Porsche: 2.5L Flat-4 Turbo in the works... [RUMORS]
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This is a discussion on Porsche: 2.5L Flat-4 Turbo in the works... [RUMORS] within the New Cars/Prototypes Forums forums, part of the Community - Meet other Enthusiasts category; Porsche reportedly working on new turbocharged flat-four boxer engine? Specifics have yet to be learned, but reports say the engine ...

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    Porsche: 2.5L Flat-4 Turbo in the works... [RUMORS]

    Porsche reportedly working on new turbocharged flat-four boxer engine?

    Specifics have yet to be learned, but reports say the engine is a derivative of the current 3.8-liter six found under the rear decklid of the Carrera S, yet with two fewer cylinders. Fitted with a turbocharger, direct-injection and the automaker's VarioCam Plus, the new all-aluminum 2.5-liter flat-four will likely develop upwards of 350 horsepower and 360 pound-feet of torque. Redline should be about 7,500 rpm. Initial indications say that Porsche will only offer the new engine with its seven-speed PDK dual-clutch automatic, tuned to take advantage of the low-end torque, but a traditional six-speed manual gearbox has not been ruled out. Despite the loss of two cylinders, enthusiasts will likely embrace the new engine as it promises to be lighter, more fuel efficient and more powerful than the 2.7-liter and 3.4-liter sixes in the Cayman/Boxster today.
    Engine swap anyone?
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    Administrator RayfieldsWRX's Avatar
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    That would work well in teh buggy.
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    zax
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    I wonder how they'll approach the turbocharger packaging.


    I also see they have a timing chain... wish I had that right about now...

    EDIT: Ah crap I've been fooled! That's a Flat-6 motor!
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    Quote Originally Posted by zax View Post
    EDIT: Ah crap I've been fooled! That's a Flat-6 motor!
    Yes, please note the [RUMORS] tag. Since nothing is confirmed, they don't have a pic of the engine yet, and showed the Carrera S engine that is likely the template for this new engine.

    Still, I'd expect any derivative engine to have a timing chain as well...
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    He simply abides. SD_GR's Avatar
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    I was not crazy about Porsche's previous four, the liquid-cooled inline. I believe it used a balance shaft arrangement licensed from Mitsubishi, and the thought makes me nauseated. If the motor were to be flat, then it would not need balance shafts, but their previous flat 4s were not brilliant even at the time. We'll see.
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    Quote Originally Posted by SD_GR View Post
    I was not crazy about Porsche's previous four, the liquid-cooled inline. I believe it used a balance shaft arrangement licensed from Mitsubishi, and the thought makes me nauseated. If the motor were to be flat, then it would not need balance shafts, but their previous flat 4s were not brilliant even at the time. We'll see.
    Are we discussing the raucous motor in the 944? If so, I must mention that I LOVE that motor!
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    It took a lot of criticism in the day. Porsche purists compared it to a truck motor. Seems like it was actually pretty stout, and put out good numbers in the 951, I think.
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    He simply abides. SD_GR's Avatar
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    They took it up to 3,0 L eventually and with a big KKK turbo they made numbers. The steering was the best of any car I know.

    However I found the balance shaft set up offensive.
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    zax
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    Quote Originally Posted by SD_GR View Post
    The steering was the best of any car I know.
    This. The steering response was sublime! I would still love to own a proper 944 Turbo S
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    Administrator RayfieldsWRX's Avatar
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    The steering is supposed to be legendary...I never got a chance to drive one.
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    zax
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    Quote Originally Posted by RayfieldsWRX View Post
    The steering is supposed to be legendary...I never got a chance to drive one.
    I drove a 944 Turbo at an SCCA event years ago. Friend's friend's dog's uncle's friend's car. Per my understanding, the Turbo S handling is worlds above the Turbo... I doubt I'll ever know
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    It made the 300ZX, a contemporary in later years, feel like a van. Only the Peugeot 106 Rallye impressed me as much but that was newer and slower.

    Off topic, but the correct choice for a 2,5L sports car with the engine in front and the gearbox in back at the time was the Alfa Romeo GTV6.
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    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
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