• Car and Driver gets the quickest and fastest 2014 991 Turbo S Magazine numbers so far - 10.8 @ 126 1/4 mile

      The 991 Turbo S test numbers are perplexing to say the least. MotorTrend managed to get a 10.9 @ 123.7 1/4 mile sprint out of the car. Road and Track essentially mirrored this with a result of 10.9 @ 124.4. Car and Driver now gets into the mix and their acceleration numbers are the best of the bunch with a 10.8 @ 126 1/4 mile elapsed time and trap speed. Their timed 0-60 run for the all wheel drive Turbo S comes in at a blistering 2.6 seconds.


      Even though a 10.8 @ 126 is the quickest and fastest of the three major US Magazines these numbers still are slow. Independent drag strip results are better with a 10.68 @ 128 pass on the dragstrip. Car and Driver, Road and Track, and MotorTrend all get a result with the more powerful 991 Turbo S that is closer to the standard 991 Turbo. The standard car at PBIR (Palm Beach International Raceway) in Florida ran 10.9 @ 126.

      So what is the deal? We really do not know. Maybe the cars pull timing due to aggressive software. It would explain why dyno results seem to vary greatly pull to pull. The spread shown on an all wheel drive Dynojet is up to 30 wheel horsepower and torque can change by almost 60 lb-ft. Heat soak, software, timing, whatever it may be something is causing inconsistent performance with the 991 Turbo and Turbo S.

      This article was originally published in forum thread: Car and Driver gets the quickest and fastest 2014 991 Turbo S Magazine numbers so far - 10.8 @ 126 1/4 mile started by Sticky View original post
      Comments 14 Comments
      1. ecpchris's Avatar
        ecpchris -
        Damn, the paint is swirled on that poor car.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Just read this before coming here today haha. I too thought the 1/4 time was a bit low, and trap speed is definitely low...hell there's stock M6s that have come close to that. Definitely seems to be some software stuff going on. Either way...these things are crazy fast. Will be interesting to see what the aftermarket does for them.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        Just read this before coming here today haha. I too thought the 1/4 time was a bit low, and trap speed is definitely low...hell there's stock M6s that have come close to that. Definitely seems to be some software stuff going on. Either way...these things are crazy fast. Will be interesting to see what the aftermarket does for them.
        If they are already pulling timing due to aggressive software I'm wondering what a tune is really going to do for them. The stock car looks like it will already benefit significantly from race gas.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        If they are already pulling timing due to aggressive software I'm wondering what a tune is really going to do for them. The stock car looks like it will already benefit significantly from race gas.
        Yeah most definitely. With a tune wouldn't you be able to get rid of any excessive "self-preservation" tendencies? Not that maybe you'd want to, but I feel like you'd be able to skirt some of that with a flash tune wouldn't you? Also, I'd like to see some serious data logging on one of these things to see IATs, EGTs, AFRs, boost, timing, and of course power levels over maybe 20 back-to-back dyno runs or 0-150 runs.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        With a tune wouldn't you be able to get rid of any excessive "self-preservation" tendencies?
        I don't think so. Not at this stage. That ECU is going to protect the motor. You can certainly get more aggressive with boost and timing but the ECU will probably dial it all right back. Maybe once they get better control of it they can remove those limits but tuners are barely even getting the basic tunes out.

        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        but I feel like you'd be able to skirt some of that with a flash tune wouldn't you?
        Eventually, sure, but that doesn't fix the root of the problem which seems to be octane if I were to guess. Porsche already tuned it so aggressively the car is backing off on its own.

        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        Also, I'd like to see some serious data logging on one of these things to see IATs, EGTs, AFRs, boost, timing, and of course power levels over maybe 20 back-to-back dyno runs or 0-150 runs.
        Me too but these magazines do stuff so basically it amazes me. It's 2014. It's time for them to update their testing procedures.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I don't think so. Not at this stage. That ECU is going to protect the motor. You can certainly get more aggressive with boost and timing but the ECU will probably dial it all right back. Maybe once they get better control of it they can remove those limits but tuners are barely even getting the basic tunes out.



