Since the release of firmware 6.2, valet mode has offered a "fun limiting" option for handing your Model S over to anyone else (valet, spouse, teenager, etc.). I wanted to quantify how much the fun was limited. Below are comparative results for my vehicle between valet and standard modes. I used an app on my iPhone 6 called PocketDyno+ (v2.7.1) that uses the phone's accelerometers to measure time and speed and the vehicle weight to calculate power. The phone was magnetically mounted to the dash using a Steelie mount.
| Vehicle: | 2013 P-85+ | Driver only, no cargo |
| Details: | 6.2 (2.4.124) FW | 21" wheels, Michelin PS2 tires |
| Location: | 4245 ft. elevation | Flat, straight, paved road |
| Environment: | 52°F, no wind, sunny | |
| Statistic | Standard Mode :smile: | Valet Mode  |
| Max Acceleration | 0.74 g | 0.34 g |
| Max Power | 386 whp | 150 whp |
| 288 kW | 112 kW | |
| 1/4 Mile | 12.63 s | 17.16 s |
| 113.5 mph | 74.5 mph | |
| 0-60 mph | 4.03 s | 8.74 s |
| 0-100 mph | 9.23 s | N/A |
