Features

Note that some features are only available in RacePack versions, depending on whether enough drivers are available for all required tasks. Refer to the selection chart for the capabilities of the different classes.

Fuel Delivery

• Accurate fuel delivery and injection timing improve performance and fuel consumption by maintaining consistent atomisation for each cylinder.
  • Injection methods available include Batch, Split Batch, Split Sequential, and Full Sequential.
  • Different tuning methods can be selected, such as graph, matrix, or a combination of both.
  • All graphs and matrix data are 2D or 3D interpolated to ensure smooth fuel calculation accuracy across the entire operating range.
  • Fuel calculation is based on MAP or TPS signals versus RPM, or a combination of the two. This accommodates engines ranging from street applications to racing, and from economy to high performance.
  • Additional sensors used to adjust the fuel mixture include water temperature, air temperature, altitude, lambda, battery voltage, and throttle response.
  • Fuel injection timing resolution is adjustable between 6° and 30°, depending on the crank trigger type.
  • The MAP sensor reading angle can be adjusted for multiple throttle body systems, with the same degree of resolution as above.
  • Dual injectors can be controlled using two methods:

• Staged injectors with Ratio adjustment
• Graph phased method
  • Injector trimming is available for up to 8 injectors when running full sequential injection.
  • Fuel enrichment can be applied during Launch, RapidFire, or retard functions.

Ignition Spark & Timing

• Callisto can manage distributor ignition, wasted spark coil packs, wasted spark COP coils, or full sequential ignition systems.
  • Standard automotive coil packs can be used. Smart coils or basic coils may be wired directly without modification.
  • External coil drivers such as the Orion 4-way or 6-way drivers can be stacked to support V12 systems or V8 dual-coil engines (which may have up to 16 coils).
  • High-performance internal drivers ensure a strong spark suitable for a wide range of fuel mixtures and include built-in overload protection.
  • Callisto provides very accurate ignition timing, especially when using gear-type trigger systems.
  • Ignition timing is calculated using MAP or TPS versus RPM, or a combination of both.
  • Additional sensors used to modify ignition timing include water temperature, air temperature, and altitude.
  • Battery voltage compensation adjusts coil charge time, particularly useful during cold starting or when alternator voltage is outside the normal range.

Sensors

• Callisto supports most standard automotive sensors without requiring modifications to distributors or additional converter boards.
  • Custom bolt-on trigger gears may be used for older engines running carburettors or engines with incorrect trigger setups.
  • Gear-type triggers provide more accurate and responsive timing, particularly during throttle blip conditions. This method is preferred for racing applications.
  • Sensors can be calibrated within the software to suit various sensor types.

Idle Control & Cold Start

Idle control assists with cold starting and maintains a stable idle speed when additional loads, such as air conditioning or automatic transmissions, draw power from the engine.

• On-board idle control supports one-wire and two-wire idle valves.
  • Spitronics stepper control units may be connected to control quad and bipolar stepper motors.

Launch Control

Launch control increases boost pressure during vehicle pull-off to eliminate turbo lag.
Activation methods include:

• Buttons
  • Clutch switches
  • POT position
  • Other programmable inputs

Launch Delay Recover

This function restores full engine power with an adjustable ramp delay, improving traction during launch conditions.

Dual Injectors

Callisto can control dual injectors when using specialised firmware. Fuel can be added using either:

• Ratio control
  • Graph control

Anti-Lag

Anti-Lag increases boost pressure during racing conditions to eliminate turbo lag in corners.

• An optional output can activate EGR valves to bypass turbo pressure to the exhaust.
  • This assists with engine braking in corners and helps maintain boost pressure for faster acceleration when exiting the corner.

RapidFire

RapidFire creates a machine-gun-style exhaust sound commonly used in drifting applications.

• Frequency is adjustable
  • Flame intensity at the exhaust outlet can be adjusted

Variable Rev and Launch Limiters

These limiters allow real-time adjustment of RPM limits during operation.

Flat-Shift

Flat-shift temporarily cuts engine power during wide-open throttle gear changes, assisting with manual gear shifting.

Dual Maps

The ECU can store two different fuel and performance maps, useful for weekend racing or switching between performance modes.

Map Change On The Fly

Drivers can switch between maps while driving.

General Purpose Outputs

Up to six GP drivers can be used if available. These can control devices such as:

• Injectors
  • Cooling fans
  • Shift lights
  • Air-conditioning cut-out during pull-off or uphill conditions

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 save time.

All input harness wiring uses screened cables to reduce electromagnetic interference that could cause unstable ECU behaviour.

Compact Electronics

The ECU is compact and can easily be installed under the dashboard with minimal space requirements.

Complete Firmware for Most Engines

Callisto firmware supports a wide range of engine configurations.

Cost Effective

All essential features are included, removing the need for expensive additional systems.

Rotary Systems

Callisto supports:

• 2-rotor and 3-rotor rotary engines
  • 4-rotor and 6-rotor configurations when required

Dynamic Injection Angle

For rotary engines, the injection angle can be dynamically adjusted with RPM.

• Two 360° graphs are available
  • Separate control for primary and secondary injectors

External MAP Sensor

External MAP sensors reduce vacuum signal delay and increase system flexibility.

• Sensors from 1.1 bar to 7 bar are supported
  • Calibration includes an offset value, allowing OEM MAP sensors to be used

Altitude Compensation

An optional built-in altitude sensor can be installed during purchase.

This compensates for altitude changes in TPS-based systems and can also be used in graph mode for normally aspirated engines.

Critical Settings Warning

Critical configuration settings that could affect wiring are protected with warnings to prevent accidental changes by the tuner.

Standard Tuning Software

All Spitronics products use the same tuning software platform. Features not available in the loaded 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 allow easy engine start-up and initial tuning, typically using a lambda sensor.

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 engine builders, providing guarantees.

No Dyno Required

Vehicles can be tuned using the built-in data logger and wideband AFR tuning tools, following the instructions in the manual.

(The last five points are intended for users who understand engine wiring and operation. If unsure, download the software, maps, manual and drawings and experiment first. These are available free of charge.)