Classic Mini Toolbox - CMDIY

Cole Gentry

In-app purchases

About this app

Transform Your Classic Mini Experience with Professional-Grade Technical Tools. The Classic Mini DIY Toolbox is the ultimate companion app for Classic Mini enthusiasts, mechanics, and restorers. Whether you're building a race car, restoring a barn find, or fine-tuning your daily driver, this comprehensive toolkit puts professional-grade calculations and technical reference data right in your pocket.

POWERFUL CALCULATION TOOLS
Compression Ratio Calculator
Optimize your engine's performance with precision compression ratio calculations. Input your bore, stroke,
head gasket thickness, deck height, and piston specifications to get accurate compression ratios. Perfect for
selecting the right pistons, head gaskets, and planning engine builds. Supports different piston dome/dish
configurations and helps you achieve your target compression for street driving or racing applications.

Advanced Gearbox Calculator
Master your drivetrain setup with comprehensive gear ratio analysis. Calculate final drive ratios, determine
speed vs RPM relationships, and understand how tire size changes affect your gearing. Essential for autocross,
track days, or highway cruising optimization. Compare different transmission and differential combinations to
find the perfect setup for your driving style.

SU Carburetor Needle Configurator
Navigate the complex world of SU carburetor tuning with confidence. Our extensive needle database includes
detailed specifications for hundreds of needle profiles. Get tuning recommendations based on your engine
modifications, altitude, and performance goals. Visual needle profile charts help you understand how different
needles affect fuel delivery across the RPM range.

COMPREHENSIVE REFERENCE DATABASE

Torque Specifications
Never guess at bolt torques again. Our complete database covers engine internals, suspension components,
drivetrain assemblies, and body hardware. Organized by system and component, with both metric and imperial
values. Includes special procedures and notes for critical fasteners.

Common Clearances & Tolerances
Professional-grade clearance specifications for engine rebuilds. Covers bearing clearances, ring gaps, valve
guides, timing chain stretch limits, and wear tolerances. Essential for determining what's serviceable and
what needs replacement during rebuilds.

WHY CLASSIC MINI ENTHUSIASTS CHOOSE OUR APP
- Offline Functionality - All calculations and reference data work without an internet connection
- Professional Accuracy - Data verified against factory service manuals and technical bulletins
- Regular Updates - Continuously expanded database with new parts and applications
- User-Friendly Interface - Clean, intuitive design optimized for garage and workshop use
- Comprehensive Coverage - From 1959 Austin Seven to 2000 Rover Mini and beyond
- Expert Curation - Content developed by experienced Classic Mini mechanics and racers

PERFECT FOR:
- Home mechanics working on their own cars
- Professional shops specializing in classic BMC vehicles
- Racing teams optimizing performance
- Restoration specialists maintaining authenticity
- Parts suppliers verifying compatibility
- Classic Mini clubs and technical forums

What’s new

Fixes for Sustaining Members:

• If you support us through Patreon, the website, or a complimentary membership, the app now correctly recognizes you — maintenance tracking unlocks on sign-in instead of asking you to subscribe again.
• Restore Purchases now also checks your membership on our servers, not just Google Play.
• Fixed a behind-the-scenes issue that kept the app from receiving configuration updates.

Thanks for supporting Classic Mini DIY!