The following changes were made in release 12.1:

- Suspension geometry calculation improvements
- Minor reliability improvements and bug fixes

The following changes were made in release 12.0:

- Electric vehicle (EV) support
- Added 15 EV calculations
- Added 17 EV graphs
- Added range calculation for fuel-powered vehicles
- Minor cosmetic changes and bug fixes

The following changes were made in release 11.10:

- Improved accuracy of turbocharger compressor map calculations
- Minor cosmetic changes and bug fixes

The following changes were made in release 11.9:

- Improved correlation of anti-dive outputs in 4-link simulation
- Improved battery calculation self-discharge rate temperature compensation
- Minor cosmetic changes and bug fixes

The following changes were made in release 11.8:

- Fixed anti-dive outputs
- Added tire radius input to Chassis Weights calculation
- Use drivetrain loss for additional calculations
- Minor cosmetic changes and bug fixes

The following changes were made in release 11.7:

- Added Loan Payment calculation and graph
- Increased tire pressure limit
- Minor cosmetic changes and bug fixes

The following changes were made in release 11.6:

- Fixed several conversion pages
- Improved several optimization pages
- Fixed highway commute cost input
- Changed top speed redline unit specifier
- Fixed cam item input precision
- Improved TO4-H3 compressor map flow scale

The following changes were made in release 11.5:

- Specify individual air/fuel ratios for each primary fuel type
- Corrected specific energy value of ethanol fuel
- Improved air density calculations
- Improved density conversions

The following changes were made in release 11.4:

- Added piston weight input to piston motion calculation
- Added piston weight input to cycle calculation of engine simulator
- Added piston force output to piston motion calculation
- Added piston force output to cycle calculation of engine simulator
- Added acceleration g-force output to piston motion calculation
- Added acceleration g-force output to cycle calculation of engine simulator
- Added piston force to piston graph
- Added force conversions
- Added braking weight transfer calculation
- Added drivetrain loss input to acceleration input and acceleration simulation
- Added drivetrain loss input to going calculation, and top speed calculation
- Added spark advance and air fuel ratio inputs to octane requirement calculation
- Minor adjustments and optimizations
- Bug fixes

The following changes were made in release 11.3:

- Added battery calculation

The following changes were made in release 11.2:

- Added 3 maintenance reports
- Additional outputs for piston motion calculation and piston combined graph
- Improved formatting of calculation reports
- Customizable background color for calculation reports
- Added horizontal reference guidelines to graphs
- Enabled connecting rod length of at least 60% of stroke (instead of 100%)
- Added thousands separator to conversion pages
- Added rod / bore angle graph
- Added rod / crank angle graph
- Enhanced labels for fuel consumption graph
- Windows 8 and Windows 8.1 support

The following changes were made in release 11.1:

- Added maintenance tasks and maintenance history tracking
- Driveshaft speed calculation and graph
- Simplified effective compression calculation
- Consolidated octane requirement calculation
- Added date support to fuel consumption calculation
- Show cam velocity and acceleration in camshaft calculations
- Enable separate tire frequencies for suspension rates calculation
- Added statistics line graph and statistics bar graph
- Send lap timer results to statistics calculation and graphs
- Additional outputs for piston motion calculation
- Increased piston speed and position accuracy in piston motion calculation and graphs
- Drag and drop support in data files tool window
- Minor bug fixes

The following changes were made in release 11:

- New user interface with visual styles and skin support
- Choice of tabbed or MDI windows
- New, customizable data files, calculations, and graphs windows
- Organize your data files into folders
- Adjust output area with splitters in most calculation windows
- Enable up to ten vehicles at a time and allow customization in the drag race simulation
- Detailed status bar in data log viewer
- Added a Clear button to math from reference calculations
- Added body outline to 4-link suspension geometry simulation
- Added mouse wheel support to 4-link suspension geometry simulation
- Improved graphics and adjustable lights off time for Formula One practice start
- Improved graphics and customizable times for Formula One practice start
- Improved graphics for drag race practice tree
- Added filter option to event log report
- Enhanced data log viewer statistics
- Fuel consumption graph
- Tire temperatures bar graph
- Tire temperatures line graph
- Camshaft graph can now display velocity and acceleration
- Search for data files, calculations, and graphs by a name or part of a name
- Added tire size selector
- List tires with similar dimensions in tire size calculation
- List dimensions for unloaded, static rolling, and dynamic rolling conditions in tire size calculation
- Use tire pressure for calculating rolling radius, rolling diameter, rolling circumference, and revs per distance in tire size calculation
- Use speed for calculating dynamic rolling radius, dynamic rolling diameter, dynamic rolling circumference, and dynamic revs per distance in tire size calculation
- Added output data to the steering input window
- Optionally view static chassis outline in A-arm suspension simulation and strut suspension simulation
- Show front and rear braking force percentage in the Braking force calculation
- Add idle RPM and maximum RPM inputs to engine power curve input
- Simplified engine power curve input reset logic
- Improved animation for acceleration plot
- Color-code input values that are out of range
- Conversions are now in a modeless window, so now you can open multiple conversions windows, arrange them with other windows, etc.
- Angle conversions
- Number conversions
- Convert between weight and volume of water

