HP EFI Systems

When comparing fuel injection systems, there are three primary considerations: Capability, Complexity, and Cost. First, can it do everything you need it to do? Second, can you figure out how to use it? Third (and maybe most importantly), can you afford it? The Holley HP Fuel Injection Systems are designed to hit the center of this difficult target, giving incredible capability, simplified operation, and low cost in one fuel injection system. No other fuel injection system on the market today can claim to do so much for so little.

Let's take a look at some of the basic features:

• Works with 4-, 6-, or 8-cylinder engines

• Control Fuel and Ignition to the individual cylinder level

• Plug-and-Play options for several EFI engines, with more being developed

• Internal data logging (up to 2 GB)

• 4-Stage Progressive Nitrous Control

• Turbo Boost Control

• Water-Methanol Injection Control

And, like all Holley Fuel Injection System ECU's, the HP features a self-tuning fuel table, which makes a trip to the dyno either completely optional for many users and greatly simplifies the task for the rest. A complete list of all Holley HP Fuel Injection Kits is listed at the bottom of this page, but they break down into the following groups. TBI, Multi-Point, and Stealth Ram kits that only require the installer to select the right fuel injectors and fuel pump and are otherwise complete. The TBI kits allow you to replace an existing carburetor on just about any application, while the Multi-Point and Steath Ram kits are application specific. Retrofit kits allow you to install Holley HP Fuel Injection on any V8 application. ECU/Harness Kits give you the basics for building your own Holley HP Fuel Injection System on various applications, or just buy the Holley HP EFI ECU to build your own custom fuel injection system.

The Holley HP Engine Management System features 4 programmable inputs and 4 programmable outputs. These are used to implement some of the advanced features, like nitrous control, turbo boost control, water-methanol injection, or can be user-programmed for just about any type of sensor input or control output desired. While they are nearly unlimited in their capability, they are limited in quantity. If you plan to control a broad range of features, such as incorporating multi-stage progressive nitrous control along with turbo boost control and possible other I/O-supported requirements, be sure that the HP has adequate inputs for your needs. If you have any question, please contact us and we will be happy to assist in this area. For very advanced users it may be necessary to go with the Dominator Fuel Injection System, which offers ten times the number of inputs and outputs, virtually guaranteeing any level of I/O control.

Other noteworthy features:

Controller-Area Network (CAN) Bus: The Holley HP Fuel Injection System is compatible with the CAN bus standards, meaning you can incorporate CAN-compliant devices into your system. One way this can benefit the user is that, while the HP system is designed with a single wide-band oxygen sensor port, the user can add more via the CAN bus. This same bus is used to communicate directly with the optional 5.7" LCD Touch Screen Controller. (Connecting some devices, such as additional wideband sensors, to the CAN bus requires a CAN bus driver.)

Eight-Channel Injector Driver: The HP ECU features eight sequentially-driven 8:2 peak-and-hold injector drivers. These drivers allow you to use up to 16 low or high impedance injectors. Several different staged injector strategies are built right into the firmware.

Eight-Channel Distributorless Ignition (DIS): These can drive "smart" ignition coils, Holley 4-Wire coils, or 2-wire coils (with the addition of a 2-wire coil driver.)