PerfectPower vs PerfExpert Usage & Stats

PerfectPower, the automotive reference on-board system in power and performance measurements! PerfectPower is, in the form of a revolutionary smartphone application, the automotive reference on-board system in power and performance measurements, the one with the best price / reliability of results / variety of features / operational independence ratio! Seven major goals: - Measure the standardized engine power (DIN, CEE, SAE, JIS, ISO) of your car - Measure the performance of your car (accelerations, runs flying start, max speed, braking -soon available-) - Simulate the performance of your car (accelerations, runs flying start, max speed, ideal max revs) - Perform engine development with the same efficiency as on chassis dynamometer - Being able to calculate the gearbox ratios by rev calibration (as on chassis dynamometer) (soon available) - Being able to measure the freewheeling losses (soon available) - Measure lap times on track And it achieves all this with an exceptional accuracy established theoretically AND proven in practice of +- 1% for power measurements, which are both its speciality and the most interesting measurements of all in automotive physics! Such accuracy is made possible by the accurate, permanent, and clever combination of the informations of the phone accelerometer and the GPS, knowing how to take the best of both sensors while eliminating the specific disadvantages when used individually. What - useful precision - is not done without efforts: it is the result of hundreds of hours of work, but also of high skills in physics and mathematics, that myself David Mettey creator of the application have, both by my training (engineer with two Bac +5 degrees in Physics) and my experience ((calculation engineer at Citroen Sport and test bench developer at Air France Industries). Such accuracy can even be further improved and go well below the % by using the best external GPS on the market, the RaceBox Mini & Mini S (25 Hz & 0.3 m average horizontal accuracy thanks to the use of differential techniques), soon driven by PerfectPower (November 2024). Of course, there are a certain number of rules to follow to achieve optimally accurate measurements (the most important being to perform measurements in both directions of the road -and on the same portion- and to ask PerfectPower to average them in order to eliminate the effects of road slope and wind), BUT when these rules are well followed, PerfectPower has proven that: - It was as accurate for power measurements as the best chassis dynamometers (Rotronics -France-, Maha -Germany-, DynoJet -USA-) - It was as accurate for acceleration measurements as the best external GPS, the RaceBox Mini & Mini S itself - It was significantly more accurate than any other smartphone application in the field It's so true that I didn't hesitate to launch a friendly but very clear challenge of 10,000 euros & dollars on May 1, 2024 on this subject, and ideally I would like an American or an American company to take it up, simply because I love the USA and New York in particular where I live 50% of the time, and once this challenge is won I will have no trouble settling there permanently! All information on all this on the official website www.perfectpower.ch

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PerfExpert

Turn your smartphone into a powerful onboard dyno! Measure your car’s real engine power and torque with 2% accuracy — all by performing a simple acceleration! Verify the effectiveness of your tuning, remaps, or upgrades with an independent, objective, and affordable solution. ------------- What is PerfExpert? PerfExpert – Car Onboard Dyno & Timer is a professional-grade app that lets you measure your car’s real performance: • Engine power & torque curves • 0–60 mph / 0–100 km/h acceleration times • Quarter mile / 400 m times, and more. All tests are performed using just your phone — no connection to your car required. Results come in detailed reports with interactive charts. ------------- How does the dyno work? 1. Create your car profile Enter key specs like curb weight, tire size, and displacement. If you’re unsure, the app helps you find them. 2. Mount your phone securely No need for OBD or external sensors. PerfExpert uses your phone’s internal sensors to capture acceleration accurately. 3. Perform a full-throttle pull On a flat, straight road, accelerate from low revs to redline in one gear — done! Note: Dyno tests are not compatible with automatic gearboxes that lack a manual mode. ------------- What can you do with PerfExpert? • Evaluate ECU remaps, chip tuning, and intake/exhaust mods • Track changes after hardware upgrades or chassis setup changes • Share dyno reports with your tuner or friends • Export your runs as interactive charts and raw data ------------- Sample reports & FAQ • Featured results: https://www.perfexpert-network.com/results/featured • FAQ: https://www.perfexpert-app.com/faq ------------- Join the community • Facebook page: https://www.facebook.com/PerfExpert • User group & support: https://www.facebook.com/groups/perfexpert/ ------------- Key features • Dyno Test: Accurately measure horsepower and torque. Includes rev limiter detection and power loss modeling. • Correction standards: Apply standard corrections (DIN, SAE, ISO, JIS, CEE) using real-time ambient conditions (pressure, temperature, humidity). • Timed Run Test: Measure acceleration and distance milestones: 0–60 mph, 0–1/4 mile, 0–100 km/h, and more. • High-frequency sensor use: Maximum precision thanks to high-rate accelerometer sampling and advanced smoothing. • Connect to external GPS devices like RaceBox Mini, Mini S, Micro, RaceBox.ru, or VBox Sport for even higher accuracy and features like rolling start dyno runs (requires PerfExpert Pro su). • Share results online with a public web link, viewable on the PerfExpert Network • Custom units: Supports a wide range of units: Hp, Ch, Nm, Ft.lb, m/s², °C, psi, km/h, mph, m, ft, etc. • Results can be exported as TSV data file or PNG image. Privacy Policy: https://www.perfexpert-app.com/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/