ggraber

I recently tried to dyno my 2013 991 S on a 2WD Mustang dyno (trying to get RWHP for Porsche Club classification). The ECU clearly doesn't like this, as the rear wheels are spinning and the front wheels not. We disabled the PSM as well. The car goes into a limp mode, reduces power output, reduces power steering effort, prohibits manual shifting in any mode (normal, sport, sport plus) and all the fault codes start popping up. Needless to say I could not get a proper dyno pull (showed just a little over 200 HP at the wheels, when I have over 400 HP at the crank (400 HP stock plus GIAC ECU flash and AWE exhaust).

I am assuming that the car needs a 4WD dyno then, or a Porsche Scanner tool to reprogram to allow dyno testing? Is there a way to set the ECU/coding to allow a dyno test on a 2WD dyno?

Thanks