The only issue was getting the info to hook it up to the Ls based 6LS msd box. ), Hi i have a chev 383 stroker engine with a 550-510 sniper efi , it is running well with no problems at all, now i want to fit a supercharger, weiand 144. Since you have a single-plane manifold (as you mentioned separately) that will be no problem. If this is something you plan to own and grow over time? I turned the idle screw out, and that seemed to help a bit, but the idle stayed high. A properly functioning engine with no underlying mechanical or installation issues is critical for proper operation. Bolt-on carburetor style EFI for your classic car or truck. Sniper EFI SD Card Updater - for 3.5" Touchscreen. This complete kit was very easy to install and tune. And as the system learns you'll find that only gets better. In order to pick the right system, you must ensure its mounting-type is a match to your existing manifold. An ignition coil driver (Holley Internal PN 271R1165A, PN 556-150) is included in the Sniper kit and is required to run the Sniper with timing control if no MSD ignition box is used. But this should get you moving forward. Sniper EFI has a 2 bar integrated map sensor. Start by back-probing the connector on the Sniper (while cranking) and then continue forward to the connector on the MSD 6 box if nothing is found there. After the 20 min drive I waited about 10 mins to restart with NO problems with the idle on the hot start - then the next day from a cold start I drove for 40 mins and waited about 30 mins to restart -NO problems again with the idle on hot start ! Make sure the switched 12V stays powered during crank if not, it is likely wired to accessory, and not crank/ run. This is an excellent feature because you can plumb with -6 AN hose ends or we have adapters for nearly any sort of connector you might want to use. The install video was much more helpful to me than the written instructions. Let me know where I can be of assistance! This will be awesome! Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4, Fits most stock Rochester Quadrajet (Q-Jet) air cleaners, Brake Booster adapter included, if required, Universal Throttle and transmission kickdown bracket included. WebDid you know that Sniper EFI is certified to United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Download these instructions. Instead, it provides you with a new set of tools for doing what technicians have been doing for 100 years. If I go into a restaurant or such and try to start 45-60 minutes later, it starts right up then it wants to shut down. I have installed the sniper system on a 302 in a 64 ford f-100 with a c-4 automatic one of the issues I have is the system will not hold closed loop, and it will also learn up to about 22% and then it will start unlearning where it goes to a - deg learn % also it has an issue of starting off the start up screen, but if you go to any one of the gauge screens it will start and run? Sniper EFI 4BBL Master Kits with Fuel System, Holley EFI CAN to USB Dongle - Communication Cable, Earl's -6 AN Male to 9/16"-18 (AN6) O-ring Port, Sniper EFI to Holley EFI Dual Sync Distributor Adapter Harness, Hooker BlackHeart Oxygen Sensor O2 Bung 3.0" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.25" Clamp-On Style, Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended), Throttle body mounted ECU no extra boxes to mount. Will the Sniper work with a 200-4R or 700R4 automatic transmission? Follow the quick-guide installation instructions. By Jack P on February 21, 2018 | Verified Owner. You should have at least 18-24 of exhaust after the sensor. this is my first post after reading a lot in this forum in the past 2 years. The Sniper EFI system looks at the closed-loop fuel compensation required to reach your target AFR. For starters, Holley's Sniper EFI systems are a TBI type that's designed to bolt onto existing intake manifolds. Bee Jay. The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn! I suppose the "V8 only" should not be surprising. I figured we would start our review with the Quickstart Manual and then go into details later in the full Installation Manual. Does this kit include wiring for the electric fuel pump including relays? Let me say the Sniper was similar in install for wiring and such so follow instruction with routing wires. If you damage the USB port by pulling the cable out of the connector on the back of the ECU we may be able to repair it. 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Holleys Sniper EFI systems bring fuel injection to the masses with carburetor-replacement systems that are designed to have all the benefits of electronic fuel injection without breaking your bank. When selecting a pump, and lines, be sure each component is designed to perform at high pressure. It uses feedback from the Wideband O2 to read the AFR (air/fuel ratio). - NO laptop required! Something as simple as weather, temperature, and elevation changes can dictate how much fuel an engine needs. If you disconnect the low power wire to the starter solenoid you can have someone hold the key in the START position and then probe your fuses until you find those that are powered. I am also that guy that read reviews to see if it is worth but never seem to write one, but I have to make sure people know that this is one great product and that Holley stands behind it a 1000%. Advanced Features of the Holley Sniper EFI This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. The Dominator is dual channel capable. Check it out. By Brandon S on February 16, 2018 | Verified Owner. