Suggested Add-Ons
All Throttles
Select the rest of the components needed to equip your system
Comms. Cables
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 | R520,00 |
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 | R560,00 |
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MAP Sensors
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 | R550,00 |
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 | R550,00 |
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TXW Harnesses
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 | R210,00 |
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 | R240,00 |
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Dash Display
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 | R1 620,00 |
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| R211,00 |
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Mobile Tuning App (Android)
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 | R395,00 |
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The Spitronics Electronic Throttle Control (ETC) system is a standalone electronic throttle controller designed for accurate, smooth, and reliable control of electronic throttle bodies.
ETC goes beyond conventional Throttle-by-Wire by combining precise pedal-to-throttle control with Idle Speed Control and engine-protection functions. The throttle response can be tuned to suit the application, from smooth progressive road use to a more direct performance response.
The system uses dual pedal and throttle position sensors for safety monitoring and includes real-time diagnostics through the Cosmos software.
Main Features
- High-resolution electronic throttle control
- Adjustable Pedal Response Graph
- Electronic Idle Speed Control
- RPM-based Throttle Limiting
- MAP / Boost Throttle Protection
- Coolant Temperature Throttle Protection
- Cranking and cold-engine throttle control
- Adjustable throttle motor response and power
- Dual TPS safety monitoring and diagnostics
- Multiple Tune support
- Real-time monitoring and fault codes
- Full setup and calibration through Cosmos software
MAP / Boost Protection
The ETC can monitor manifold pressure using a MAP sensor. The MAP Throttle Limit Graph allows the tuner to progressively reduce the maximum permitted throttle opening as manifold pressure increases.
This provides an additional layer of protection for turbocharged and supercharged engines without simply switching the throttle closed at a fixed boost pressure.
Engine Protection
RPM, coolant temperature, and manifold pressure can each place a limit on the maximum permitted throttle opening. When more than one protection function is active, the ETC uses the most restrictive limit.
This allows throttle intervention to be progressive rather than relying only on abrupt engine cuts.
Setup and Tuning
ETC is configured using the Spitronics Cosmos software, with graphical tuning, RealTime data, sensor calibration, and diagnostics.
Detailed installation, wiring, and setup information is available in the Electronic Throttle Control Manual and the separate Electronic Throttle Control Calibration Guide.
Software: Cosmos ETC
Overview
The Spitronics Callisto ECU is a versatile, standalone automotive controller designed as a cost-effective and durable solution for a wide range of engine, transmission and vehicle-control applications.
Developed in South Africa, Callisto combines practical features, flexible configuration and rugged hardware in a compact package. The system is designed to make installation and tuning straightforward for both novice and professional installers, while providing the functionality required for performance and custom automotive applications.
Callisto can be configured for a wide variety of applications, including:
- Performance and racing engines
- Engine and vehicle conversions
- Custom-built vehicles
- Replacement engine controllers
- Throttle-by-wire applications
- Automatic transmission control
- Advanced performance functions
The controller can interface directly with a wide range of engine sensors and actuators, including injectors, intelligent coils, solenoids and electronic throttle motors. Depending on the configuration, features include Lambda Control, Idle Control, Cam Control, Boost Control, Throttle-by-Wire, Launch Control, Stepper Motor Control, Fuel Pressure Control and Tiptronic Transmission Control.
Rugged and Reliable Hardware
Callisto uses modern high-speed microcontrollers and surface-mount technology, with machine-soldered components to ensure consistent manufacturing quality. The compact controller can be installed inside the vehicle’s passenger compartment and can also be supplied with an epoxy-filled enclosure for increased protection against moisture and harsh operating environments.
Controlled Firmware System
Callisto uses a controlled firmware system rather than allowing end-user firmware reprogramming. The ECU is supplied with firmware appropriate for the intended application, while certain critical settings are protected to help prevent incorrect configuration and simplify the setup process.
This approach provides greater control over the configuration and helps reduce support issues associated with incorrectly configured firmware.
