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    • The naturally aspirated Flat-6 isn't dead yet - Porsche wants to rev to 9500+ rpm with next gen 992 GT3

      If you can not increase displacement and can not just shove more air into the motor what is the next best thing to do in order to get more power? Increase the redline. That appears to be Porsche's solution to squeezing more power out of their 4.0 liter flat-6.


      You may recall that some people feel the naturally aspirated flat-6 has reached the end of the line. In the current 991.2 GT3 RS Porsche did not raise the displacement over the 4.0 liters of the standard GT3 but eked out another 20 horsepower for a total of 520.

      You may also recall some magazines decided to report the next generation 911 GT3 would be turbocharged. PorscheBoost called this clickbait. We were correct.

      The head of Porsche GT engines does not think the naturally aspirated flat-6 is quite dead yet:

      Quote Originally Posted by Thomas Mader
      I don't think so. We're working on that with our team, we're looking at power, driveability, we're looking towards the future ... Developing is going on, so we will see.

      We will look at the things we have on racetrack to put it in the street car, that's our job. The point is, this makes sense, because you want to have power, driveability.

      For [the new GT3 RS], [9000rpm] is matched perfect to the whole system. Now I have to speak to my colleagues and we will have a car, and we will have 9500 revs, and matched to that all to the gearbox, then we will work on that technical side, which should be possible ... but [although] we have that engine for the racetrack, the lifetime aspect for road car is different.
      Reports of the death of the naturally aspirated flat-6 were greatly exaggerated. Porsche is looking at building a 9500 rpm steet GT3. Not a bad idea. PorscheBoost has an even better solution though.

      Source

      This article was originally published in forum thread: The naturally aspirated Flat-6 isn't dead yet - Porsche wants to rev to 9500+ rpm with next gen 992 GT3 started by Sticky View original post
      Comments 9 Comments
      1. Zombie1's Avatar
        Zombie1 -
        Click here to enlarge It will be glorious.
      1. Surquhar's Avatar
        Surquhar -
        I hope they build this motor. Then we MAY have a shot at getting a used .2 GT3.
      1. subaru335i's Avatar
        subaru335i -
        We can hope but as he said, a roadcar needs more lifetime than a racecar. If anyone can do it Porsche can but bearings don't really like being revved that high for long. Remember the previous GT3 that would throw rods and burn down? haha
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Remember the previous GT3 that would throw rods and burn down? haha
        That wasn't due to the redline though. They are doing 9k no problem.

        The S2K did 9k rpm... albeit with a smaller motor.
      1. Surquhar's Avatar
        Surquhar -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        That wasn't due to the redline though. They are doing 9k no problem.

        The S2K did 9k rpm... albeit with a smaller motor.
        Yes and I have to applaud Porsche for recognizing a fundamental design flaw and adding an additional 10 year warranty on the .1 GT3 motor.
      1. subaru335i's Avatar
        subaru335i -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        That wasn't due to the redline though. They are doing 9k no problem.

        The S2K did 9k rpm... albeit with a smaller motor.
        Like I said Im sure they will figure something out but it isn't trivial and since the stresses on the rod bolts go up with the square of the speed 9500 rpm is significant.

        What was the issue with that motor. I could have sworn it was something with the rods or rod bolts making them throw rods through the block which leaks oil on the hot headers and burn the whole thing down.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Like I said Im sure they will figure something out but it isn't trivial and since the stresses on the rod bolts go up with the square of the speed 9500 rpm is significant.
        Absolutely. RPM can kill a motor just as fast if not faster than anything else.

        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        What was the issue with that motor. I could have sworn it was something with the rods or rod bolts making them throw rods through the block which leaks oil on the hot headers and burn the whole thing down.
        https://www.porscheboost.com/content...ll-be-replaced
      1. pr3ci5n335i's Avatar
        pr3ci5n335i -
        Not the GT3 but here is some 718 Cayman GT4 action with a Flat-Six and PDK:
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by pr3ci5n335i Click here to enlarge
        Not the GT3 but here is some 718 Cayman GT4 action with a Flat-Six and PDK
        Sounds kind of muted.