HP EFI

DOWNLOAD AND READ THIS FIRST. Includes V4 updates and information

This is the example calibration that was used during the Holley EFI V4 Advanced Features seminar at PRI 2016.

Contains a list of updates to V4 software and firmware versions

Contains all previous V4 software versions (Build 30 and 32) in a zipped file. Compatible firmware is included in the software installer.

Contains latest V4 software (software version 4.0 Build 110). The compatible firmware (firmware version 4.0 Build 110) is included in the software installation. Changes include updates to run Holley EFI Coyote VVT Module, Drive-By-Wire updates, and other items. For specifics, the V4 Revision log.

DOWNLOAD AND READ THIS FIRST. Includes V3 updates and information. V3 is updates are not needed for most users.

Contains latest V3 software

Contains latest V3 firmware

IMPORTANT DOWNLOAD - These contain new instructions for V2 Installation, Features, Boost Control, and Traction Control

DOWNLOAD AND READ THIS FIRST- Follow these steps EXACTLY to update your Holley EFI system to the new V2 version.

Contains latest V2 software.

Contains latest V2 firmware.

Contains a list of updates to V2 firmware versions.

FINAL PRE-V2 FIRMWARE - Firmware must be installed with tuning software version 1.1.5 Build 3 located above. Read the "note" in the Holley EFI Firmware Changes document before performing firmware update.

Change log for pre-V2 firmware versions

It is recommended that all Touch Screen users that purchased a Holley EFI touch screen before June 2011, and experience a battery drain over 2-3 weeks, install this update. Download these instructions.

It is recommended that all Touch Screen users that purchased a Holley EFI touch screen before June 2011, and experience a battery drain over 2-3 weeks, install this update. See "Touch Screen Update" instructions.

V1.5.0.3. This is the last version of software before the V2 update. Do not update if your current software is 1.3. Contact Holley tech at 270-781-9741 if you have version 1.3.