        Eventually, sure, but that doesn't fix the root of the problem which seems to be octane if I were to guess. Porsche already tuned it so aggressively the car is backing off on its own.



        Me too but these magazines do stuff so basically it amazes me. It's 2014. It's time for them to update their testing procedures.
        Yeah you're right. I was definitely thinking long-term. Will be a while before we see that I'm sure. Race gas sounds like a must for sure. Needs some headroom badly I think. I'll never forget the first time me and my buddy plugged in the Cobb access port handheld into his WRX while we were messing around one night and watched the real-time diagnostic numbers flash across the screen. For the money, I thought that was huge. Hell, theres iPhone apps that can do that I'm pretty sure. If it can be read via OBD, it can bee measured easily. I'm surprised they're not still using stopwatches for acceleration tests at some of the magazines....
      1. Group.america's Avatar
        Group.america -
        I do not understand how a car with THAT power + that PDK + 60 mph in 2.6 seconds only goes 125 ish in the 1/4 mile at 10.8-10.9

        It should trap above 130 yes ???
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Group.america Click here to enlarge
        I do not understand how a car with THAT power + that PDK + 60 mph in 2.6 seconds only goes 125 ish in the 1/4 mile at 10.8-10.9

        It should trap above 130 yes ???
        I'd expect upper 120's based on what the 991 Turbo already showed us.
      1. Nugs's Avatar
        Nugs -
        Click here to enlarge Originally Posted by ecpchris Click here to enlarge
        Damn, the paint is swirled on that poor car.
        Haha I was thinking the exact same thing!
      1. Group.america's Avatar
        Group.america -
        Went for a spin last night in new 991 TTS, and by spin I mean my old neighbour drove it all of 5 miles, then let me drive home.... car is blisteringly QUICK out of 1st-2nd but feels a bit "wishy washy" as you get above 65 mph under WOT... now this is a brand new car (45 miles) that we did not "launch" but I gave it some curry using the MT shift...

        FWIW I only got it to 95 mph on a private road near us as we ran out of road but I am guessing it is a low 6.0-6.4s 0 -100 mph car, which is why I do not understand the 10.8 quarter mile at 126 ish... seems wrong

        From my massive 5 minute spin I actually prefer the DCT in the E9x M3 FWIW (okay here comes the hate)
      1. Sticky's Avatar
        Sticky -
        It seems like the 991 is a missile off the line but for some reason dies down up top.
      1. ticat928's Avatar
        ticat928 -
        The 2014 Turbo S generates 516 lb-ft of twisting force from between 2100-4250 rpm and a bewildering 553 lb-ft of torque in overboost mode, which occurs between 2200-4000 rpm

        Read more: http://www.motortrend.com/roadtests/...#ixzz3AP2Kmxil

        "The Sport Chrono package on the new Turbo and Turbo S offers increased torque thanks to the the overboost function. It increases maximum charge pressure by around 0.15 bar for up to 20 seconds in the mid speed range;"

        Notice it says "up to 20-sec" I suspect that is only during cool ambients. In hot weather with the "new" thermal management system the allowed overboost time may be much less, thus perhaps a lower than expected trap speed.

        +1 that this is a motor tuned very close to a safe max power level, since Porsche has faith that their engine management system will save it under any conditions, thus nothing needs to be left in the tune for contingency.

        I like how they test in this vid, no helmet, no careful braking or throttle application, just mash it and see what happens (4-wheel drifts, tail out, all in traffic, M4 get out of my way)


      1. ticat928's Avatar
        ticat928 -
        double post
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ticat928 Click here to enlarge
        Notice it says "up to 20-sec" I suspect that is only during cool ambients. In hot weather with the "new" thermal management system the allowed overboost time may be much less, thus perhaps a lower than expected trap speed.

        +1 that this is a motor tuned very close to a safe max power level, since Porsche has faith that their engine management system will save it under any conditions, thus nothing needs to be left in the tune for contingency.
        I think this explains the variance we are seeing.