Log Dyno Logger vs Powertora

Log Dyno Logger is a dedicated datalogger for Log Dyno, which measures Horsepower and Torque from your datalogs, and uses an EXTERNAL GPS device. Log Dyno Logger uses GPS devices, and datalogs speed, which Log Dyno uses to calculate back RPM from wheel sizes, gear ratios and so on. All you have to do, is select a single gear, usually 3rd gear, start datalogging, rev the car from low rpm to redline, just like you would on a dyno, let off or slow down and stop the datalogging. You can then send the datalog straight to Log Dyno for measurement. Supported GPS Devices: -PGear 610 -RaceBox Mini Originally Log Dyno was designed to work from OBD datalogs, but with high power applications, traction is an issue and causes spikes in the rpm curve, which also introduces spikes in the measurement curve. Using speed instead of rpm in the datalog ensures that the spikes are not present, even if you run into wheelspin. If you have any questions, feel free to contact me any time.

Powertora turns your iPhone and a Bluetooth GPS sensor into a rolling-road dyno. Do one full-throttle pull followed by a coast-down on a quiet road, and Powertora calculates your car's real power and torque curves — crank-equivalent, in metric PS — from how it accelerates and how it slows. No rollers. No dyno shop. Just your car, a GPS sensor, and a stretch of road. MEASURE • Real power and torque curves vs RPM • Crank-equivalent output — the coast run captures drivetrain loss automatically • A quality score on every run, so you know how much to trust it • Works with RaceBox, Dragy and other NMEA GPS sensors FREE FOREVER • Unlimited measurement • Shareable power-curve card • Web reports POWERTORA PRO • PDF dyno reports with quality breakdowns • Merge 3–6 runs into one high-confidence curve • Before/after comparison exports • Multi-GPS fusion for extra accuracy • Unlimited garage • Road maps — curvature, grade and wind per run • Cloud backup and recovery HOW IT WORKS Pick your car, enter its weight, and drive: one pull to the limiter, then coast back down on the same road. Powertora does the physics. Measuring is free — upgrade to Pro for the full tuning workflow. Powertora Pro is an auto-renewable subscription (monthly or yearly) or a one-time lifetime purchase. Payment is charged to your Apple Account; a subscription auto-renews unless turned off at least 24 hours before the period ends, managed in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://powertora.app/privacy