I believe in "simplify and add lightness". They always responded to my questions with guidance that helped me choose the right system for me. Any closer than that and you can get reversions of air that throw the sensor off. When buying the Holley Sniper EFI kit, you've got two basic options. A little less if you have a low-compression engine, a little more with a higher compression engine.Secondly, as soon as you complete your configuration I'd suggest modifying MAP axis on the fuel map. At that point, you will either have to install the Holley Dual Sync Distributor or, if you already have an MSD distributor, then simply install the MSD 84211 Rotor Phasing Kit and lock out the mechanical timing advance. It will answer all of your questions above and then give you more great ideas. Price Point: $$, EFI Systems based on Super short tight headers and straight pipes. Holley's new Sniper EFI master kit for C2 and C3 Corvettes is a specific fuel system economically priced so you can have all the benefits of EFI and still have money to finish or upgrade. Most recently, the choke was sticking and not allowing the fast-idle to come down and fuel mileage was not as good as I would like. Attach the throttle and kickdown cables to the EFI unit. The sniper packs so many devices into 1 small package, I am interested to know if it could be used in my setup. I have one customer who has been working on this for some time now and isn't having success. Dropping the fuel tank to install a return line is the hardest part of the install. But because you can change the settings using the Sniper Software, and since there is a 2-bar MAP sensor, in theory this is all doable.But the better question is not if the Sniper will work but should you use the Sniper. PDF 4150 Sniper EFI (550-510 Shiny, 550-511 Black, & 550-516 Gold) - Holley Henkka. The stock set up has provisions for the required throttle valve cable for the 700R4 transmission. Typically this is used in conjunction with an A/C system keep the engine speed from dipping as the compressor cycles on and off.The IAC Kick is triggered when the orange wire on the 10-wire connector (included with the Sniper) is grounded. With the fuel feed line attached, the stock air cleaner would not fit. By the time to replace all of that you could have simply installed a good EFI fuel pump.Our bias is certainly showing here, but we prefer the Holley In-Tank Returnless RetroFit Fuel Pump. But in practice, it's not so simple. Absolutely!Q3. So the O2 sensor is necessary to do that tuning.Once tuned, it is theoretically possible to disable the learning and the closed-loop operation, but I do not advise that. Sniper Kit-https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_4bbl_tbi_kits/sniper_4bbl_tbi_master_kits_with_fuel_system/parts/550. Holley says the Sniper EFI will work on a spreadbore intake, but I still used a spacer/adapter. If its full, use a jack to lower it. We are expecting our first pallet of these to ship from Holley today. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. Holley Sniper installation (with MORE pics) | Team Chevelle The current configuration dyno tuned at 301 hp to the ground at 6800 rpm. In addition can this be used with Holley 12-133? My recommendation is to run with the installation exactly as you plan. That includes removing the fuel tank and completely re-plumbing the fuel system. Holley Sniper EFI Hyperspark Ignition Install Kit,Coil/Box/Wiring While we are in Florida (which isn't known for it's mountain ranges) and I haven't yet received feedback on this, I think I can safely assure you that it will work just fine. Gas mileage terrible on new Sniper install. - Holley Performance Methanol? Provided that you aren't running any sort of capacitive discharge ignition box (like the MSD 6) then just connect the yellow wire from the Sniper 7-pin harness to the negative side of the coil. In the final analysis, however, I would not base your decision to go with the Sniper EFI on a few more horsepower. The O2 sensor and the Sniper EFI System's ability to learn are one of the key benefits to this system. Sure wish we could get more information about the Sniper EFI system. Kinking the fuel line will decrease the fuel volume flowing and decrease the lines life expectancy. My pump now is from a 90's TBI camaro. