Fuel Injection
Technical Resources
Holley EFI Manuals, Drawings, and Information |
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Holley EFI Wiring Manual
Holley EFI Wiring Manual |
Holley EFI Introduction
Holley EFI Introduction |
Holley EFI Pin Map Instructions
Holley EFI Pin Map Instructions |
Holley EFI Quick Start Guide
Holley EFI Quick Start Guide |
Holley EFI Base Calibrations
Holley EFI Base Calibrations |
Holley EFI HP & Dominator Differences
Holley EFI HP & Dominator Differences |
Holley EFI Injector Flow Data
Holley EFI Injector Flow Data |
Holley EFI Sensor Diagnostics & Statuses
Holley EFI Sensor Diagnostics & Statuses |
Holley EFI Updating Firmware Instructions
Holley EFI Updating Firmware |
Holley Boost Control Manual
Holley EFI Boost Control Instruction Manual |
Holley Boost Control Quick Start Guide
Holley EFI Boost Control Quick Start Guide |
Holley EFI Datalogger Instructions for V3 software
Holley EFI Datalogger Instructions for V3 software. Some information in this manual will not apply to V2 and earlier software versions. |
Traction Control - TC2 Manual
Traction Control - TC2 Manual |
HP and Dominator EFI Component Selection Chart
Step by Step Component Selection Chart for HP and Dominator EFI Products |
Gen III HEMI EFI Component Selection Chart
Gen III HEMI Specific Selection Chart for HP and Dominator EFI Products |
Holley EFI 16 Injector Setup
Holley EFI 16 Injector Setup (8 Cylinder Engines) Setup of 8 Injectors in 8:2 Amp Peak and Hold Mode |
Replacement Connector Guide
Single Pack Connector kits for all Holley EFI Main Harnesses |
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Holley EFI V4 Software |
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V4 Overview
DOWNLOAD AND READ THIS FIRST. Includes V4 updates and information |
2016 PRI Seminar Example
This is the example calibration that was used during the Holley EFI V4 Advanced Features seminar at PRI 2016. |
V4 Revision Log
Contains a list of updates to V4 software and firmware versions |
Previous Holley EFI V4 Software and Firmware
Contains all previous V4 software versions (Build 30 and 32) in a zipped file. Compatible firmware is included in the software installer. |
Holley V4 Software and Firmware
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. |
Holley EFI V5 Software |
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Holley EFI V5 Software Overview
Holley EFI V5 Software Overview |
Holley EFI V5 Revision Log
Contains a list of updates to V5 software and firmware versions |
Holley EFI V5 Build 171 Updates
Updates for V5 versions Build 100 through 171 |
Holley EFI V5 Build 140 Complete File Set
Holley EFI V5 Build 140 Complete File Set - Include Software/Firmware and all Digital Dash or Handheld Firmware. Current production firmware shipping pre-installed in HP or Dominator ECU's. |
Previous Holley EFI V5 Build 110
Contains previous V5 version (Build 110) compatible firmware is included in the software installer. |
Holley EFI V5 Build 171 Complete File Set
Holley EFI V5 Build 171 Complete File Set - Include Software/Firmware and all Digital Dash or Handheld Firmware. Updated Canned and Custom Ignition Types. |
Holley EFI V5 Handheld Contents
Handheld contents for Holley EFI V5 Firmware. |
Previous Software Versions/Updates |
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Holley EFI Firmware
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. |
Holley EFI Firmware Changes
Change log for pre-V2 firmware versions |
Holley EFI Touch Screen Update
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. |
Holley EFI ReloadPM Installer
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. |
Holley EFI Software
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. |
Holley EFI V3 |
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V3 Software Overview
DOWNLOAD AND READ THIS FIRST. Includes V3 updates and information. V3 is updates are not needed for most users. |
Holley V3 Software
Contains latest V3 software |
Holley V3 Firmware
Contains latest V3 firmware |
Holley EFI V2 Sofware |
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Holley EFI V2 Instructions
IMPORTANT DOWNLOAD - These contain new instructions for V2 Installation, Features, Boost Control, and Traction Control |
V2 Update Instructions
DOWNLOAD AND READ THIS FIRST- Follow these steps EXACTLY to update your Holley EFI system to the new V2 version. |
Holley V2 Software
Contains latest V2 software. |
Holley V2 Firmware
Contains latest V2 firmware. |
Holley V2 Firmware Changes
Contains a list of updates to V2 firmware versions. |
QFI |
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Quick Fuel ECU Dashboard Files
Quick Fuel ECU Dashboard Files version 1.4 |
Legacy EFI Software |
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Pro-Jection 4D/4Di Installation
Pro-Jection 4D and 2Di Installation Guide |
Commander 950 TBI Manual
Commander 950 TBI Hardware Installation Manual |
Pro-Jection 1D Manual
Pro-Jection 1D Installation Guide |
Fuel Injection Tech Info
Technical Information for Fuel Injection |
Fuel Injector Selection
Selecting A Fuel Injector |
Commander 950 Software
Commander 950 software. Requires windows 98 or older, not compatible with Windows Vista or Windows 7 |
Pro-Jection 4Di Tuning Software
Pro-Jection 4Di Tuning Software |
Commander 950 Tuning Manual
Commander 950 Tuning Manual |
Commander 950 Base Maps
Base Map downloads for the Holley Commander 950 |
FAQ's
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QuestionAre any of the systems (self tuning)?AnswerThe HP, Sniper, Avenger and Dominator systems have self tuning fuel strategy.
