Add To Cart. 2.5 out of 5 stars. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Capability Range: Professional adventure--the Sniper will support whateveryour hot rod goals may be in the future. The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. Modules and Sensors. Is the spark occurring at roughly the advance we expect it to be to promote ignition? Alternatively, you may want to consider completely unplugging the power harness or disconnecting the switched power so that the ECU is not powered and wont deliver a fuel prime at all. Add To Cart. Capability Range: Advanced EFI Systems based on Holley's world-class Dominator and HP ECU's. My solution was to significantly reduce both the Coolant Temperature Enrichment and A/F Ratio Offset corrections. Spark Plugs. I learned of this site while searching for answers related to issues i was having with my setup. *Possible delays due to Covid-19 click for more information. WebSniper EFI; Terminator X; HP EFI; Dominator EFI; Also in EFI - Fuel Injection. Harnesses. Inspired by the past, designed for the future, the Rocket Racing Wheels line of retro five-spoke alloy wheels provide the perfect look for classics, hot rods, muscle cars, and trucks. We can custom spec a turbo for your application. Further, your idle speed screw should be set so that your IAC only needs to be open a couple of degrees to maintain the target idle when the engine is fully warm and experiencing no load from transmission or accessories. Sniper BBD EFI System, Engines with unavoidable requirement for Rochester 2GC Carburetor 6 Fuel "Surge" Tank to allow fuel to WebEFI Fuel Tank SystemsA EFI Fuel Tank System includes the tank, high-pressure EFI fuel pump, level sender. Capability Range: Advanced There exists an engine speed above which the ECU assumes the engine is running as opposed to cranking. Its economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Sniper Owners: Once youve tuned your fuel prime on warm starts you can look forward to judging the efficacy of your fuel prime setting on your next cold engine start. Sniper is a one stop shop for a complete fuel system overhaul, including fabricated intake manifolds, high-performance plumbing parts, fuel pumps & regulators, and a self-tuning TBI-style fuel injection system that starts at $999! I have and will continue to recommend EFI System Pro due to your outstanding services and customer support. Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? Will going further help more? And with each pulse of fuel until the pump starts again at the crank-to-run RPM, the pressure drops further. While many wheel companies offer a "one size fits some" approach to stock wheels or offer made-to-order wheels that take weeks and even months to deliver, the Rocket Racing approach is different allowing us to offer wider ranges of fitments while offering savings in time and money to our customers. Put an end to cold start issues, hesitations, vapor lock, and flooding. Capability Range: Professional You can use the in-tank setup, the surge gas tank, or the in-line pump. WebLS1, -6 AN, EFI Fuel System Type, Fuel Filter Included. I did not buy my holley sniper from EFI Pro Systems. Terminator X Stealth Universal 4BBL TBI Systems, Actual fuel pressure matches what is specified in the configuration, Fresh spark plugs of the manufacturers specification are installed, Engine is timed and tuned for correct performance. The Best Place to Buy Fuel Injection Kits and Components! In fact, they may be terrible values when applied to your engine. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. While I unfortunately did not buy the Holley Sniper from EFI System Pro directly given my shop did so elsewhere prior to the install, I was still able to learn and benefit from EFI System Pro's adjustable progressive link, fuel gauge and a gasket setup. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) So now youre left with tuning the Fuel Prime Multiplier. Once you've done that then you can see if you don't benefit from going a bit higher or lower. We are committed to producing wheels with the highest quality standards that enhance the appearance and compliment the performance of your street machine. Holley's End Of Summer Warehouse Clearance Is On! This is a value that you dont have to nail the first time you try it. You see that the AFR trace is ar below the target AFR (pink trace.) (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). EFI Distributors. Super Sniper Stealth 4150 EFI System, Engines making up to 800 HP (Naturally Aspriated) Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. And that from a not-so-shabby original 1.13-second start time. To get anything close to that 7 PPH of fuel when your fuel pressure is dropped to half of its normal level you're going to need to tell the ECU to calculate a much bigger number. WebHyperSpark Ignition for Sniper EFI. Air is not just coming into the engine via the throttle blades. Fuel must also be added to start the engine. $ Sale $ Save $ 310.02. high-end carburetor! WebThe Sniper EFI 2GC Small Bore is a bolt on electronic fuel injection system that will put the fun back in your classic ride. Everyone else was backordered several months. Stay up to date with the latest releases, events, promotions and more. Hilborn EFI Systems. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Bolt-on carburetor style EFI for your classic car or truck. A couple of questions to ask yourself: Remove the air cleaner and have someone key the system on while you look down the throttle bores. Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. Engines making up to 1375 HP (Boosted or Dry Nitrous) efficiency. With Sniper, you can count on high-quality performance without the high-quality price! Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. View All. More on that later. THAT'S A PROBLEM!The Holley install manual CLEARLY STATES to make sure whatever switched 12 volt source you connect the PINK WIRE to, that it MAINTAINS VOLTAGE WHILE CRANKING THE CAR!! Gauges and Displays. You can adjust your Fuel Prime Percent as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Percent, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Percent (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). Engines require three things to run. Now were getting there. Microsoft is quietly building a mobile Xbox store that will rely on Activision and King games. Part Number: SNE-550-869K. You might consider opting for the Holley OE-style Tank Module instead of the complete EFI Fuel Tank System if your existing tank is in good shape. Like many others, EFI System Pro allowed me to dial a new Holley Sniper. Fuel Tank, Steel, Silver Powdercoated, Under Bed, EFI Swap, 255 lph, 18 Gallons, Chevy, GMC Kit. The included 2.5-inch Learn More. Not perfect but not bad. WebEFI Fuel System Components. RPM & Timing Controls. With 255 LPH models able to flow 500+ horsepower there is a fuel pump solution for every application. The Rochester 2GC small bore carburetor was commonly used on 1955 - 1969 Chevrolet and Buick, Oldsmobile, and Pontiac vehicles such as the Camaro, Electra, Super 88, Tempest and most C-10 through K3500 series trucks. I have and will continue to recommend EFI System Pro due to your outstanding services and customer support. He's not only answered the questions you have, he's answered some you don't even know you have yet. Sniper Stealth 4500 EFI System, Engines with unavoidable requirement for Quadrajet-style throttle bodies Nitrous maximums are generally limited based on fuel injector capacity. Stay up to date with the latest releases, events, promotions and more. $446.95. Recognize that the exercise above tuned our variables that are not affected by temperature (like fuel prime) and the temperature-dependent variablesbut only in the warm range. If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. Plumbing a Surge Tank with Mechanical Fuel Injection. The after-start enrichment will also fall off when the engine is started warm, but in most cases will not go away completely. Magnetos. We can adjust that with the after-Start enrichmentIll bump that up a bit. However, each engine is different. Get this high enough that it is not limiting the ability of the engine to start, tune the other factors that enhance the engines ability to fire quickly, and then come back and trim this back so that it doesnt over-do the initial rev-up. Modules and Sensors. Terminator EFI. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Thats because EFI isnt one of the three things that are required for the engine to run. And the smell is just about gone. Engines making up to 500 HP (Boosted or Dry Nitrous) HyperSpark Ignition for Sniper EFI. Lets dig down into that a bit and see if we can help. Awesome Article. Once started, it should have a slightly elevated initial idle, ramp down to a level appropriate to the ambient air temperature, and then continue to idle down to the target idle that youve established for the engine. A key at the top of each log shows the signals associated with each color. I'm trying to get this article done. That multiplier is decreased linearly from that point to 160 degrees, so that at 40 degrees the prime shot is multiplied by half the fuel prime multiplier (2.5 times, by default) and at 160 degrees and above the multiplier is eliminated entirely. Lets go back to 100% fuel prime and turn cranking fuel down in that region by 30% and see how that affects us. Compression, properly metered fuel, correctly timed spark. Cranking fuel lets us compensate for that drop in pressure. Gauges and Displays. Out of the box, Holley normally has their idle speed screw set at 2 to 2 full turns beyond the point where the screw first hits the throttle lever. These are all ballpark estimates and are The Sniper line of fuel pumps, regulators, and filters make Sniper a one-stop shop for a complete fuel system overhaul. Terminator X. HP EFI. Our payment security system encrypts your information during transmission. Harnesses. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. Copyright 2023 Redline Motorsports inc.. All Rights Reserved. I look forward to your opinion on this matter. Since the launch of the brand in 2008, we have introduced multiple styles of high-performance, affordable alloy wheels that fuse traditional hot rod styling cues with modern sizes and classic finishes. EFI Systems based on Holley's world-class Dominator and HP ECU's. Tune Up Kits. So, yea it gonna ALWAYS be hard to start!TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected to a voltage point that MAINTAINS 12 VOLTS WHILE CRANKING THE ENGINE! That helped. Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle. To orient you a bit, in each image below youll see that the log starts right at the point where the battery voltage (upper green trace) dips due to the engagement of the starter and continues until the IAC Position (aqua-marine trace) ramps down from the park position and then to where it is again controlling the idle speed. Part# 526-5. (Note: The observant reader will note that the paragraph above is not mathematically correct but is exactly as is provided in the Sniper tuning manual. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. Bolt-on carburetor style EFI for your classic car or truck. Harnesses. Do you have a Sniper EFI Fuel Tank System that needs more than the 255 LPH fuel pump can supply?&nbs.. $155.50 $139. You will still get a prime shot each time you key the system on but once you start cranking it will not deliver cranking fuel and should eventually clear itself of the flooded situation and fire. Atomic EFI. WebSniper EFI 4BBL Master Kits with Fuel System Sniper EFI Super Sniper EFI 650 Super Sniper EFI 1250 Filters, necessary hardware and bulkhead fitting to return fuel into the tank!) Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. Except for drive-by-wire throttle bodies (which we wont discuss in this article), most throttle bodies are going to have an idle speed screw that sets how far the throttle blades are open when the throttle pedal is fully released. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. holley efi. Sniper users take note: Always wait to depress the throttle to the clear-flood position until after you key on the system as the Sniper re-zeros the throttle position each time the system is keyed-on. WebHolley Sniper EFI 2300 Self-Tuning Master Kit - Shiny Finish + 3 Images. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. Chris is my go to for any issues that arise with my sniper. Magnetos. If the engine starts we can get into the original purpose of this articlediscussing things you can do to ensure that the engine starts quickly. Injectors. Gauges and Displays. Step 4: Swap Accessories. 2023 Holley Performance Products, Inc. All Rights Reserved. HyperSpark Ignition for Sniper EFI. Legacy EFI. "Wouldn't the prime shot be half (2.5x) at 60 degrees and not 40 degrees? Injectors. The Ordering process was so easy and non-painful. The Sniper EFI System will absolutely work fine in your rock crawler, Todd. Did you hear the fuel pump run at key-on? Reg. Sniper 2GC EFI System, Engines making up to 650 HP (Naturally Aspirated) *Possible delays due to Covid-19 click for more information. $365.95. Twin-4BBL Carb Engines making up to 1000 HP (Boosted or Dry Nitrous) There is very little downside to having IAC Park Position be too big. You'll note that the pressure drops at that point. A little "Street" truck at the NMRA Race in St Louis 2019, Twice As Nice - Redline Build Click Here to Read the Full Article from May 2017 Race Pages, THE GATE-WAY DOMINATOR KIT 2010-2014 CAMARO SS, Terminator X & X Max Stealth 4150 Kits (Carb to EFI Conversion). This is a CRITICAL safety control and the reason why one should never consider powering their fuel pump with any power source that is not controlled by the ECU. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. In fact, MOST of the points on the fuse block don't do that! Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. It's been a few years now since the Sniper EFI System has r.. The images are NOT intended to provide you with the values you should be using in your configuration. The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. They are the only ones got me a holley usb to can cable fast. But don't think that you're getting short-changed. Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. Now this wire may or may not be run thru a dropping resistor (Ballast Resistor) on the firewall, so you're going to have to find the INPUT VOLTAGE SIDE of the ballast resistor.Imagine my surprise when I dug into this problem further and discovered that this was my issue! WebSUPPORTS UP TO 1,400 HP with EFI & BOOST. WebHolley Sniper EFI Fuel Tank Systems 19-185. Bolt-on carburetor style EFI for your classic car or truck. Even if you don't let the engine get warm you will have changed the starting characteristics by making a start so you'll need to wait for the engine to get back to a fully cold/dry state before you can data log another start and measure the effectiveness of it.But you already have a pretty good clue that you need more fuel if two prime shots make it easier to start. Replacement Fuel Tank- Sniper EFI now offers bolt-in fuel tanks for most popular applications, these require assembly but include new straps, fuel pump and sending unit. tech. Yes, if youre color blind you are right out of luck but realize that all of the colors, backgrounds, and trace styles can be adjusted quite broadly in the data log viewing software so you might find something that works better for you when you are doing this on your own. It is reliant on the data acquired by the included wideband oxygen sensor. Need advanced tuning capabilities? Find your engine to be in one of the gray areas? Ignition Harnesses. Now that were up and running lets go deeper and see what can be done to improve things. Capability Range: Moderate If youre OCD you could go on forever but this is going to work well for anyone. Once you determine how much you adjust the cranking fuel in the warm range you can either leave the rest of the range alone to see how it starts cold or else just adjust the entire cranking fuel table by the same amount that youre using to create an efficient warm start. The Gap-FillerThose of us who have followed the development of the Sniper EFI System had identi.. 