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. :-D. Hello Chris, I have a couple of questions on the Sniper EFI that I plan on purchasing this coming spring.First, when I remove my computer controlled Rochester carb, I will loose the trans lock up feature of the ECM. It doesnt require understanding how the Inlet Air Temperature (IAT) or Manifold Absolute Pressure (MAP) sensors work. Although Holley sends enough rubber fuel line to complete the install, I wanted to use steel lines where ever I could. But if you are the sort that might bolt this on and expect it to work with any hiccups then I'd say stick with your double-pumper.Second, the next iteration of the Sniper (the "Super Sniper") has some impressive boost control capabilities. And if you are going to do that for the additional 40-50 HP that you might gain, I would suggest you have a desire for the other many benefits of EFI, namely easier cold starts, avoiding vapor lock, better idling and response at lower RPM, less gasoline smell. Keep in mind that these first orders will go to those who pre-ordered and were patient enough to wait through all of those delays. But, if you are like the rest of us, just settle for a moderate gain as you enjoy your new toy. Around 14+ MPG. The Sniper provides for both the activation of and the EFI tuning for your nitrous system.For the activation, the Sniper provides an input to which you can wire an activation switch. mechanic skills, have a good head for troubleshooting, and aren't easily Also, if I choose to buy this system, I would get complete fuel tank also. Capability Range: Advanced But now, many manufacturers have jumped head-first into the realm of developing an EFI system that does not require a laptop or the aforementioned degree. Swing-out cams and a thick, neoprene . Sniper EFI gives you all the power and reliability of electronic fuel injection with none of the tuning issues commonly associated with carburetors. Rather than diving right into the questions, let me clarify something that might simplify things a bit: If you have a working ignition system and want to keep it, you can. In addition to giving you an easy, guided setup process, this jewel can digitally display various critical sensors after the system is running, or even datalog. 05-17-2023, 01:20 PM. Remove any plug or sensor from the temp sensor mounting location and install the temp sensor. Hang in there!Update, September 29, 2016: They are shipping TODAY. Lucky for me, the Sniper EFI doesnt require me to upload and adjust fuel maps or tables. PDF QUICKSTART MANUAL - Holley Remember, this is a self-learning system, let it do its thing. Holley's Sniper EFI For C2 and C3 Corvettes - MotorTrend The good news is that these just started shipping to dealers TODAY so you are definitely closer to seeing one of these than ever.I fully sympathize with the issues keeping the Pro-Jection unit working, though it really sounds like your experience in tuning EFI systems did pay off. Note: If your vehicle has a high volume/high pressure electric pump, you dont need to worry about this section except to disconnect it and connect the power wires to the new pump. But you'll have to find someone with more experience on how those smog pumps integrate to find out if that can be done. I know this is pretty much opposite to the normal intended usage of the Sniper but it will still give me the trouble-free usage, fuel economy and torque of an EFI system even if I'm not pumping out insane 400hp dyno pulls with it. Sniper EFI Update: Weeks Later, Do I Still Feel It Was Worth It? I have a gut feeling that I might be able to make this work. Like many others, EFI System Pro allowed me to dial a new Holley Sniper. 3. Will the Sniper EFI work for my 1966 AMC Rambler with a 287 V8? Holley says you should install the fuel line, pump and filters first, but I prefer to start by removing the carb so that you have some leeway with the fuel line. Also will I need to run the Holley dual sync distributor to control the timing through the controller or is an MSD ready to run dizzy ok? Not, yet, Oney. The setup wizard for the Sniper system is not advanced enough to support pressures over atmospheric. But you can't see these 3 pressures on the handheld or on the Holley EFI gauges. Here's where it gets tricky. You will typically like to run a richer AFR here to get the best performance, and not cause detonation. The higher the AFR, the leaner the mixture. Is this acceptable or should I run cable from battery directly to engine block. The Sniper EFI throttle body is a bolt-on replacement for a square-flange carburetor. I wanted to convert over to stock type fuel injection but cost and complexity have kept me from it. Don't forget to install a 10 Micron Fuel Filter between the tank and the Sniper and replace the worn out factory spring-type clamps with quality EFI hose clamps. But Holley says the Sniper EFI System power and ground are important and they are in a position to know. And because the ECU for the Sniper system is built right into the throttle body, the wiring requirements are reduced to almost nothing! multi-port