Holley 550-858K Sniper EFI BBD Carburetor Master Kit in Chrome for 71-86 CJ Jeep Vehicles with 258c.i. 6cyl
CARB Notice
- Legal in California, or other states adopting California emissions standards, only for racing vehicles that may never be used, registered or licensed for use, upon a highway. Can not be shipped to California residents.
Precision Fitment: Engineered specifically for 1971-1986 Jeep CJ’s with 258ci 6 Cylinder Engines. Bolt on BBD Carburetor Replacement (in Chrome) makes installation smooth and accurate. There are Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM).
Power Rating: This unit will Supports up to 350HP with Two 100lb/hr Injectors.
Cohesive Components: Throttle body mounted ECU means no extra boxes to mount and an Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI).
EFI Tuning: Self tuning unit with simple calibration by answering a few questions about your engine which will create a base map, then will start tuning on it's own. Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
Included Kits: Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange. This Sniper EFI BBD Master Kit also includes 20" of fuel hose, two filters, one high pressure EFI fuel pump, and all of the required fittings for a complete EFI fuel system conversion!
- Engine Size: 4.2L 258ci I-6
- Engine Fuel: Gasoline
- Shipping Weight: 19lb
- Shipping Dimensions: 27in x 15in x 10in (L x W x H)
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Jeep CJ-7
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Questions
Fuel-Only Control (Simplest Setup): You can keep your points distributor to trigger the spark directly. The Sniper system simply needs an RPM input ( tach signal ) so it knows when to inject fuel. You can connect the EFI's tach input to the negative side of the coil or use a compatible ignition setup.
Full Timing Control: If you want the Sniper ECU to manage your ignition timing as well, a mechanical points distributor will not work for that purpose because it cannot let the computer dynamically alter the advance. To let the Sniper control timing on a Jeep 258ci engine, you would need to upgrade to a computer-compatible electronic distributor (such as a Holley HyperSpark or a DUI/HEI style setup).
If you plan to run it with your existing points setup just for fuel injection, ensure your wiring follows Holley's instructions for a basic RPM input.
