The Holley Sniper EFI 2 system is a throttle body injection system designed for “bolt on and go” performance, manufactured in Bowling Green, Kentucky. The system incorporates a Power Distribution Module (PDM) to simplify installation and provide diagnostic capabilities. This article details installation considerations, power distribution features, and compatibility information based on available documentation. The documentation specifies compatibility with a range of Chevrolet, Ford, and Chrysler engines, as well as certain marine applications.
System Overview and Compatibility
The Holley Sniper EFI 2 system is presented as a complete throttle body injection solution. The provided documentation highlights its pre-testing to ensure functionality upon installation. The system is designed to provide power, ground, and switched connections for various vehicle components, including the throttle body, fuel pump, ignition module, and optional fan.
Engine compatibility, as listed in the documentation, includes:
- Chevrolet Small Block: 327, 350, 355, 383, 396, 400, 427 (Builders Series) PS454 (builders series)
- Chevrolet Big Block: BP454, 496, 502, 540 – N/A, 572 – N/A, 598 (Builders Series), 632
- Ford Small Block: 302, 347, 408, 427 (builders series)
- Chrysler Small Block: BPC4082CTC – N/A, BPC4085CTC – N/A
- Marine: 355 – N/A, 383 - N/A, 540 - N/A, 632 - N/A
Note that some engine listings are followed by “– N/A”, the meaning of which is not clarified in the provided documentation.
Power Distribution Module (PDM) Installation
The Sniper Power Distribution Module (PDM) is a central component of the system, designed to streamline the wiring process. The PDM’s compact and sealed design allows for mounting under the hood, but it should be positioned away from direct heat sources like the exhaust system. Mounting hardware is included for secure installation.
The PDM lid features a diagram detailing all power, input, and output locations, along with LED functions for diagnostic purposes. The LEDs on the PDM provide alerts if a short circuit is detected.
Electrical Connections
Proper electrical connection is crucial for system operation. The documentation provides specific instructions for connecting various components to the PDM:
- Battery: The Battery (+) and Battery (-) wires should be connected to the heavy-duty wire lugs on the PDM. It is explicitly stated to disconnect the Battery Negative (-) terminal first and attach it last.
- Keyed Ignition: The keyed ignition wire should be installed on terminal 16.
- CDI Ignition: Connections for CDI ignition systems include Main Power (+), Main Ground (-), Switched 12V, and Points, all connected to their corresponding locations on the PDM.
- Fuel Pump and Fan: Installation drawings (referenced on pages 2 and 3 of one document, but not provided) detail the typical installation of the Sniper 2 system with a fuel pump and fan.
PDM Electrical Characteristics
The Sniper PDM exhibits a low current draw, consuming 100 mA or less when connected to the battery. Due to this low draw, the documentation recommends using a trickle charger if the vehicle is expected to sit unused for extended periods. This is to prevent battery discharge.
Installation Considerations
The documentation emphasizes a straightforward installation process, aiming for “bolt on and go” performance. However, careful attention to electrical connections and proper PDM mounting are essential. The documentation notes the importance of reviewing installation drawings for typical setups involving fuel pumps and fans. The PDM is designed to simplify connections for the throttle body, fuel pump, ignition module, and fan.
Diagnostic Features
The PDM incorporates diagnostic LEDs that alert the user to short circuits. This feature aids in troubleshooting electrical issues during and after installation. The PDM lid diagram provides information on interpreting the LED functions.
Conclusion
The Holley Sniper EFI 2 system, coupled with the Power Distribution Module, offers a simplified approach to throttle body injection system installation. The PDM streamlines wiring, provides diagnostic capabilities, and features a low current draw, making it suitable for vehicles that may experience periods of inactivity. Compatibility extends to a variety of Chevrolet, Ford, Chrysler, and marine engines, though some listings include “– N/A” which requires further clarification. Proper installation, following the provided instructions and diagrams, is key to achieving optimal performance.
Sources
- Holley Sniper EFI 2 Installation and Tuning Instructions
- Holley Sniper EFI 550-510 Quick Start Manual
- Holley Sniper 2 EFI Manual
The provided source material is insufficient to produce a 2000-word article. Below is a factual summary based on available data.