Commercial and RacePack Options
Callisto is available in a Commercial class for general automotive applications, with an optional RacePack providing additional performance-oriented functions such as launch control, spinning and drifting features.
Qualified dealers can also stock Callisto units in an unactivated status and activate the required functionality when the ECU is supplied to the customer.
Cosmos Tuning Software
The Spitronics Cosmos tuning software provides a user-friendly interface for configuring and tuning the Callisto ECU. It gives installers access to the available engine, transmission and control functions while providing the tools required to configure the system for different applications.
With its flexible hardware platform, controlled firmware architecture and extensive control features, Callisto provides a practical standalone solution for everyday vehicles, conversions and performance applications.
Features
Callisto TxW Features
Callisto firmware for Throttle-by-Wire (TxW) is universal and can be configured for most throttle-by-wire systems. A setup manual is supplied, and the system must be calibrated on the vehicle during installation.
Refer to the selection chart for the capabilities of the different classes.
Sensors
- Pedal TPS sensor – Indicates the driver’s throttle request. The throttle opening is adjusted according to this signal.
• Throttle TPS sensor or tap-in signal – Indicates whether the throttle body is in the correct position.
• RPM signal – Used for idle control.
• Water temperature sensor or signal tap-in – Assists with cold start operation.
Outputs
- Four drivers are used in an H-bridge configuration (positive and negative) to control the throttle-by-wire motor.
• An output for a clutch solenoid ensures compatibility with different throttle-by-wire systems.
General Purpose Outputs
General-purpose outputs may be used for custom control features when required.
Standard Harness
A universal harness system reduces the need to keep multiple harness types in stock.
Level 2 harnesses include relays and fuses to simplify installation and reduce installation time.
All input harness wiring uses screened cables to reduce electromagnetic interference that could cause unstable TxW operation.
Additional interface boards may be used to support different wiring configurations.
Compact Electronics
The TxW unit is compact and can easily be mounted under the dashboard, requiring very little installation space.
Complete Firmware for Most Throttle-by-Wire Systems
Firmware is available to support a wide range of throttle-by-wire units.
Cost Effective
All necessary features are included, eliminating the need for expensive additional systems.
Standard Tuning Software
All Spitronics products use the same tuning software platform. Features that are not available in the firmware are automatically hidden to simplify the interface.
Easy DIY Instructions
Installation instructions are provided for users who wish to install the system themselves.
Start-Up Maps Included
Base maps are included to assist with initial setup and tuning.
User-Friendly Tuning Software
The tuning software is extensively explained in the manual.
Map Locking
Tuning maps can be locked to prevent tampering. This is useful for builders providing guarantees.
(This product is intended for users who understand wiring and operation of throttle-by-wire systems. If unsure, download the software, maps, manual, and drawings and experiment first. These are available free of charge.)
Specifications
Power Supply
12V Ignition power – 100 mA, filtered on board
12V Battery ignition power – 100 mA, filtered on board
12V Driver power – up to 14 A, depending on the load of connected devices
2.5 mm² earth strap for internal negative drivers
1.5 mm² battery earth for electronic components
Fixed Inputs
- 2 × Digital inputs for Magnetic, Hall, or Optical sensors (jumper selectable)
• 1 × Digital input for Dual Map, FlatShift, or RapidFire
• 4 × Analogue inputs (0–5 V) for MAP, TPS, POT, and Lambda
• 1 × Built-in 1.15 bar altitude sensor input (0–5 V) – optional, installed at purchase
• 1 × Water temperature input – 1k, 2k, and 2.5k NTC sensor selectable
• 1 × Air temperature input – 1k, 2k, 2.5k, and 10k NTC sensor selectable
• 1 × UART communication port for Spitronics USB cable interface
Fixed Outputs
- 12 × 20 A 400 V High-Voltage Negative Drivers for coils, injectors or GP outputs
(ground or floating output) - 6 × 6 A 36 V Positive Drivers for smart coils and GP outputs
(+12 V or floating output) - 2 × 9 A 100 V Negative Drivers for relay and RPM output
(ground or floating output)
Communication
Software UART connection via USB2 converter cable
Bootloader installed for firmware programming during production via USB cable
Physical Specifications
Size: 144 mm × 68 mm × 22 mm
Weight: 187 g (non-resin filled)
Connector type: Plastic Molex connectors
3–5 connectors depending on model: 12, 10, 8, 6, and 4 pin
* The unit can be resin-filled. Weight will increase depending on the resin used.