The following changes were made in release 10.5:

- Send your data input values directly to their conversion pages
- Send calculated values directly to their conversion pages
- Cost calculations
- Fuel cost calculation
- Driving costs calculation
- Fuel efficiency conversions
- Added BFSC inputs to going and top speed calculations
- BFSC oputputs in Metric and English units
- Fixed problem with first click not always activating calculation window's output list
- Minor bug fixes

The following changes were made in release 10.4:

- Multiple enhancements to 4-link suspension geometry simulation, including support for brackets with multiple holes and calculation of anti-squat geometry
- Support for more data logging sets (20 instead of 5)
- View race strategy settings in data log viewer
- Race strategy graph
- Use friendlier time format in lap timer statistics
- Corrected brake line pressure formula
- Reduced minimum top gear ratio
- Minor bug fixes

The following changes were made in release 10.3:

- Improved accuracy for the A-arm suspension simulation and the strut suspension simulation
- Improved accuracy for Ackermann steering intersection point in steering geometry simulation
- Added optimizations for turn-in / steering response, directional stability, and maximum engine speed
- Added display of default value to range tips
- Improved default boost curve
- Minor bug fixes

The following changes were made in release 10.2:

- Cornering weight transfer calculation
- Cornering weight transfer graph
- Improved graphics for 4-link suspension geometry simulation, A-arm suspension geometry simulation, and strut suspension geometry simulation
- Minor bug fixes

The following changes were made in release 10.1:

- Shift points can now be calculated by torque curve or by torque peak RPM
- Shift point combined graph includes engine RPM, road speed, engine torque, and transmission torque
- Lap timer results can now be sorted by lap number or lap time
- Lap timer statistics can be viewed by lap number or lap time
- Improved graphics, adjustable target size, and simultaneous result display for reflex tester

The following changes were made in release 10:

- Easy fractional value entry
- Brakes calculation
- Braking force calculation
- Brake caliper piston area calculations
- Brake pedal ratio calculation
- Road grade input added to braking time and distance calculation
- Revert to default data command for all calculation windows
- Density conversions
- Convert air flow between flow by mass and flow by volume
- Data file details report
- Maximum tire pressure increased to 80 PSI

The following changes were made in release 9.5:

- Built-in facilities for adding, editing, and aligning turbocharger compressor maps
- Ackermann steering guide lines 90 degrees from wheels in steering geometry simulation
- Various enhancements to the steering geometry simulation
- Resizable graph setup dialog

The following changes were made in release 9.4:

- Improved alignment capabilities for turbocharger compressor maps
- Alignment aids and other visual improvements for compressor map calculation
- Several improvements to steering geometry simulation
- Display toe angle and distance in steering geometry simulation
- Convert toe settings between angle and distance
- Enable measuring toe at any radius instead of just at tire tread
- Range tips for all inputs in all calculation windows
- Enabled renaming of open data files
- Mouse wheel support for suspension geometry simulations
- Added g-force to acceleration conversions
- Added a conversions button to the toolbar
- Show favorite calculations and graphs on menus
- Added a bar graph for the lap timer
- Full Unicode conversion
- Minor bug fixes and visual enhancements

The following changes were made in release 9.3:

- Print any calculation window
- Compressor map mouse pointer guide lines
- Compressor map RPM range lines
- Turning circle diameter calculation
- Drag race simulation
- Simplified data entry for the fuel consumption calculation

The following changes were made in release 9.2:

- Conversions
- Fuel consumption calculation
- Additional details for engine simulator valve area calculation
- Additional details for engine simulator valve lift calculation
- Metric input support for polar moment of inertia calculation
- Minor bug fixes and performance improvements

The following changes were made in release 9.1:

- Performance optimizations
- Boost curve
- Compressor map enhancements
- Drag race practice tree now includes rollout time, trans brake delay time, and vehicle delay time
- Minor bug fixes

The following changes were made in release 9:

- Completely new architecture using latest Microsoft development tools
- No copy protection or required registration
- Improved graphics
- Data file archive option makes it easy to create backups
- Safer, more robust file handling routines
- New setup program using latest installer technology
- Show tire outlines in addition to wheel center lines in A-arm suspension simulation and strut suspension simulation
- Permanently save lap timer results and notations in data files
- Permanently save inputs from race strategy settings in data files
- Wheel back spacing calculation
- Delete data files to recycle bin instead of permanent deletion
- 3 new reports
- Made internal functionality more secure
- Numerous bug fixes and improvements based on user feedback and intensive testing
- Windows Vista and Windows 7 support including User Account Control