239 Products. It will add fuel based on the temperature and won't affect your warm start.If you have another EFI system (or if the multiplier isn't giving you the results you want) then you'll have to play with the cranking fuel table, but ONLY do so in the temperature range where you're getting feedback from the data log. i.e., 5x at -40 and 0 at 160. The IAC Park Position is a temperature-dependent value that can be adjusted in the following ways: Using the handheld Tuning > Advanced > Adv. WebFeatured Items. For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. Find a lower price anywhere and we'll beat it by 5%! Magnetos. Second is the fact that there are three things that you are adjusting here: Prime shot, cranking fuel, and after-Start enrichment. Any time you want to explain data logs and actions. Unlike the former, Holley Sniper EFI will make you spend over $1000 for that combo. Flowmaster. You see, Holley has done away with the ECU box entirely! Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI) Integrated ignition timing control & coil driver kits--and they have accomplished just that. WebEFI Fuel System Components. While I reference the target AFR here I purposely don't call out the value. How To Sniper EFI in-tank retrofit fuel module. WebSniper EFI. This is a huge improvement over what we got initially. That should be adequate to get the engine running. Sniper plumbing is high-performance equipment with hand-polished aluminum fittings and highstrength hoses. What this tells us: First, we dont have any huge problems. analog-display gauges? The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. YOU ARE NOT JUST BUYING PARTS, OUR SUPPORT COMES, WITH EVERY PURCHASE, WE HAVE EXTENSIVE KNOWLEDGE, IN ALL TYPES OF APPLICATIONS, N/A, TURBO, BLOWER, OR. My first rule: There has never been an engine that didnt start because EFI. WebEFI Fuel System Components. Advanced throttle body injection systems capable of transmission control and more. Injectors. For FiTech, the cost of a high-pressure system and the EFI system will be under $1000. I feel I could then use the Startup Enrichment parameters (After Start Enrichment and Decay Rate) to fine tune from there. Estimated Ship Date: 02/03/2023. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Advanced throttle body injection systems capable of transmission control and more. Injectors. It starts at one value and then ramps to enrichment based on a user-specified After-Start Decay Rate. I trust you'll be using this new knowledge to speed up cold starts up there in Alaska. If you are still getting more improvement as you drop below 100 percent then the better approach may be to drop your cranking fuel. This gives enthusiasts the ability to pick a perfectly sized set of wheels without breaking the bank or waiting weeks or months for the finished product. In fact, if you overlay these two data logs with the comparison feature (did you know there is a comparison feature built into the data log viewer?) You can. The best customer service I've ever had, not one of these companies that are not interested once they've got your money. You can adjust your after-start enrichment values in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > After-Start Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Decay Rate tab (Also called After Start Enrichment Time), Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Holdoff tab, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Enrichment tab. "I've edited the article with a note about the difference. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. Sniper EFI is economically priced so you can have all the benefits of Fuel Injection and still have money to finish or upgrade the rest of your ride! you will observe that they are almost IDENTICAL when it comes to AFR. Sniper XFlow 4150 EFI System, Engines making no less than 800 and up to 1250 HP (Naturally Aspriated) Default values on these are 150% and 5, respectively. But with patience you will get there. Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Hilborn EFI Systems. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) The learn function will offset the base fuel table until the closed-loop compensation only requires minimal changes. .. EFI for Quadrajet Users--Sniper Quadrajet EFI SystemIf you have on of the countless .. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. holley sniper efi. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. Tim King. Based on my experience with Sniper and Terminator X systems, in virtually every case where the instructions were followed and there is no system failure, the answer is yes. I can't recommend EFI System Pro enough. Microsoft is quietly building a mobile Xbox store that will rely on Activision and King games. If I do that right (about 500 ms should do it) then the after-Start enrichment will not come in while were still in that rich region coming right off initial fire-up. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. install the new Sniper EFI system from Holley. Probably 3-4 seconds, and rich after it does fire. REPLACEMENT FUEL TANK (non EFI) $116.95. In most cases these are bolt-in replacements for the carburetor-style fuel tank that came in the car from the factory. WebFight for a progressive future by growing and wielding the grassroots political power of young people; Build power on the ground and online for the youth vote I called the tech support number and even though i did not purchase my system from them they were very willing to help. The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. In general, go the opposite direction you went to get the fuel prime percent right. I hope to do more articles similar to this so stay tuned! That amount of air is determined by the IAC Park Position. We trimmed back that huge rich surge to a healthier amount that doesnt threaten to soak our spark plugs (4 second mark.) Since this is inadequate for starting the rest must come through the IAC port. WebHolley just brought EFI within range with Sniper EFI! Flowmaster. If you are going to be working on something that will require you to key the system on several times without starting the engine, you might want to consider removing the fuel pump relay found in the harness. lock and flooding are all replaced by EFI reliability at a cost not much above a Microsofts Activision Blizzard deal is key to the companys mobile gaming efforts. Continues rich and then goes a bit lean. manifold then you have already displayed about half of the technical skills needed to This goes to show that you don't need a degree in tuning to make positive changes in the configuration of your EFI system. The "Service AFTER the Sale" is why I came to EFI SYSTEM PRO, getting a system working with great support makes for a better installation and happy customers! Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. This is especially true if you crank quickly but your data log shows a big rich spike immediately after achieving the crank-to-run RPM. Terminator X. HP EFI. This is the crank-to-run RPM. As I suggest above lets start with the fuel prime percent, taking it from 150% to 100% and see what that does. Legacy EFI. Perfect for owners working on a project that requires a new tank. Your engine will be dependent on cranking fuel entirely. Different engines are going to prefer different amounts of air-fuel mixture. Wiring Shop. $365.95. halibrand. greatly affected by an individual engine's displacement and volumetric First, remember that after-Start enrichment is not a fixed value. Hilborn EFI Systems. Ignition Harnesses. body injection unit, there is really no need for a harness, in the traditional sense. The way you write makes it so easy to understand. All of these estimates assume gasoline. It starts fairly well. Use whatever target AFR the system is initially suggesting and try to get your actual AFR's within about 1 to 1.5 of that value. Part# 19-102. There are different ways to plumb the fuel system. Sniper EFI System Replacement and Upgrade Components has everything you need to accessorize, repair, or update your Sniper EFI System! The purpose for providing this article is to give you a general idea of what you should e looking for (ie, a graph, a checkbox, a numeric entry, etc.) Nearly all of the sensors are built into the throttle body, so all you have to do is add is obvious to most folks but allow us to elaborate. The default for these systems is 400 RPM. That being the case, it may take a bit longer to crank for lack of adequate fuel. Want to add some of Holley's beautiful But weve also introduced some leanness from 4-10 seconds. I always recommend fixing one thing at a time. Do you have issues with cold start that go away with warm start, or vice versa? Add To Cart. Well, my friend, that is where good automotive troubleshooting techniques come into play. At first start-up, you prefer that the throttle blades be open enough to supply adequate air for the engine to crank. It is also coming through the idle air port. Part# 19-355. EFI Systems based on Holley's world-class Dominator and HP ECU's. Thanks for the kind words, Tony. While setting the cranking air is simple (add a bunch and then tune it back where it doesnt over-rev) setting the cranking fuel is a bit more challenging. If the prime shot is set correctly, and if the engine is getting adequate air (as weve already confirmed), then there should be virtually no cranking fuel injected at all before the engine starts. Does pressing the throttle slightly allow the engine to start. $556.95 $619.00. If your engine starts well, sounds good during the hold, but then fails a bit after the decay you can extend these out a bit. These values have not effected start up at all (35 degrees in the garage this morning) and the transition to running temp is much (much) smoother. The new Sniper family of How To Install A Holley Sniper In-Tank Retrofit Fuel Module. Harnesses. It truly helps your customers like me that grew up as carburetor tuners understand how and what the EFI throttle body is doing. Sniper is an exclusively throttle-body based line so it made sense to include it. This is normally completely adequate. Sniper AN Fittings such as Legacy EFI. Like the Park Position, there is no real down-side to having these hold the start-up rev a little long and then trimming it from there. Hilborn EFI Systems. Capability Range: Moderate The A/F Ratio starts at -1.0 and decays to zero at 140 degrees. Eliminate Rust & Dirt with a New Fuel Tank; Shop Fuel System. Bolt-on carburetor style EFI for your classic car or truck. 