I'm not referring to on the racetrack or for best times but in general. Does running the AC effect performance at all by taking away anything from the engine? 1%? 5%? 20%? Dumb question?
0-60 would not be a good indicator at all any way. These cars have too much power to get its full potential to the ground for a 0-60 run on the street, regardless if ac is on or not.I actually wondered that myself yesterday. My 0 to 60 best time is still the same 3.7 seconds according to the dash readout, whether the A/C is on or off.
FINALLY, an answer from experience.The AC compressor gets turned off at WOT. If you do a wot run with the AC on, you will notice it get less cold for a minute after the pass then it will kick in again. So no performance loss at WOT at least. Part throttle, there will be parasitic drag. Not sure what the HP difference would be though at any given pedal input/rpm.
The REAL REASON not to use your AC at say the drag strip is you will be dripping condensation from the condenser all over the starting line.