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QuestionDo you need a lap top to get the engine running?AnswerThe Terminator, Sniper and Avenger Systems include a hand held programmer. The HP and Dominator systems require a laptop. All of the system can be tuned from a PC with compatible software.
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QuestionCan I run a DBW (Drive by Wire ) Throttle body?AnswerThe Dominator has integrated drive by wire throttle body control. For GM, Ford Coyote and late model Hemi.
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QuestionCan I run a MSD type ignition with your EFI systems?AnswerYes capacitive discharge type ignition systems are compatible.
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QuestionWhy should I choose Holley over another manufacturer?AnswerThere are other quality manufactures in the market place . Holley EFI systems offer flexibility and modular upgradability that is not offered by other manufactures. Our systems are broad spectrum and are used on everything from stock engine street rods to 4000+ HP pro-mods. The base ECU used in a Terminator is the same ECU used in Arce and in NHRA pro stock. The level of customer support we offer is unmatched in the industry from the quality of our tech support, Dealer network and end user training classes. Holley will be there after the sale.
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QuestionWill your system control my factory transmission ABS brakes etc.?AnswerThe Dominator EFI has ability to run a GM 4L60E , 4L80E Ford AODE and 4R70W. HP and Dominator based ECU's can be programmed for TCC control on a 700r4 or 200r4.
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QuestionWill your EFI system plug into my factory wiring harness?AnswerUnfortunately no, All of our systems utilize a stand alone harness.
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QuestionAre your injection systems emissions legal?AnswerYou will need to check local and state emissions regulations. Unfortunately due to the user tune ability of the systems the C.A.R.B. will not issue them an EO# at this time.
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QuestionCan I run E-85 or Methanol?AnswerThe HP and Dominator systems can be programmed for any concentration of gasoline, Ethanol or Methanol. However you need to make sure that the fuel system including your fuel injectors are compatible.
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QuestionAre any of your systems sequential fire?AnswerThe HP and Dominator series of ECUs can be programmed for Sequential Fuel strategies. They will require a cam as well as a crank reference input.
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QuestionDo your systems offer boost control?AnswerThe HP and Dominator systems offer Turbo boost control.
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QuestionWhat type of injectors and how many can the system run?AnswerThe HP ECU can run up to 16, high or low impedance injectors. It can stage two sets on a 4 cylinder. The Dominator ECU can run up to 24 high or low impedance injectors. It can run three sets with one staged on a 6 or 8 cylinder. The Sniper EFI system will be offered in a 4 and 8 injector option.
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QuestionDoes your system offer Nitrous control?AnswerThe HP ECU's have integrated Wet or Dry , Progressive and fixed NOS control for 4 stages, Dominator ECU's can support 8 stages.
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QuestionCan I run water meth?AnswerBoth the HP and Dominator systems have integrated water meth capabilities.
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QuestionDoes your system have traction control?AnswerThe Holley HP and Dominator ecu based systems support traction control when used in conjunction with a Holley specific module offered by Davis traction control.
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QuestionThe instructions say I need to wire the main power and ground wire directly to the Battery. Is that really that important and can I hook it up someplace else like a distribution lug, starter solenoid or kill switch?AnswerYes it is very important. Connecting them directly to the battery is one of the most important steps of the installation. Failure to follow any installation instructions as minor as they may seem can result in performance issues including damage that will not be covered under warranty.
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QuestionWill your EFI work with a turbo or other form of forced induction?AnswerThe HP and Dominator ecu's are compatible with 1- 9.9 Bar applications. The systems also has integrated boost control. Sniper EFI has a 2 bar integrated map sensor.
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QuestionAre Terminator, Sniper, Avenger , HP and Dominator systems narrow or wide Band?AnswerThey are all wide band systems. The Dominator is dual channel capable.
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QuestionWill your system run DIS?AnswerThe HP has 8 channel outputs the Dominator has 10 channels . They are capable of driving "Smart" coils, Holley DIS coils or 2 wire high current "DUMB" coils with the addition of the 554-112 high current coil driver as well as Waste Spark applications.
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QuestionDo your systems support Transmission control?AnswerAll systems that include a Dominator based ECU can controll the following transmissions. ( GM = 4L60E, 4L65E, 4L80E ) ( Ford = 4R70W and AODE ).
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QuestionWill your EFI system work with my Oddfire engine?AnswerCurrently we do not have an EFI system that has the ability to do timing control with unevenly spaced firing orders (odd fire). However, if you have an ignition system that has an RPM output, you can use our EFI for fuel control.
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QuestionWhat type of injectors and how many can the system run?AnswerThe HP ECU can run up to 16 high or low impedance injectors. It can stage two sets on a 4 cylinder. The Dominator ECU can run up to 24 high or low impedance injectors It can run three sets with one staged on a 4 or 6 cylinder. The Sniper EFI system will be offered in a 4 and 8 injector option.
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QuestionWhere do I send my ECU to have it repaired?AnswerUnfortunately we cannot repair the ECU because it is Potted. Potting the ecu provides several benefits. The down side is that a potted ECU cannot be repaired if it is damaged due to improper installation. Always read the instruction and follow proper installation procedures to avoid ECU damage. If you damage the USB port by pulling the cable out of the connector on the back of the ECU we may be able to repair it. Contact a tech service representative for more information pertaining to a damaged USB port.