EFI System Archives - Engine Builder Magazine
Holley Sniper 2 EFI

No complex EFI conversions here, Holley has announced their new Sniper 2 EFI! Get your vehicle up and running in as little as four wires – battery, switched ignition, and RPM. Sniper is an ecosystem and is designed to support the needs of your build The only thing easier than the installation is the setup.

EFI Timing Control & its Advantages

No one can overstate the fact that EFI timing control has radically changed the ability for anyone to fully, and correctly, optimize an ignition timing curve, assuming they are interested in investing the time.

Speed Density vs Alpha-N Tuning Strategies

Choosing the best strategy for your application will ensure that the correct fueling and spark event is applied to the engine.

EFI Sensors and Uses

EFI systems can employ numerous sensors to perform many tasks, including data acquisition, but this article will concentrate on only the required sensors.

Open Loop/Closed Loop and Learning

Closed-loop control can be programmed to either add or subtract up to a certain percentage of fuel in order for the engine to reach the target air/fuel ratio.

Reviewing Holley’s Terminator X EFI System

As part of our small block Ford build, we decided to use Holley’s Terminator X EFI system for plug and play Ford V8 engine control. Chris Wright of Pro Car Associates and Greg Jones of Engine Builder review all that the Terminator X offers and why Holley has been a leader in this product category.

Holley Dominator EFI Kits

Holley Dominator EFI kits are available for variety of popular applications, such as LS kits with and without drive-by-wire and transmission control and several universal kits for conventional pushrod Ford and Chevrolet engines. These Dominator EFI base kits provide nearly limitless room for growth and expandability. They feature options such as integrated electronic transmission control,

Holley EFI Kit
Holley EFI Coyote and Gen III Hemi Smart Coils

Holley EFI Smart Coils are a bolt-in ignition upgrade for your late-model Ford Coyote or Mopar Gen III Hemi engine. Compared to a stock coil, they produce more spark energy while consuming less power without sacrificing voltage output. This means you get a hotter spark at the plug to burn the maximum amount of fuel

Holley EFI
Holley EFI Lightweight Dominator ECU

Holley EFI’s new Lightweight Dominator ECU utilizes a lighter potting material than the standard Dominator unit, which reduces total weight by 1.8 pounds.  This lightweight version is specifically intended for drag racing. It is not recommended for use in high-heat conditions (under-hood mounting installations), and applications with high continuous current draw. Features: Lightweight ECU potting

Holley Dominator EFI
Holley EFI Terminator X Stealth 4500 2×4 Kits and Service Parts

The Terminator X ECU is designed to fit with Gen 3 Ultra Dominator air cleaners and fuel crossovers, allowing you to easily convert your 4500 equipped 800+ horsepower dragster or door car!

Holley EFI
The EFI Tuning Evolution

Much of the acceptance of EFI has been due to aftermarket companies making them more user-friendly.

Terminator X Stealth 4500 EFI System

The Terminator X Stealth 4500 EFI system can support up to 1,500 horsepower naturally aspirated or 1,250 horsepower on forced induction applications.