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Who knows. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. Spray a rag down pretty good with brake cleaner. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. Only a few hours on the motor but so far so good. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . Sorry for the late reply, Douglas. With the sniper as long as you locate the o2 sensor where it gets good feedback and stays dry long enough to get a good tune you could lock it so even if the o2s get wet it still runs good. Free ground shipping regardless of order size! It flows 850 cfm and can support up to 650 horsepower. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. Then if you are do you just wire the o2 sensors in parallel or do these EFI kits have inputs for more than one sensor. You are using an out of date browser. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. Will I be able to control my ignition timing with the Sniper? An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. To take advantage of all the site features, please take a moment to register. CTS (Coolant Temperature Sensor) - Reads engine temperature. Stock manifolds? EFI System Pro also has a good bit of tech info on their website. Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. No matter what I do, it will not start. For a better experience, please enable JavaScript in your browser before proceeding. Aftermarket headers are pretty much the only safe way to run an O2 sensor. To simplify . It may not be enough to cause problems with the way the engine runs aor even make into the cylinders, but it is enough of a mist to take out a O2 sensor. Everything about the fuel prime shot can be adjusted. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Got a picture? In this case, the prime shot is good for cold, but too much for warm. I am considering the Daytona Sensors Ignition module. Sensors that are installed in an exhaust must be connected to a properly functioning controller during engine operation Additionally, if an Sniper or Terminator X EFI System has repeated O2 sensor failures and none of the above-listed suggestions seem likely then contact Holley and arrange to have the unit tested. But for just over $10 and two simple configuration changes you can switch to a progressive linkage that opens only the two primary barrels at first and then brings in the secondary barrels at a later point. Depending on how fast you want one, there are plenty out there: The Cross ref numbers on the Holley forums and the Net is a Bosch 17025. Mine is right where Steamers is, and works well with my AFI TBI. looking at doing the same. . I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. I am a competent mechanic and I have checked all the usual suspect items. There is no problem getting this tuned and then running open loop. Other? Capability Range: Advanced Greatest struggle is the shift interrupt. Holley EFI Oxygen Sensor. . This really applies to any O2 sensor regardless of EFI system. No worse than taking the reading in the intake manifold cross over. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. I installed a holley sniper kit. As a follow up, I ended up using an eBay type anti fouler elbow for the O2 sensor to try and get it out of the water in the manifolds. AFR was 19 area. You'll also notice that the firing order is 1-6-5-4-3-2. EFI Systems based on Holley's world-class Dominator and HP ECU's. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Make sure to put anti seize on the threads. This free oxygen is picked up by the O 2 sensor and determined to be indicative of a lean AFR condition when, in reality, the engine could potentially be running slightly rich. I will keep the in-line pump for a spare. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? That's great--we look forward to your results! I have a 74 bronco, 302, mild cam. I'm using the NTK sensor. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Holley 554-100 NTK Wideband Oxygen Sensor. An O2 sensor is used when converting an engine to fuel injection and wanting to move from an "open loop" system to a "closed loop" system. Specs. 10 min read. Ref: https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/I heard of the new Sniper EFI from some chatter on OffshoreOnly.com. It would cost considerably more but a second option that would have added performance benefits would be to switch to a dry manifld such as the headers available from Custom Marine, Inc. CUSTOM ART FOR CUSTOM NEEDS. Distributor and ignition box? Sensors that are installed in an exhaust must be connected to a properly 5. Or maybe I could just use a piece of spare/junk exhaust tubing, and bolt it to the manifolds and add a weldless O2 bung to it. What is your fuel pressure at the carb during crank? Holley EFI has the solutions you need to get your project up and running better than ever! Register now for free!) The spark must be manually tuned. Still needs a EFI pump and return line. I have searched thru the forum as much as I can, with not much luck. The very front would be the safest place. The Holley Sniper EFI Quadrajet is a self-contained throttle-body injection system that's a direct replacement for spreadbore Quadrajet carburetors found on many classic GM vehicles. Is the O2 sensor on the dyno must have a very long pipe extending past where it is positioned or backwash from the room air will violate the readings as well as any header leaks. Brand: Holley EFI Emission Code: 5: Material: . Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Q1. Part # 554-155. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Essentially, when I push the clutch in and ease on the brakes to coast up to a stop light, the AFR goes lean (18:1 or so) and the engine stalls. He is a wizard, might be able to give you some pointers, will ask you what version of the software you are on, whether you're running the progressive adjustable linkage, etc. After discussing it in this thread and talking with Holley's tech support, I decided . Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Your BluePrint Engine will be equipped with a Holley model 550-510, or 550-511 (identical except for finish color) on 4150 flanged intake manifolds. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Emissions. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. For now I have a genuine bosch O2 and Standard Automotive TPS installed. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. As always, your results may vary and batteries not included. But you still risk a little water running back at low Rs. But it is going to be a little tricky. 2014 FJ Cruiser - White - 4X4 - Loaded - . Finally, do you also recognize that the self-tuning feature of the Sniper EFI may not result in an acceptable configuration for your boat and, as such, may require you to seek professional tuning? If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! $43 per night (Latest starting price for this hotel). There can be leftover debris from manufacturing that have been washed down and are now clogging one. Plug into the coolant temperature sensor. The very basic fuel and spark tables are the limiting aspect, Holley does offer advanced software for more precise tuning. 