关于 PerfExpert - Measure, analyze and improve your car performancesh
PerfExpert Onboard Dyno app allows you to measure accurately horsepower and torque by your own. Making your own dyno test at any time is now simple and reliable : create your car profile, mount your phone firmly in your car and accelerate from low rev to max engine rpm, holding the same gear : that's it! Don't wait to test your car with PerfExpert and compare your tuning effectiveness!