EFI systems One discussion that seems to be reoccurring, is aboutupgradingto electronic fuel injection (EFI). Be sure to buy from someone who not only knows the system intimately but is committed to their customer's success. Finally, drop and drain the fuel tank. Route the black and red wires to the battery negative and positive terminals. I filled the tank and put a measly 50 miles on it and I'm getting around the same mileage I did with the QuadraJet carb. Your email address will not be published. All of the Sniper systems can be used on 4-, 6-, or 8-cylinder engines, provided that other criteria are met. I think that, using the basic I/O capabilities of the Sniper that allow you to activate an output signal based on the throttle position sensor you could implement a super-simple type of torque converter control. If you really want to try this and are willing to absorb the cost in the event it does not work to your satisfaction on your particular application, great! I think that the standard Sniper EFI System a good choice for you, Hunter. For that $250 you get an inline fuel pump, pre- and post-filters, fuel line with Earl's push-lock fittings, a fuel bulkhead fitting for the return line, as well as assorted clamps and mounting hardware. We all know what idle is, and when you shift into gear and drive at a low mph this islight cruise. If you are buying a tank GM that overlaps the years 64 anf 65 (such as the tank system for the 1962-65 Chevy II Nova) I would use an ohm meter and confirm if you have the early sender (0-30 Ohms) or the late sender (0-90 Ohms). However, by using the software (which is free and identical for all Sniper EFI Systems) a gifted tuner can build a great configuration file for your newly-boosted Inline 6, including timing and boost control. The master kit adds $250 to the price of the $999.95 Sniper EFI System (for a total of $1249.95.) However, in the case of the Terminator you can download and use the Holley laptop software and a professional tuner should be able to get this set up as a boosted application. In other words, the maximum horsepower that the 4-injector Sniper can support on E85 (if indeed the Sniper EFI System can support E85) would be closer to 430 HP instead of 600 HP. Be sure to install with a good pre-filter (20-40 micron is good) and a good post-filter (10 micron is preferred. Setting up the system only requires answering a few simple questions on the hand-held controller. :-)When you say "MSD", I'm understanding that you mean a MSD CD box, like an MSD-6. On the other hand, if you are happy with something close to the stock horsepower and want nice, smooth throttle response, the 400 CFM that this throttle body can provide might be a bit much. It might even require you to install an adjustable fuel pressure regulator in front of the Sniper and lower the fuel pressure to the unit. If can stay with my Base Sniper, what modifications will I need t make? In general, it needed a rebuild. The bike weight about 1300 lbs. 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I'm currently looking for a system to convert a 502ci Boss Hoss trike (v8 motorcycle) that currently sports an overly rich running quad on it. In the case of your MSD 6AL-2, it will simply receive the tach signal from the box. some autocross and some drags once in a while.Thanks. In most cases, 10% fuel savings is not out of the question. 1, Has anyone installed a Holly Sniper EFI on an 85 C4 corvette. The Sniper is designed specifically for a very narrow range of engines--fortunately, your 455 Olds sits squarely in that range.Ultimately, I do think that the Sniper would be an outstanding system for you. Strongly recommend. This guarantees a constant 12 volts to the system. I currently have a dated Holley TBI ( Projection 4 )on my GMC Classic Motor Home , the 455 Olds Tornado front wheel drive. Intro Holley Sniper EFI Total Cost and Thoughts Ramblin' Garage 2.58K subscribers Subscribe 633 71K views 2 years ago Discussing the total cost of installing a Holley Sniper EFI system on. Can you let me know when these are available? All numbers are with the engine at operating temperature. That is what we're looking for! I was wondering if the sniper efi would work with the Fitech fuel command center? If you have a ground wire from the fuel pump, strip it and terminate it and the black wire from the harness in a suitable ring terminal, also heat sealing it, and then connect it to the battery negative cable end. Most other features can be implemented using the touchscreen display.I always recommend initially installing the Sniper with your existing working ignition and then moving to timing control.
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