2 Reviews. https://www.efisystempro.com/efi-pro-hangout/sniper-installation-tips-holley-tom-kise, https://www.efisystempro.com/efi-prng-engine-startup-sniper-terminator-x-stealth. I had a blue wire coming out of the firewall that met this need, but it was already hooked-up to the + side of the coil and the Duraspark box. Jun 7, 2021. Everyone raving about customer service is telling the truth! I would prefer to run this brand new Holley EFI system in a closed loop, not set the fuel map, and use the O2 sensor as only a sensor. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. I upgraded from terminator x Maxx to dominator.. bought a 2nd o2 sensor kit with Bosch sensor and used an off the shelf Bosch I had been using with terminator. My first install was on a stock manifold and I installed it in about the same spot Steamer (above) did, except 180 degrees the other way, facing towards the front of the vehicle. $119.95. Just a rumor. I put mine after the collector only because I have a new exhaust and muffler going in and Ill use a weld in bung and placement will be different. Thanks for the feedback on this adapter, Donald. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. 10 min read Video. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. holley sniper efi Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish $1,475.95 Part# 550-511K holley efi 100 PSI Stainless Pressure Sensor $155.95 Part# 554-102 Are you waiting to convert your carbureted vehicle to Sniper EFI, but don't like the idea of mounting an external fuel pump? HP comes from torque and rpm and rpm breaks things and increases wear. EFI System Pro had everything I needed for my EFI upgrade. Holley part number 554-155. I stopped by Bergeron on my way back to the lake, and he said they have never found a good way to run O2 sensors in a marine exhaust. The plan is to 'learn' a fuel\Timing curve with a closed loop. Purely coincidence about the '2300' number. I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? Please consult the Holley Sniper full manual and use this guide for supplemental clarification. Maybe this one has a shorter cable? That sounds like one solution. It may not display this or other websites correctly. Brand: Holley EFI Emission Code: 4 . . It is possible for the ECU to have an internal failure that can kill O2 sensors. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. The Sniper EFI throttle-body drops in place of your . The truck started fine after install, and ran down the road ok. After some time, the truck will not start after it comes to operating temperature. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. The ones in the Bosch box come without warranty. Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. You can selectively provide your consent below to allow such third party embeds. The engine RPM when closed loop o2 will begin. Sniper EFI Installation Guide. They are about 4 inches long, in-line between the log and manifold. Joe, where did you end up installing the o2 sensor on your setup? Any word on this? I stopped by Bergeron on my way back to the lake, and he said they have never found a good way to run O2 sensors in a marine exhaust. http://forums.holley.com/showthread.ension-Harness, http://forums.holley.com/showthread.4388#post54388, If this is your first visit, be sure to PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. Its the Holley Pro Jection TBI mentioned by the above poster. turn on the ignition.but do not start the engine. What I installed on the motors was the Holley HP 19lb Holley Injectors the Holley 522-198 duel sync distributors with the MSD Digital 6A and the MSD Blaster 2 coils. If you find that please let us know. Still trying to find more info on electronic conversion, only found Pertronix replacement for points so far.. What TBI, fuel pump, sensors and ECM computer are you using? Holley Sniper EFI Oxygen Sensors 554-155 It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. The spark must be manually tuned. so simple check first, whats the fuel pressure? Bolt-on carburetor style EFI for your classic car or truck. This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Price Point: $$$. The wiring was a bit of a mess. Find a lower price anywhere and we'll beat it by 5%! So much it could be. Holley EFI has the solutions you need to get your project up and running better than ever! Phil is right. I have searched thru the forum as much as I can, with not much luck. RPM going up and down , miss firing and backfiring. Once the tune is complete, the O2 sensor can be defeated or . That is defacto step one in trouble shooting fuel injection systems. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. Add to Cart . Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. Affiliate. Ordered another dominator Bosch from Holley and it matches perfect. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. To those who have installed the Sniper EFI units, please post up some photos of where you tapped the exhaust line to install the Oxygen Sensor's weld bung. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. However, advanced tuning software is available for the Sniper EFI System that allow them to be tuned by a competent professional with experience tuning marine applications. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. 3. 02/25/2020. From there, our highly trained factory refurbish technicians flow the original fuel injectors. Capability Range: Moderate a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. Find a lower price anywhere and we'll beat it by 5%! Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. All I can say is it made a completely different motor out of the 460, 39 degrees out and starts within 2 revolutions power is super smooth throughout the rpm range (idle to 4100rpms 212 Hamilton with 4.0 turbo impeller) has about 6 hrs of learn time. My bet based on longer pump run, to make pressure, you have a leaking injector. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. The boat underway acts very much like a water brake dyno I strongly believe that a well broken in engine in good condition can stand a much more critical tune w/o issues and deliver almost the same fuel economy as the proposed EFI conversion. EFI EFI kit electronic fuel injection. Master ASE tech since 91. O2 sensors are water proof. The O2 sensor burned out immediately. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. i thought about it, but after $3400 on an EFI alone and an entirely new rigged boat Im having a hard time forking out another 2000 for an exhaust when I may just do an open loop My buddy machined up a set of spacers I sketched out for him. If you let it cool down again, does it start up fine? 5. YES! Go to the web site and it will explain the installation it is very simple and works well.As for the rpm you are comparing to completely different animals (pumps). Thanks for that, Danny. Holley Sniper O2 sensor replacement. Note the temperature sensor mounted on the back of the driver side head in the above photo. If this is a first time effort, find a tuner in your area with marine experience. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Was in marine engineering for years. 2. In Stock. The Sniper EFI master kit contains the most complete EFI fuel system on the market.