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Why? I am having a 2 572 BBC being built for my boat. Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. 4-hole spacers seem to work better than open spacers. It will come back up when the engine is running.If you have fuel pressure then you've got to dig deeper. is setting themselves up for unnecessary frustration. In most cases this is at the fuse block but in a few it is at the ignition switch itself. Why cant the internal regulator be removed and this same port still be used as the return when using an external regulator? Is a tremendous volume of fuel sprayed in all barrels? Can I use this for the return.Thanks for the help, I have checked my wiring and also had an auto electrician check it all out also. In my experience startup fuel tends to be too much. Pinched or Burnt O2 sensor Wiring: Keep it high, tight, and safe. When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is restored to pin 86. Learn all this in less than 15 minutes.Links to products in this videoHolley Sniper Fuel Pressure Regulator https://amzn.to/3RC8b3MAEM Fuel Pressure Regulator https://amzn.to/3qg3wccHolley Sniper Fuel Pressure Gauge https://amzn.to/3et1eDJGauge Adapter https://amzn.to/3erB0BwThank you for tuning in.Please Like \u0026 SubscribeComments and encouraged and appreciatedThanks again, Troy Kanevtwinstov8s.comhttp://facebook.com/vtwinstov8s.comhttps://www.instagram.com/troymkaneinc/https://twitter.com/troymkaneinc There should be 1 AWG or larger ground strap going direct from the battery to the engine. This is a bit tricky. This Mr. Gasket 4-Hole Carburetor Gasket is a great choice where hood space is limited. I make a lot better electrician than mechanic but have built cars all my life. Holley told me I do not need a pressure regulator beyond what is built in to the sniper. "[3] In April 1905 Holley Brothers Company was established with an address at 661-75 Beaubien St., Detroit, Michigan. Remove the return line outlet fitting to expose the regulator as seen in the diagram below. EFI doesn't have feelings--it doesn't care what cam you use. When a wide band sensor is (DAMAGED) it almost always reads dead lean. PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. Read the instructions and Follow them. Is a tremendous volume of fuel sprayed into just one barrel? Whats the fix? Is that an expectable by-product of adding this relay? Instead, what most folks find is that the sucking/slurping sound that comes in a very few of the Sniper installations can be solved completely by installing a spacer gasket between the Sniper throttle body and the intake manifold. Don't be that guy. Holley, while serving as president of the Holley Carburetor Company, was also a director of National Air Transport, Kinner Airplane and Motor, Stinson Aircraft of Detroit, Air Investors Inc., Towie Aircraft Company of Detroit, and one of the original stockholders of Western Air Express Inc.[11] In 1931 Holley became a director of the Warner Aircraft Corporation. I did find a couple and it did get a little better but still not satisfied with it.What is the ISC hold position for and why is it set @ 30? Which to buy Holley sniper or stealth Go Gators. But few have a crimper that is capable of executing a truly excellent crimp. This assumes the internal regulator is left in place, I assume. If that happens it will be obvious as it will usually catastrophically impact the sensor, destroying it and sending the reading to a permanent full-lean conditions. In 2000, Holley leased a facility in Aberdeen, Mississippi, with a plan to centralize five existing plants in the U.S., Mexico and Canada.[23]. There should be no relay added to this wire. This is why most OEM EFI pumps are in the tank. The price is only $35 so it looks like an easy way to simplify fuel routing in a new install. Help for our customers is just a phone call, test message, or email away. Filter Regulator Instructions Remove the existing fuel return line. Extending wires with too small of a wire gauge will also result in the same damage. First, it is fake news that EFI doesn't like big cams. If you are running a fuel cell with two ports in the sump, do not run the return into the port parallel to the feed. In 1998, Coltec Industries sold Holley Performance to a management-led team backed by Kohlberg & Co., L.L.C. Brand: Holley Product Code: 550-870 | 550-871 | 550-872 Availability: In Stock $1,445.00 $1,299.95 Available Options Select Sniper EFI System Color Include Bowl Connector Hose? "[1] The company today marks its official starting date as 1903 when they