Motty AFR Tuner with DIRT Software

Eliminates the need for an Engine dyno for fuel mapping!

 custom mapping a typical naturally aspirated fuel injected motorcycle engine.

The Motty AFR Tuner is aimed at the motorcycle engine enthusiasts and offers a never before seen flexibility and level

of control over the fueling of the engine.

Modifying motorcycles for racing or street riding was always popular with their owners. Installing aftermarket performance

 components such as exhaust systems, air filters or even internal engine modifications are very common. However the stock

engine management systems found on the motorcycles of today do not compensate for the improved air flow of these

aftermarket components which leads to the engine being operated out of its optimum air-fuel mixture range. In most cases

this only means that the output power is below what the given modification would be capable of with correct mixture ratio,

 but in extreme cases it can lead to engine damage from internal overheating or detonation.

The Motty AFR Tuner was created to solve this problem. It automatically controls the air-fuel ratio of the intake charge

 according to the user defined target air-fuel mixture ratio map and it continuously maintains this even if new modifications

are made to the motorcycle or slow changes like air filter clogging or engine wear take place.

Main features

• Digital wideband lambda sensor controller for high precision air-fuel mixture ratio measurement. The wideband
• oxygen sensor technology allows measuring the air-fuel mixture ratio accurately in all possible engine conditions from
• idle to full load.
• Fuel injection control with two high resolution 14x73 cell fuel injector control maps. Off grid map values are calculated
• with 3D interpolation and the map resolution is especially detailed in the low throttle regions to deliver the smoothest off
• throttle engine response.
• Automatic fuel injection self mapping for providing the engine with user defined air-fuel mixture ratios in all engine

  conditions. The two fully user editable target air-fuel ratio maps share the same 14x73 cell resolution and sophisticated

  interpolation algorithms as the injector maps allowing optimizing the engine for different goals in different engine conditions.

   For example a rich mixture for best power in the high load areas, a leaner mixture for good fuel economy in cruising

  conditions and a richer mixture for good throttle response in the low throttle regions.

  The automatic self mapping feature uses a real-time wide band lambda measurement and the fuel injector control capability

  of the Motty AFR Tuner to progressively reach the target air-fuel ratio by simply riding the motorcycle.

• Integrated data logger for recording the most important engine parameters: air-fuel ratio, engine speed, throttle position,
•  gear position (on models equipped with the sensor), coolant temperature, vehicle speed and an external 0-5V user input.
• Top speed derestriction for Suzuki GSX-R1000 and GSX1300R Hayabusa motorcycles. The maximum engine revolution
•  of these motorcycles is limited to a lower value in top gear by the ECM. The Motty AFR Tuner can overcome this restriction
•  by enabling the full RPM range also in the 6^th gear.

Supported motorcycle models

cylinders, has to be equipped with high impedance injectors, and the design of the exhaust system should route the exhaust gases from

all cylinders into an exhaust collector pipe where the wideband lambda sensor can be installed.

These requirement are met by all current Japanese inline motorcycles with either the stock or an aftermarket exhaust system with

lambda sensor bung.

The Motty AFR Tuner is sold with a generic wiring harness which requires custom installation to the wiring harness of the vehicle.

The AFR Tuner comes with the following software tools:

• AFR Tuner Configurator
• AFR Tuner Log Viewer
• AFR Tuner Log Converter

AFR Tuner Configurator

The AFR Tuner Configurator is a software application for providing the graphical user interface for interacting with the AFR Tuner.

It handles the following main tasks:

• displaying the current status of the AFR Tuner and the motorcycle
• controlling the current state of the AFR Tuner
• editing the user settings
• editing the maps
• uploading/downloading the settings to/from the AFR Tuner
• saving/loading the settings to/from a file on the PC
• downloading the data logger data and saving it to file on the PC
• calibrating the AFR Tuner for the wideband lambda sensor and the motorcycle
• displaying faults detected by the AFR Tuner
• updating the firmware in the AFR Tuner

 

AFR Tuner Log Viewer

The AFR Tuner Log Viewer is the software application for plotting the downloaded data from the data logger on a computer screen.

 

AFR Tuner Log Converter

The AFR Tuner Log Converter is a command line tool for the expert users for extracting data from the data logger files.

The log converter can make conversions between the data logger files and text files.

This tool can be used to export data from an .atlog file to be used in a spreadsheet application or for further analysis.