Updating
2TExc - 2T Exhaust Calculator
Released: 2025-12-09
© 2026 Creative Media Schubert / Christian Schubert
Description
2TExc is the complete professional toolset for designing, analyzing, and tuning 2-stroke engines. From expansion chambers to diffuser and baffle cone geometry, port and ignition timing, intake resonance, gearing, and powerband – every calculation is precise, fast, and based on validated real-world formulas.
Built for tuners, mechanics, racers, and enthusiasts who demand engineering-grade accuracy. Suitable for classic engines, modern racing setups, and custom-built projects across moped, scooter, motorcycle, kart, and competition engines.
Unlike generic calculators, 2TExc covers the entire two-stroke workflow: exhaust design, reverse analysis of existing systems, intake resonance tuning, port and ignition timing evaluation, and drivetrain matching. All modules interact logically for reproducible, consistent results.
Key Features:
1. Exhaust Calculator – Full expansion-chamber geometry, tuned length, cone angles (diffuser & reflector), diameters, 1- & 3-stage layouts, stinger plus restrictor. Precisely calculate resonance behavior and wave timing.
2. Cone Design – Build diffuser & baffle cones, headers, and transitions. Convert data to flat sheet metal to exact final exhaust components.
3. Reverse Exhaust Calculator – Calculate tuned RPM, chamber volume, ratios, and angles from existing exhausts. Compare, verify, and optimize performance.
4. Ignition Timing + Gas Wave Calculator – Convert ignition timing BTDC from degrees to millimeter. And Calculate exhaust pulse velocity under variable temperatures using proven formulas.
5. Port Timing + Reverse Calculator – Analyze exhaust, transfer, boost, and intake timings for optimal RPM tuning and powerband shaping. Alternatively, enter the desired port timings to get the exact port dimensions in millimeters.
6. Intake Resonance – Align intake pulses with exhaust harmonics for improved cylinder filling and throttle response, including boost bottle volume and resonance frequency.
7. Gear Ratio Calculator – Set ideal gear ratios, RPM transitions / RPM matching, acceleration, and top speed.
Why 2TExc?
• Complete 2T workflow in one professional tool
• Based on validated formulas and real engine data
• Predictable, reproducible results
• Projects can be saved, opened and shared with users
• 100% offline, no ads
• Fast, clean interface with instant results
• Trusted by tuners, mechanics, racers, and performance enthusiasts
Download 2TExc now and tune your two stroke engine with precision, repeatability, and confidence.
What's New in Version 2.0.0
BIG UPDATE:
• PROJECTS CAN NOW BE SAVED / OPENED & SHARED with 2TExc users
• Opened projects will return to the language & module they were saved in
• Language switches won't result in data loss anymore
EXHAUST MODULE:
• Direct data transfer to CONE DESIGN
• Added optional “Header Connection Diameter” to support cylinders with restricted exhaust outlet geometry
• Improved calculation consistency when connection diameter constraints are defined
INFORMATION:
• Refined technical descriptions for improved clarity
GENERAL:
• General performance improvements, UI optimizations & minor bug fixes
Seller
Name
Christian Schubert
Information
Developer
Categories
Version
2.0.0
Size
42.9 MB
Game Center
No
VPP Device Licensing
Yes
Rating
Rated: 4+
Compatibility
iOS 15.1 or later
Devices
iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE (2nd generation), iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 12 mini, iPhone 13, iPhone 13 Pro, iPhone 13 Pro Max, iPhone 13 mini, iPhone SE (3rd generation), iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 16e, iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, iPad (5th Generation) Wi-Fi, iPad (5th Generation) Wi-Fi + Cellular, iPad (6th generation) Wi-Fi, iPad (6th generation) Wi-Fi + Cellular, iPad Pro, iPad Pro (Cellular), iPad Pro (9.7-inch), iPad Pro (9.7-inch) (Cellular), iPad Pro 12.9-inch (2nd generation), iPad Pro 12.9-inch (2nd generation) Wi-Fi + Cellular, iPad Pro (10.5-inch), iPad Pro (10.5-inch) Wi-Fi + Cellular, iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro 12.9-inch (3rd generation), iPad Pro 12.9-inch (3rd generation) Wi-Fi + Cellular, iPad Air, iPad Air (Cellular), iPad Air 2, iPad Air 2 (Cellular), iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPad mini Retina, iPad mini Retina (Cellular), iPad mini 3, iPad mini 3 (Cellular), iPad mini 4, iPad mini 4 (Cellular), iPad mini (5th Generation), iPad mini (5th Generation) Wi-Fi + Cellular, iPad (7th generation) Wi-Fi + Cellular, iPad Pro 11-inch (2nd generation), iPad Pro 11-inch (2nd generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (4th generation), iPad Pro 12.9-inch (4th generation) Wi-Fi + Cellular, iPad Air (4th Generation) (Wi-Fi), iPad Air (4th Generation) (Wi-Fi + Cellular), iPad (8th generation) Wi-Fi, iPad (8th generation) Wi-Fi + Cellular, iPad Pro 11-inch (3rd generation), iPad Pro 11-inch (3rd generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (5th Generation), iPad Pro 12.9-inch (5th Generation) Wi-Fi + Cellular, iPad (9th Generation), iPad (9th Generation) Wi-Fi + Cellular, iPad mini (6th Generation), iPad mini (6th Generation) Wi-Fi + Cellular, iPad Air (5th generation), iPad Air (5th generation) Wi-Fi + Cellular, iPad Pro 11-inch (4th generation), iPad Pro 11-inch (4th generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (6th generation), iPad Pro 12.9-inch (6th generation) Wi-Fi + Cellular, iPad (10th generation), iPad (10th generation) Wi-Fi + Cellular, iPad Air 11-inch (M2) Wi-Fi, iPad Air 13-inch (M2) Wi-Fi, iPad Air 13-inch (M2) Wi-Fi + Cellular, iPad Pro 11-inch (M4) Wi-Fi, iPad Pro 11-inch (M4) Wi-Fi + Cellular, iPad Pro 13-inch (M4) Wi-Fi, iPad Pro 13-inch (M4) Wi-Fi + Cellular, iPad mini (A17 Pro) Wi-Fi, iPad mini (A17 Pro) Wi-Fi + Cellular, iPad (A16) Wi-Fi, iPad (A16) Wi-Fi + Cellular, iPad Air 11-inch (M3) Wi-Fi, iPad Air 11-inch (M3) Wi-Fi + Cellular, iPad Air 13-inch (M3) Wi-Fi, iPad Air 13-inch (M3) Wi-Fi + Cellular, iPad Pro 11-inch (M5) Wi-Fi, iPad Pro 11-inch (M5) Wi-Fi + Cellular, iPad Pro 13-inch (M5) Wi-Fi, iPad Pro 13-inch (M5) Wi-Fi + Cellular, iPod touch (6th Generation), iPod touch (7th generation)
Languages
English
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