started mass producing carburetors for Henry Ford. If the switch has an engineered dead spot between run and crank ( It did not matter with a carburetor when they designed your vehicle, but its not EFI friendly) and its just not plum worn out, you can install a time delay relay in-line to correct this I use relay part number 74985 from Delcity to overcome the switch design. [22], As of February 12, 2008, Holley filed for bankruptcy. The Del City Time Delay Relay is pinned just like a normal relay. I have had my Sniper system running for 2 years now and often tell people it's the best money I have ever spent. I'm using a stock tank with one of these drop in fuel pump modules: Holley 12-319 Holley OEM Style EFI Fuel Tank Modules | Summit Racing I bought my EFI kit slightly used and it didn't come with the return line kit. If you have RF and or EMI issues you need to correct them. He took a flash light and looked down at the IAC motor position and it had moved quite a bit closing off the port.Now I had to try this and of course my results were not so lucky. Is there enough cable to get to the battery? Much appreciated. Fuel Pump Regulator and Filter / Regulators / Holley EFI Replacement Regulator Kit Larger Image Holley EFI Holley EFI Replacement Regulator Kit Replacement Regulator Kit for EFI Regulators and Sniper EFI throttle bodies. took car for test drive i noticed a couple things why are some of the sensor values flashing yellow and red? :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? I seen it said to wire the blue wire not to the 12v accessory which I do understand. Most important!!! Holley Performance Products - Wikipedia MAIN POWER AND GROUND need to go to the battery. I dont see why not. Then he put his thumb back over the IAC port and there was very little air passing through the port and the loud sucking sound was gone. Holley Fuel Pressure Regulator, 1 to 4 psi, Pegasus Auto Racing Supplies2475 S 179th StNew Berlin WI 53146 USA, Order Toll Free: 1-800-688-6946 (US & Canada), Local/International Order Line: 1-262-317-1234, Email - General Questions: CustSvc@PegasusAutoRacing.com, Email - Technical Product Questions: Tech@PegasusAutoRacing.com. With the aid of an accurate pressure gauge, it can be easily adjusted as required within its specified range. We wanted to see just how easy it is to install the kit, so we dropped it on a Dodge 360 stroker built by Bob Mazzolini Racing, the Mopar Specialist out of Riverside, California. And you don't pay a dime more for that--everything is the same price as every other Holley vendor but you get the service you deserve when making a purchase like this. [17] Holley was said to have a turnover of $40 million in 1967. If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. Super helpful and knowledgeable. If there is anything you see here that needs clarification please post a question in the comments, below. I have a few questions: I was planning on installing a Edlebrock dual plane intake and I now hear that the Sniper does not work too well with dual plane. Holley fuel pressure regulators help to ensure a constant, steady flow of gas to the carburetor regardless of variations in fuel pump output pressure. Chevy 350, rocker cam, mild cam. About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. All of these values are configurable. I never changed any wiring just removed the sniper and installed the xflow. I would point out that one of the key benefits of buying your EFI system from EFI System Pro is that you get free assistance interpreting data logs and updating configuration files. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. Enjoy! I am in the middle of plumbing my new sniper throttle body system. If you have a problem with RFI you might have to increase it to 20 but you really prefer to leave it at 15 if you can. Filter Regulators: 12-875, 12-876, 12-888, 12-889, 30-201QFT FREE Shipping on most $199 orders in the continental USA! A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. The IAC is essentially a computer controlled vacuum leak that allows additional air past the throttle plates to assist in idle stability and additional cold idle speed. Includes a mounting bracket, 3 sheet metal screws (for attaching the bracket to the car), and 2 self-tapping screws (for attaching the regulator to the bracket). You do have a fuel pressure gauge, right? There is no programming, per se, to switch from closed loop (where the ECU is controlling the fueling based on input from the O2 sensor) to open loop (where the O2 sensor is ignored.) The Sniper line of products are built to take your project to a new level of performance at a great price! The xflow instructions state it needs 60 psi. #1 Hello all, I'm running Sniper EFI on my 360 and was wondering how I'm to run the return. 