Holley’s Tech Videos Offers Help on Installing their EFI Systems

Holley released their newest EFI systems, dubbed the Avenger and Dominator, about a year ago now.  They have been making waves across the street and strip world for its ease of use and expandability options.  To help people interested in the system or troubleshoot common installation questions, Holley has released a slew of videos on HolleyTV.com that helps out.

Main harness overview

The product line starts at the Avenger, which is a bolt-on-and-go EFI system that will self tune with a variety of pre-determined questions through the hand held LCD display. The self-learning ECU will give you the option to do some global spark and fuel tuning for idle and wide open throttle while also displaying an array of data from the sensors. This is a great solution for a mild to moderate street car setup.

The HP EFI is the second level on the Holley EFI line. Similar to the Avenger with its self learning capability, the HP adds four programmable inputs and four programmable outputs that are ideal for most vehicles with a single power adder, as well as laptop programmable tuning. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous (up to four stages), water/methanol injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. Also this is a direct plug and play ECU for GM LSx applications. This is perfect for an aggressive street car or moderate racing application.

Wiring techniques

Connecting to power

Proper grounding

Finding 12 volt power

Avenger initial setup

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About the author

Mark Gearhart

In 1995 Mark started photographing drag races at his once local track, Bradenton Motorsports Park. He became hooked and shot virtually every series at the track until 2007 until he moved to California and began working as a writer for Power Automedia. He was the founding editor for its first online magazines, and transitioned into the role of editorial director role in 2014. Retiring from the company in 2016, Mark continues to expand his career as a car builder, automotive enthusiast, and freelance journalist to provide featured content and technical expertise.
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