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    Re: My ultimate 997GT2 blog

    Toby,

    what I always forgot to ask (until now) is whether you would perform the same modifications if you were doing the process all over again?


    Re: My ultimate 997GT2 blog

    Ferdie:

    Toby,

    what I always forgot to ask (until now) is whether you would perform the same modifications if you were doing the process all over again?

    Hi Ferdie

    Firstly it is worth noting that I drive this car every day including city traffic so it was essential that the drivability was like stock and importantly the clutch. I have the Sachs 890NM clutch with standard dual mass flywheel and the daily drivability is very similar to a standard car. The clutch will slip occasionally when the temp drops below 10C in higher gears between 3000 and 5000rpm so I have to be aware and drive around that to keep the clutch alive and so far so good in ~8000miles.

    For the GT2 with it being RWD this engine is right on the limit or probably a bit over it depending on how "lively" one like a car to be ? The 997s traction control and PASM systems really make the car super fun to drive and for me this much torque (over 800NM from 2750rpm to virtually the rev limiter) would be undrivable in a 996GT2 for example as the electronic nannys are super nannys, flickering away all the time and quite a lot of the time when one doesn't even realize that disaster was a fraction of a second away. The nannys allow for a nice amount of wheel spin and slide, just enough for great fun driving.

    I do have an issue with the tuning which manifested itself once the temperatures got below 10C and that is that the standard VTG mechanisms cannot control fast enough the onset of the boost between 2500 and 3000rpm so the volume of air overshoots the ECU targets and causes a big misfire/backfire..... I thought it was just a bit of fun like a rev limiter until I kept on the gas one time and did this

    Luckily there was no engine damage and a couple of new intake manifolds (they are cheap plastic so not very strong) later I was back on the road and I just have to not play violently with the throttle around these revs, it sounds bad but in practive it is no real hardship.

    Suffice to say I hope to get this issue fixed shortly but suspect it will mean lower those boost targets so it doesn't overshoot and therebye less torque (but we will see what Schmirler decides)

    Apart from that the car is very fast, I recorded a 0-300 in sub 22s recently and the real piece de resistance is the throttle response, we did a test at an airfield against a 996 turbo with special fast spooling K24/20g turbos with alleged 800hp. You can see from the vid that the VTG response makes the older turbo car look ridiculous (we did this a few times in different gears and the resukt was the same, the VTG car just leaps ahead and puts 5 car lengths before the normal turboed car gets spooled up)

    http://www.youtube.com/watch?v=9cQWMDhQ7W8&list=UUbyXBxuohrEFM-gfb_GJgFQ&index=1&feature=plcp

    I would not give my car away again for 1 year to do this again but now I have it I am very pleased with the result and am enjoying it immensely. Smiley

     

     


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    3.9  GT2 2011 make over


    Re: My ultimate 997GT2 blog

    My 2012 interior makeover, some GT2RS bits with red belts to jazz up the cabin Smiley

     


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    3.9  GT2 2011 make over


    Re: My ultimate 997GT2 blog

    How could I miss that thread 'til now?... heart

    Fantastic story and car! Congrats... wink


    Re: My ultimate 997GT2 blog

    TB993tt:

    My 2012 interior makeover, some GT2RS bits with red belts to jazz up the cabin Smiley


    Not a big fan of the red interior on the RS but it is most important that you are happy. Actually forgot to thank you for your detailed response, certainly do appreciate it.

    Smiley


    Re: My ultimate 997GT2 blog

    pierre:

    How could I miss that thread 'til now?... heart

    I'm thinking the same thing.

    Thanks for the write-up TB993tt. Your GT2 looks fierce. Smiley

     


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    If I don't fly, I drive my .:RS 


     
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