2-Stroke Calc

2-Stroke Calc is a practical toolkit for tuners, builders and motorsport enthusiasts working on two-stroke engines — from mopeds and scooters to dirt bikes and custom builds.

Various calculators in one app:
• Port timing — with diagram from gauge measurements
• Ignition timing — degrees and millimeters before TDC
• Compression — ratio and combustion chamber volume
• Squish band — squish area and squish ratio
• Mean pressure — torque and specific power
• Counterweight factor — crankshaft counterweighting
• Variator weights — for scooters and mopeds
• Oil/fuel mix — ratio and quantities
• Carb jet — correction for altitude and temperature
• Gearbox — speeds and shift points
• Exhaust pipe — Blair expansion chamber with preview
• DC wire gauge — for vehicle electrics
• Electrolyte — for hobby zinc plating

Vehicle management:
• Master data, maintenance schedule, fuel log and costs
• Documents, MOT and insurance reminders
• Cloud sync with your account

Free & Pro:
• Free: View all calculators and vehicles, explore demo vehicle
• Pro: Edit, add and delete — one-time purchase via Google Play
• Pro modules (default): vehicles, port timing, wire gauge, electrolyte, gearbox

More features:
• All calculator results processed locally on your device
• German and English
• Light and dark theme
• Bottom navigation or side drawer
• Help, FAQ and in-app contact

Note: This app is a technical aid only. Results do not replace professional engine verification. Double-check all measurements before making changes.

Support: support@simplestsoft.com