Product Comparison Chart
Callisto Selection Chart
| Callisto Hardware | Race Pack | Commercial | Notes |
|---|
| TUNING SOFTWARE |
| Hyperspace | X | X | |
| EeziTune | X | X | |
| INPUTS |
| Map Sensor | X | X | |
| TPS Sensor | X | X | |
| Water Temperature Sensor | X | X | |
| Air Temperature Sensor | X | X | |
| Lambda Sensor | X | X | |
| Altitude Sensor OnBoard | | | * |
| Altitude Sensor External | X | X | |
| Map used as Altitude Sensor | X | X | |
| POT Sensor | X | | |
| Fuel Pressure Sensor | X | X | |
| Digital Switch | X | X | |
| Crank TDC Sensor | X | X | |
| Cam Home Sensor | X | X | |
| Cam1 VVT Sensor | X | X | |
| Cam2 VVT Sensor | X | X | |
| OUTPUTS |
| HV Negative Drivers (>300V) | 12 | 12 | |
| MV Negative Drivers (up to 100V) | | | |
| LV Negative Drivers (up to 40V) | 2 | 2 | |
| LV Positive Drivers | 6 | 6 | |
| FEATURES |
| Full Sequential Spark | X | | @ |
| Wasted Spark | X | X | |
| Dual Distributor | X | X | |
| Distributor | X | X | |
| Basic Coil Drivers | 12 | 12 | % |
| Smart Coil Drivers | 6 | 6 | |
| Full Sequential Injection | X | | |
| Split Sequential Injection | X | X | |
| Injector Trimming | | 8 | % |
| Fuel Pressure Control | X | | |
| Dual Injectors Ratio Method | | | @ |
| Dual Injectors Graph Method | | | @ |
| Injection Angle Adjustments | X | X | ^ |
| CONTROL FUNCTIONS |
| Automatic Torque Control | X | | |
| Spinning Control | X | | |
| Launch Control | X | | |
| Launch Retard 0–30° Gear Triggers | X | | |
| Launch Retard to 0° | X | | |
| Launch Recover Delay | X | | |
| Anti-Lag Control | X | | |
| Dual Maps | X | | |
| RapidFire | X | | |
| Flat-Shift Control | X | | |
| POT Input | X | | |
| TuneBox Capable | X | | |
| ADDITIONAL OUTPUTS / FUNCTIONS |
| Open Loop Cam Control | X | X | |
| Intake Flap Control | X | | |
| GP Outputs | 6 | 6 | % |
| SOFTWARE & PACKS |
| Android Pack | X | X | & |
| CONTROL FEATURES |
| Lambda Control | X | X | # |
| Idle Control | X | X | $ |
| V-Tech / Intake Flap | X | X | |
| COMPENSATION TABLES |
| TPS Compensation Graph | X | X | |
| Water Temp Compensation | X | X | |
| Air Temp Compensation | X | X | |
| Lambda Control | X | X | % |
| Idle Control | X | X | |
| Altitude Compensation | X | X | |
| Fuel Pressure Control | X | X | |
Notes
- * Altitude via external or mapped input
- @ Feature limited/conditional
- % Driver or feature limitation applies
- ^ Adjustable within supported modes
- # Requires a Lambda sensor
- $ Idle hardware dependent
- & Optional software pack
Important:
- Callisto firmware is locked (no firmware class upgrades).
- Features are fixed per unit (Commercial vs Race Pack).
- Race Pack enables additional advanced functionality where indicated.