2023 Holley Performance Products, Inc. All Rights Reserved. Am I following this correctly or not? Free ground shipping regardless of order size! Complete Vehicle Management Systems for Any Motorsport! Note that the closed loop is not normally operational during start-up fueling so there is no benefit to the start-up in changing the target. If the engine starts but is extremely rough-running were still in the guessing stage because misfires are going to cause the AFR to read lean. Engines making up to 1000 HP (Boosted or Dry Nitrous) WebHolley is the source for your air and fuel system upgrades! Ignition and Electrical Components. Gauges and Displays. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. Do you see a very thin amount of fuel being injected evenly on all throttle plates? A Sniper EFI system requires the use of 100 micron pre-filter and 10 micron post-filter. Harnesses. Sniper & Super Sniper 2300 2BBL EFI System (The best 2-BBL choice in most cases), Jeep 258 CID Engine with BBD Carburetor and original air filtration system WebHolley just brought EFI within range - introducing Sniper EFI! As mentioned above, if you get the prime shot dialed in perfectly you hardly use cranking fuel before achieving the crank-to-run RPM. Capability Range: Advanced Occasionally Ill reference things based on the time scale you see at the bottom of each data log. This isn't just a good place to start your EFI Videos. Dominator EFI. Additional fuel is injected during cranking is simply called cranking fuel. WebIncludes 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! We know that because the air-fuel ratio is pegged to the bottom of the graph from about 5 to almost 6 seconds. REPLACEMENT FUEL TANK (non EFI) $116.95. That delay is called After-Start Holdoff. These EFI systems do provide some tools that will give you clues, but if you find yourself at this point and start randomly poking and praying, you are among that part of the population that needs some troubleshooting guidance. Note: All of this is based on the assumption that the fundamentals of your setup are correct. Modules and Sensors. Thats what we want, right? Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. $ Sale $ Save $ 310.02. Holley EFI Fuel System Kit. If you can bolt a carburetor on an intake EFI Fuel System Components. The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. Injectors. FREE STARTUP TUNE SPECIFIC TO YOUR VEHICLEWITH EVERY HOLLEY EFI SYSTEM PURCHASED. Tune the cranking fuel in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > Cranking Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Cranking Fuel. Redline 8 channel CAN EGT Kit for Holley EFI REDLINE COIL-NEAR-PLUG SMART COIL KIT Redline Mod Mount for Crank OR Cam Sensors on 4.6/5.4 Fords (SOLD INDIVIDUALLY) Part# RED-MMCSA $ 72.22 $ 70.00 ; RF Shield Part# red-rfshield $ 34.95 At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. That is not the case. Another great dissertation. Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. The Daddy of All Sniper EFI SystemsThat's right--nothing else is even close. Holley Performance Products is the parent company of Rocket Racing Wheels, a brand reminiscent of the 1960s, the golden age of Detroit automotive performance. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. (These are the best 4-BBL choices in most cases), Engines making up to 700 HP (Naturally Aspirated) Great work! We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) This is obviously an ongoing process. (Dont forget and then later wonder why it wont start!). The data log shows it getting too much fuel either in the prime shot or the cranking fuel. Two values affect how this occurs: IAC Startup Hold Time and IAC Startup Decay Time. NITROUS AND ALL TYPES OF FUEL, GASOLINE, E-85. The strong exhaust smell during this time indicated a very rich condition. Getting it smoothly to operating temperature was. The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. Ignition and Electrical Components. Legacy EFI. Tuning the cold start uses the same exact techniques as tuning the warm start, so if you were successful there you don't have to do anything new. You have that where you want it. EFI System Pro had everything I needed for my EFI upgrade. Add To Cart. Nice catch, Ken! A Great Place to Learn About EFI Systems. Free ground shipping regardless of order size! I won't buy anywhere else. What is important is that you understand what happens at this point. Also in Tools, Shop Equipment & Chemicals, Cataclean - Fuel and Exhaust System Cleaner, Cataclean Diesel - Fuel and Exhaust System Cleaner, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Hooker Blackheart Gen III Hemi Swap Mid-Length Headers, Power Steering Kit for Gen III Hemi Swaps - Early Car - Low Pressure, Urethane Leaf Spring Heavy Duty Shackle Kit, Urethane Leaf Spring Shackle and Bushing Kit, Finspeed Launches Line Of Ready-To-Ship Lightweight Track Wheels For Porsche 911 (992) GT3. Atomic EFI. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. 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