2018 - Holley HP EFI engine control unit (ECU) became standard equipment on the optional NT1 engine which is legal for use in NASCAR Truck Series racing. Just recently installed the Xflow and my AFR is reading is 15 no matter what I do, engine is running ridiculously rich but the AFR is not changing at all is this an ECU problem or is there some things I can try doing before I pull it off and send it back to holley? Tri-Fives and Classic Trucks Hit the Coast: Huge Cruise Gallery! The Tech Tips and discussions are also great! DrEamer I suffer from cars on the brain! Hard to answer. One thing I miss is the instant drop in rpms that my 650DP had. Run the switched 12-volt back as close to the ignition as possible. By going with an aftermarket manifold you avoid that issue entirely.Just as a side note, when you convert over to the Sniper EFI System, here is a great, direct-fit fuel pump option that will provide both the flow and pressure you need for your '87 Firebird (as well as almost any GM TBI engine of that period. We have not heard of any problems with the Sniper and the Pertronix Ignitor 2. Yes, there should be a steady flow of fuel out of the return. Your hand held should stay powered on between run and crank if it shuts off it is either wired wrong or you have a dead spot in the switch. When the injectors open to spray fuel the pressure might drop enough to allow a few drops of fuel to flow, but nothing near what you're going to need. Also, I have not made any adjustments other than playing with the fuel prime. Feed pressure should be knocking on 58 PSI and the return should ideally be zero, if the feed pressure is not correct, or if the return line pressure is greater than 4-5 PSI find and correct the restriction before proceeding. The problem isn't the 55 PSI. If you're getting in the 10's your asking for issues. Capability Range: Advanced check out the. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. I'm glad that worked for you! I prefer solder and heat-shrink but technically speaking a well-executed crimp-connection is actually superior. You can adjust Terminator X systems to accommodate almost any fuel pressure in the software. Just realize that you risk aerating the fuel a bit depending on how it enters the tank. Don't hesitate to call, nights and weekends included.). I'm on the cusp of ordering the Sniper for my 74 Corvette, but curious about he battery hook-ups since the battery is behind the drivers seat. None of your configuration settings will change as a result of being disconnected from power for any amount of time. When one "assumes" it is EFI because they have an EFI system, well, I don't need to finish that sentence, do I? Good luck! Google Trusted Store reviewer. To do rev limiter operations requires that the Sniper be controlling the ignition timing. I am guessing you have some sort of current loop going on. I am running a wet exhaust with O2 sensor plates. Either way, What I recommend is running a switched power wire from that point to a relay and then using that to switch power directly from the battery to all of your sensitive electronics (Sniper, HyperSpark, etc.). Maybe I am missing something here. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. My car idles beautifully @ about 800rpm. [8] He had invented an improved refractory coating for casting molds, allowing permanent iron molds to make gray iron castings over many cycles, whereas earlier iron molds were quickly consumed when casting iron. Holley FPR Issues At startup the pump runs a few seconds, the ECU fires a prime shot of fuel, and sometimes the presure drops a bit in the process. We used Rockett 91-octane gasoline and the engine was filled with Lucas break-in oil. Find great deals and sell your items for free. Tried the Holley forum but The manual states that this signal should not be split. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector.Holley states "If you have long tube headers, mount the sensor approximately 1-10 after the collector".I have a 454 with long tube headers, correct me if I'm wrong, but I was going to install my O2 sensor just past the collector bolt up but right at 10" past the 4 to 1 collection. Stay after it--you'll make it happen! Sniper AN Fittings such as AN hose ends and AN adapters . This 1-4 psi model is preset to approximately 2.7 psi. Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? Activate Advanced Tables2. And I'll show you how in this video. Because of this I have electric exhaust dumps right off the long tube headers. Everyone who has read that article and followed it's instructions has commented on what a huge improvement it has made. Good point. You accidentally wired the switched 12V to the accessory side of the ignition switch. [5] As a result of the Motorette Henry Ford commissioned the brothers to produce a carburetor for his Model T. "The carburetor they built for Ford was an immediate success and the brothers founded Holley Carburetor Co., which became one of Ford's biggest suppliers. Not some generic pump as some have speculated. All fuel line connections must be leak proof. Sort. ), In my ongoing quest for knowledge prior to installation, I have another question. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. Holley Sniper Stealth EFI System 4150 | Ships Free at EFISystemPro.Com [24] The LS-Fest has a variety of bracket racing, engine swap, braking, autocross, show & shine and other events that attracted large crowds and participants to the show's venue September 1012, 2010, at Beech Bend Raceway in Bowling Green, KY. Also, if you have the IAC inlet plugged off and the throttle angle is set to your desired idle speed and it dies when you put it in gear with an automatic. Don't let that get the best of you. Had issues so Im now going with the Holley in tank pump. The domestic aftermarket performance world has been abuzz about the latest low-cost EFI systems, one of which is Holley's new Sniper EFI. I checked fuel lines to make sure I didn't reverse them. Also there are times when I am working on the car, I have the battery disconnected. Similar to figure 1-1 here: @GPatrick: I think your approach will work well for my current configuration. [2], "Their first original carburetor, called the iron pot, appeared on the curved-dash Oldsmobile in 1904. Causing your vehicle to run terrible?Do you have low fuel pressure making your vehicle have little to no power. Direct to the battery means to the battery. Thanks. Beyond that you're going to have to get Holley tech support involved. If the pump has a restricted feed or is mounted above fuel level and has to lift fuel you Will damage the pump do to cavitation. Any suggestions ? Many Holley Sniper EFI users have had problems as their fuel pressure is too high. Holley continued its dominance in racing, powering all winning NHRA Pro Stock racers and all NASCAR Sprint Cup Series teams. Hi Chris,Thank you so much for your quick response to my query. Holley Fuel Pressure Regulator, 1 to 4 psi Adjustable Availability. If the fuel pressure is a little low don't worry about that. Always up for a good comparison test, we ran the engine with a carburetor first to establish a baseline, then swapped it for the EFI unit. I am not interested in a EFI unit that looks like a carburettor. 2023 Holley Performance Products, Inc. All Rights Reserved. Connect the fuel line from the "out" side of the pump to the "in" side on the regulator. I have purchased two sniper EFI with the MSD distributor kit. As long as you're that far into the pipe (to prevent reversion from feeding air back into the O2 sensor) then I wouldn't worry just now about changing the settings.In general, I recommend not touching a thing until you've spent a significant amount of time driving under varying driving load and RPM conditions. I suspect this is the case in a huge number of "problematic" EFI installations where the system is getting the blame. You also need to properly phase the rotor. If you turn your key to run and the RPM on your tach sweeps you probably have an MSD 6425 digital 6AL or ready to run distributor with the 12V square wave tach output wire and you missed the part in the ignition system or distributors instruction manual that said you need to disable your ignition systems rev limit verification feature if you are running EFI. Sign Up. I am letting it set over night, cleaned plugs as well. :-). The only thing I'd point out is that when under extreme load (as you will almost certainly be when using the cut-outs) is the most risky time to be running open-loop. EMI is what wipes out all the electronics. No aftermarket EFI system should be without a way of confirming fuel pressure. Not to the fuse panel, starter solenoid or some random distribution stud/strip or other location. I could do this with either tank set up. Hi, I have a 1987 Firebird with 305 engine and Quadrajet carb. Sniper Official Site: Carb to EFI Conversions, Fuel Systems

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