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions! You would want a system that provides transmission control. View Parts. Designed to deliver the signature Rochester Roar at Wide Open Throttle! I installed my Sniper EFI, but how do I use my kick down for my C4 transmission? Holleys Super Sniper Stealth can support 1,250 horsepower and 21.5psi of boost so we teamed up with ProCharger superchargers to put one to the test on Westech Performances engine dyno. Yes, the sniper has a timed spark vacuum port that will operate the vacuum advance. The most basic installation only requires a tach input to operate. Bolt on carburetor replacement (designed to fit single & dual carb manifolds) Install was straightforward. Pay the couple hundred more bucks and buy a product that works out of the box with out spending hours to days tuning. Is the stock GM Powerglide transmission compatible with this set up? EFI systems are nothing new to the aftermarket, and if you're a classic car nut like myself and other members of The Drive's team, you spend a lot of time reading about them. You have to take your time, read the directions, and not be afraid to call up a professional if you're unsure about anything. Can someone give me a quick explanation of what the coil driver is used for? Some kits might even come with ignition and fuel system components. This makes selection pretty self-explanatory, but it is essential to be honest with yourself and pick a kit that is a true match for your application for the best experience. Why does my sniper (even when hot) idle up above the set of 900 rpm for at least 3 seconds and then idle back down to the set idle rpm? Includes complete fuel system consisting of; 20ft of 3/8 Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank! When I tightened the fitting, it got worse and I had a dripping leak. Supports up to 500hp with Four 100 Lb/Hr Injectors! High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays. You do not use, or need, the Sniper COIL DRIVER if using an MSD ignition box. Fuel injection can be daunting after a life of tuning carburetors, but Sniper EFI is arguably one of the simplest to install systems available on the market. Advanced Features of the Holley Sniper EFI Unit - RacingJunk do you have the complete set up for this procedure? BTW, can I get another stylus please. The instructions don't say anything about the PCV source, but I assumed this location was ok. Am I wrong? This is generally provided by the negative side of your ignition coil. By Spencer R on June 5, 2021 | Verified Owner. I'm not quite sure I follow the issue with the start-up screen, If it seems to be dysfunctional, get with the vendor where you bought the Sniper unit and see if a warranty clam is appropriate. Okay, I kind of have to chuckle at this one. Today, 11:57 AM Hi. And can the coil driver be setup for non ECU timing control? 50% learn doesn't mean that you're half way there. Coil, magnetic, cdi?Looking for some clarity on this issue.Thanks,Ian W. You can solve that with a voltmeter. More bad news, the sniper's air cleaner flange is 1" higher than the 4Di, so my Corvette hood With rpm air gap manifold will not close. Fuel Pressure Regulator: The majority of Sniper EFI systems come with a pre-installed fuel pressure regulator that will work great for all naturally aspirated, nitrous and roots supercharged applications. As long as you just added the pink wire from the Sniper to that circuit it should be fine. The chronicle of car culture, delivered to your inbox. You've got questions. Best Aftermarket EFI Systems (Review & Buying Guide) in 2023 The coil driver is used, I guess, in place of the ignition box. Traction control does take an add-on box, but it is far less expensive than the complete Davis Traction Control system because it uses the brains of the Terminator.I've only touched on the features that are basically "standard" with the Terminator LS but either require a new tune on the stock ECU or are completely impossible. Yes. After I sent it back the 2nd time they ran test and said that they were just going to send me a new replacement, WAIT WHAT! Contains the files needed to update the Holley touchscreen applications for use with V4 update. Will your system control my factory transmission ABS brakes etc.? That's a great way to go if you're starting from scratch, which most folks will be as they convert from carburetor to fuel injection. After all, the Terminator has the same limitation (assuming you want to use the Startup Wizard functionality.) Then upgrade to timing control once you have the EFI installation completed. This product would be a better direct bolt-on choice for your intake manifold. I want to remove my MSD box from the equation and use the distributor as a trigger. It can run three sets with one staged on a 6 or 8 cylinder. Choose one of these methods initially. Sniper EFI Releases new Stealth 4150 Models! Sorry, another question from an individual who did not purchase their system found your website post purchase unfortunately. ( GM = 4L60E, 4L65E, 4L80E ) ( Ford = 4R70W and AODE ). Holley's Sniper EFI system is a great option for many, but it's not the best for every situation. It will also have a pink wire that will need to go to the ignition switched 12V+ that is powered during run and crank. Excellent clarification, Bob--I've updated my post above based on your note! Will your EFI system work with my Oddfire engine? 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