EngineCalc vs ESR ProMax

EngineCalc is the essential toolkit for engine builders, mechanics, and motorsport enthusiasts. Whether you're building a street rod, a race engine, or modifying a performance vehicle, EngineCalc puts the math at your fingertips — with the formula shown for every calculation so you always understand exactly what's happening under the hood. CALCULATORS Piston • Piston Speed — mean piston velocity from RPM and stroke • Compression Ratio — from cylinder and chamber volumes • Rod Ratio — connecting rod length to stroke relationship • Rod Length — from block length, stroke, and deck clearance • Piston Dome Volume — dome cc needed to hit a target compression ratio • Compression Height — wristpin height from deck clearance and stroke • Cylinder Displacement — total displacement from bore, stroke, and cylinder count Power • Simple Horsepower — quick HP from RPM and torque • Torque — from horsepower and RPM • Horsepower — using MEP, displacement, compression ratio, and VE • Corrected BHP — sea-level horsepower adjusted for altitude • BHP Loss — how much power elevation costs you • Volumetric Efficiency — actual vs. theoretical airflow • Theoretical Volume Flow — maximum CFM at a given RPM • Actual Volume Flow — real-world CFM with volumetric efficiency Fuel • Air Density — available oxygen from altitude and temperature • Mass Flow — air mass moving through the engine per minute • BSFC — brake specific fuel consumption and engine efficiency UNIT CONVERSIONS Thirteen categories covering every unit an engine builder needs: Torque • Pressure • Power • Volume • Temperature • Length • Mass Speed • Force • Fuel Efficiency • Frequency • Energy • Angle Type a value in any unit and all others update instantly. Categories you use most rise to the top automatically. FEATURES • Search — jump straight to any calculator by name • Metric and Standard measurement systems — switch anytime, values convert automatically • Formulas displayed for every calculator — no black boxes • Results shown with units, and shareable to any app or message • Result history — your last stored values for each calculator • Built-in guide — contextual help for calculators and conversions, available anytime • Works completely offline — no account, no subscription, no data collected

ESR ProMax is a professional ECU tuning application designed for motorcycle enthusiasts and technicians. Connect wirelessly via Bluetooth to your ESR ECU and take full control of your engine performance in real time. KEY FEATURES • Real-Time Dashboard Monitor live engine data including RPM, AFR (Air-Fuel Ratio), TPS, ignition timing, injector pulse width, water temperature, air temperature, battery voltage, and GPS speed — all on a single screen. • Fuel & Ignition Tuning Edit injector and ignition maps directly from your phone using an intuitive 2D tuning table. Fine-tune fuel delivery and spark timing for optimal performance. • ECU Configuration Configure compensation tables, cold-start fuel, idle settings, motor sport mode, and more — all from your device. • Save & Load Profiles Save multiple tune profiles locally and switch between setups instantly. Perfect for track days vs. street riding. • Unit Support Switch between metric and imperial units to match your preference. REQUIREMENTS - Compatible ESR ECU hardware - Bluetooth 4.0 (BLE) enabled device ESR ProMax puts professional-grade ECU tuning in your pocket. Whether you're chasing peak power on the track or dialing in fuel efficiency on the street, ESR ProMax gives you the tools to get there.