OK i am not sure about ur Iphone, but mine is pretty slow and very unstable....i am not sure how it would go while trying to tune a car with it but seems like Innovate Motorsport has came up with a device which you can plug your iphone into and use the iphone as a monitoring device, sounds cool...i hope it charges the phone at the same time too cuz my battery doesn't like too long. ... lol
here's the low down ----->
OT-2 “OpenTune” Interface
Coming in March 2009
The OT-2 is an OBD-II vehicle interface for Apple TM iPhone TM or iPod Touch TM and includes software performance computer, efficiency calculator, and advanced diagnostics

The Innovate Motorsports’ OT-2 “OpenTune” interface provides a link between any late-model cars or trucks and an Apple TM iPhone TM or iPod Touch TM. The OpenTune interface allows high-quality data display, logging, and analysis from any vehicle made since 1996, and integrates with Innovate air/fuel meters and other modular tuning components. The LogWorks Mobile TM software, available from the Apple TM online app store, is a full-function performance meter, even without the option OT-2 OBD-II interface.
Car computers these days are connected to hundreds of sophisticated sensors. The OT-2 allows you to “open” any car’s computer, and directly see what these sensors are measuring. Users can select multiple channels from hundreds of available parameters, and log the data up to 12 times per second. Users can also record many conditions, states, and codes as “status” channels, and reset check engine lights and other trouble codes.
Features:- OBD-II interface for any late model car- ISO 15765 (CAN), J1850 (Ford, GM), ISO 9141, and ISO 14230 (kwp2000)
- Wi-Fi communication from OT-2 Interface to Apple TM iPhone TM or iPod Touch TM
- Compatible with all Innovate MTS (Modular Tuning System) devices, including LC-1 “Lambda Cable” Air/Fuel Ratio sensor controller, LM-2 Air/Fuel Ratio meter with analog inputs, TC-4 4-channel thermocouple interface, and more.
- LogWorks Mobile TM software (a FREE application available on the Apple app store) features the following functionality:
- Performance Meter – 0-60 acceleration, HP calculation, Lateral G’s, Timer (1/8 mile, 1/4 mile, and more.)
- Efficiency Meter - Interactive efficiency calculator (MPG, GPM, and AES) Advanced Diagnostics – Record and analyze critical vehicle parameters. Read and clear DTCs (Diagnostic Trouble Codes). OT-2 required. Performance and Efficiency functions work without OT-2, however data quality and accuracy is dramatically better when utilizing the OT-2.