This guide provides details on setting up a COMPUSHIFT Sport or COMPUSHIFT Pro with a Holley EFI using the CAN / RacePak protocol. These two systems are connected together using CAN bus, and signals like throttle position and engine speed are automatically transferred between the two units. No other connection is required.

Setup Instructions

  1. Ensure that both units are powered by the same switched ignition power

  2. Connect the CAN bus between the COMPUSHIFT controller and Holley EFI.

  3. On the COMPUSHIFT Setup app or handheld display, navigate to the “Vehicle Setup Menu”.

  4. Ensure that the transmission type is set correctly.

  5. Set the engine type on the COMPUSHIFT controller to “Holley RacePak CAN”.

  6. Set the Holley EFI to broadcast the RacePak protocol as shown in the video below.

  7. Navigate to the dashboard on the setup app or handheld display.

  8. Start the engine. Confirm that the engine speed and throttle position are reading correctly on the display.

You can diagnose CAN bus problems by going to Diagnostics / Network Diagnostics on the CS Setup App.
CAN 1 Receive Count should be steadily increasing when the ECU’s are communicating correctly.
The error counts should always be 0.


Holley EFI – Setting CAN to RacePak