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    Carrera GT Dynamometer Test

    My local Porsche Club hosted a Tech Session yesterday which included an opportunity to have one's car run on the dynamometer. I thought the results might be of interest. Two runs - #1 Max. Power = 541.3, Max. Torque = 377.3, Run #2 Max . Power = 532.1, Max. Torque = 384.6. Only an apporximate 10% loss in power between the flywheel and road, and an approximate 13% loss in torque. The speedometer read 210 mph. My car has approximately 4,000 miles on the odometer. Terrific results.

    Re: Carrera GT Dynamometer Test

    You must be the first CGT owner in the world to do such test thanks for sharing

    J.Seven

    Re: Carrera GT Dynamometer Test

    Wow--4,000 miles already--glad to see you're driving it a lot!

    Re: Carrera GT Dynamometer Test

    Thanks for sharing the info.

    Re: Carrera GT Dynamometer Test

    Larry, do you have a graphic printout of the dyno run that you could post here - I'd love to see it.

    One question - considering that horsepower is derived mathematically from torque, how is it possible that the percentage loss is different - it really can't be?

    I assume it means simply that loss (13%) is greater at the rpm where max torque is attained than the loss (10%) where max power is attained. Which suggests that there is more loss at lower rpm than at higher rpm, which seems counterintuitive. I'm a bit confused.

    Anyway, fantastic results - that car must be awesome to drive. Love to see the dyno chart if you have it.

    Re: Carrera GT Dynamometer Test

    Quote:
    J.Seven said:
    You must be the first CGT owner in the world to do such a test




    I'll bet he is.

    Re: Carrera GT Dynamometer Test

    SpeedGeek,

    I too had the same question after reading Larry's comments. I do not think it is industry practice to quote two different percentages of loss from the flywheel to the rear wheels. I believe that Larry calculated what the approximate percentage difference was from the factory quoted numbers. Someone please correct me if I anything I have said is incorrect.

    Larry,

    Thank you for sharing this info. I would also love to see a dyno graph if you have it.

    Greg A

    Re: Carrera GT Dynamometer Test

    Larry,

    I assume the readings are uncorrected as noted. RWHP & RWT.

    True?

    Re: Carrera GT Dynamometer Test

    Yes Mike, that was my understanding.

    Re: Carrera GT Dynamometer Test

    I wouldn't have a clue as to how to post it. If you give me a fax number I can send it to you and then you can post it. OK.

    Re: Carrera GT Dynamometer Test

    OK.

    Greg A

    Re: Carrera GT Dynamometer Test

    Here are Larry's Dyno sheets. Sorry for the delay.

    1.






    Greg A

    Re: Carrera GT Dynamometer Test

    2.

    Re: Carrera GT Dynamometer Test

    Here is the original graph in Black & White

    3.

    Re: Carrera GT Dynamometer Test

    Last one. Same graph in color. Color was added using MS Paint, so it isn't the best job in the world.

    4.

    Re: Carrera GT Dynamometer Test

    Thank you for taking the trouble, Larry and Teflon. The bhp seems to drop off past the 8400 redline. At what rpm does fuel cutoff occur?

    Re: Carrera GT Dynamometer Test

    Thanks, Larry and Teflon. Much appreciated.

     
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