2 Rumors 7/7/21 8:38 PM
    Jim_in_Iowa
    30420 394
    269 items found, displaying 1 to 30.