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    997.2 Carrera S PDK center radiator

    Evidently an additional center radiator will be added to the 3.8 S but not the 3.6 Carrera w/ PDK for MY 2011. I am curious as to the engineering rationale behind this. Does anyone here have any insight? Is this a potential issue for 09 and 10 S owners?  Thanks in advance.


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    Carpe Diem--life is but a crack of light bounded by eternities of darkness (Nabokov)


    Re: 997.2 Carrera S PDK center radiator

    My thoughts as well. Any insider insight would be appreciated. Are we talking additional cooling for the engine or PDK? What prompted this? Retrofit available and under what circumstances is it indicated?

    Porsche needs to provide details about this ASAP.


    Re: 997.2 Carrera S PDK center radiator

    Where did you get this piece of information?

    As fas as I know not even the MY10 X51 Powerkit car uses a center radiator.


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    It's not where you're going, it's how you get there that counts

    Re: 997.2 Carrera S PDK center radiator

    It's in the post below:

    http://www.rennteam.com/forum/thread/20149535/Re_Will_there_be_MY11_GT3_GT3RS/page1.html#p20149535
     

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    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection


    Re: 997.2 Carrera S PDK center radiator

    Thank you!


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    It's not where you're going, it's how you get there that counts

    Re: 997.2 Carrera S PDK center radiator

     The PDF on that thread lists the changes. - See HERE.


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    _________________________________________________________ 

    A. Dias --- 997.2S. Previous cars: Corvette C6,  996 C4.


    Re: 997.2 Carrera S PDK center radiator

     i think that main reason is OVER heating of PDK 


    Re: 997.2 Carrera S PDK center radiator

    artur777:

     i think that main reason is OVER heating of PDK 

    Under what circumstances? There is a warning message ("transmission temperature too high") that appears in the OBC when such situation arises. Has anyone got this warning during the tenure of their cars Smiley

    It's interesting to know.


    --
    It's not where you're going, it's how you get there that counts


    Re: 997.2 Carrera S PDK center radiator

    I've taken my car on track twice, and both times, no warnings.  In fact, water & oil temps didn't show high at all.  I used manual & auto modes in Sports Plus.


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    Re: 997.2 Carrera S PDK center radiator

     What is this center radiator for? Engine coolant? Engine oil? or Transmission oil?


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    _________________________________________________________ 

    A. Dias --- 997.2S. Previous cars: Corvette C6,  996 C4.


    Re: 997.2 Carrera S PDK center radiator

    ADias:

     What is this center radiator for? Engine coolant? Engine oil? or Transmission oil?

    I remember in 996 Tips they all had middle transmission oil coolant.


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    Happy Driving

    Re: 997.2 Carrera S PDK center radiator

    Ron (Houston):
    ADias:

     What is this center radiator for? Engine coolant? Engine oil? or Transmission oil?

    I remember in 996 Tips they all had middle transmission oil coolant.

    Not strictly correct, but the effect intended was the same.
    The center radiator cooled the "engine" coolant just as the two standard side radiators did, but the 3rd. radiator was added to Tip cars because these transmissions shed more heat than manuals, leading to the Tip boxes being equipped with oil-to-water heat exchangers which passed the tranny's surplus heat on to the water coolant, which was then conducted to all three radiators at the front of the car.


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    fritz


    Re: 997.2 Carrera S PDK center radiator

     PDK cooling - this is it

    some users faces overheating in sport plus modes while racing at the track


    Re: 997.2 Carrera S PDK center radiator

    artur777:

     PDK cooling - this is it

    some users faces overheating in sport plus modes while racing at the track

     Thanks, seems reasonable.  Also does not suggest I need to run out and update my car.Smiley


    --

    Carpe Diem--life is but a crack of light bounded by eternities of darkness (Nabokov)


    Re: 997.2 Carrera S PDK center radiator

    DaveC:
     Thanks, seems reasonable.  Also does not suggest I need to run out and update my car.Smiley

    I guess you're right - if it was a major concern, there would be a service recall (wouldn't there?!)


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    Re: 997.2 Carrera S PDK center radiator

    artur777:

     PDK cooling - this is it

    some users faces overheating in sport plus modes while racing at the track

     

    Please document your comment? I have NEVER heard of this? Overheating of WHAT? PDK? Engine coolant? Engine oil?

    I call BS on your post without documentation.

    Tracked my PDK in Sport Plus and no issues at all. Have NEVER read of anyone having overheating.


    Re: 997.2 Carrera S PDK center radiator

    have you every tracked your car for a long time in SportPlus mode?

    try it for 15 mins for example and you will probably see

    Porsche is just trying to make its cars better for hard track usage

     


    Re: 997.2 Carrera S PDK center radiator

    @atur777 - I have tracked it twice, for four 1/2 hour sessions each time,  but never faced overheating problems.  I for 1 keep it in Sports Plus mode whilst on track.

    However, if you have tracked it and faced problems, then obviously there's your reason to install a thrid radiator!  So I'm sure you're going to retro-fit the 3rd radiator?


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    Re: 997.2 Carrera S PDK center radiator

    Actually, when the 997.2 came out I was surprised by the absence of the centre radiator on PDK cars and more recently on X51 cars. 996 and 997 Tip and powerkit cars had it.

    Personally, I would have liked my car to have this extra cooling, even for my peace of mind.

    I don't track the car but I did mountain ascents at near 40 degrees centigrade in the summer without any overheating warnings.


    --
    It's not where you're going, it's how you get there that counts

    Re: 997.2 Carrera S PDK center radiator

    artur777:

    have you every tracked your car for a long time in SportPlus mode?

    try it for 15 mins for example and you will probably see

    Porsche is just trying to make its cars better for hard track usage

     

    Tracked my car multiple times in Sport Plus. No overheating. Again-I have NEVER read of a driver experiencing overheating.

    So, back to the beginning, it would be great to read a post based upon the facts of this issue, not someone guessing the PDK is overheating.

    So much guessing on forums gets passed off or interpreted  as fact, it is important to make clear what is known to be and what is not. Smiley


    Re: 997.2 Carrera S PDK center radiator

    Porsche would not add the weight ,cost, assembly line  logistics  issues  and increased drag of the opening for a third radiator if there isn't a  reason. 

    One may never get an official  statement on why it was added , whether for engine/PDK/driveshaft/diff cooling or all of the above , so as to keep '09 and '10 owners from worrying/obsessing  about a specific component 's wear. They may say something generic like the heavier PDK cars benefitting from better " overall " cooling of " everything " that generates heat.

     


    Re: 997.2 Carrera S PDK center radiator

     Porsche is insuring themselves from the possible problems by installing th third radiator.. you may never face the problem, but in some very hot conditions on the track you may face it

     

    almost all heavily tuned GTRs for example include addiitional transmission cooler

    guess,for what reason?


     
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