Classic Mini Toolbox - CMDIY
A Classic Mini's Best Friend
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
Sustaining Membership, properly unified.
• Your membership now follows you everywhere — if you're already a Sustaining
Member through any Classic Mini DIY service, the app recognizes it
automatically. No double subscriptions, ever.
• Maintenance tracking now unlocks for every active member, however you joined.
• Members-only Discord: claim your personal invite right from the app — no
more shared links.
• Smarter subscription management that knows where you subscribed and takes
you to the right place to manage it.
• One consistent list of member benefits across every screen.
Fixes: the Discord invite no longer reappears on every launch, and member
status updates more reliably after purchase, restore, or sign-in. Now go
check your tappet clearances.
The developer, Cole Gentry, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Cole Gentry
- Size
- 28.7 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Sustaining Member $1.99
- Copyright
- © 2026 Classic Mini DIY LLC
