I have not yet got it figured out. . WBO2 Sensor 17025 Bosch 554-155 Holley - EFISystemPro.com Note, that is not a crack in the exhaust manifold, just a shadow from a casting flaw. If you find that please let us know. You must log in or register to reply here. If the indicator reads "LOW Err" double check the connection to the CTS. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. As always, your results may vary and batteries not included. 5. If it's working to prolong the life of the sensor in the AEM Wideband kit then there is no reason to believe it wouldn't work with any other sensor. I hope that the next F/2F header is more O2 sensor friendly. In Stock. It flows 850 cfm and can support up to 650 horsepower. Sniper EFI 4bbl Marine. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . (REGISTERED USERS DO NOT SEE THIS POST/AD! Its the Holley Pro Jection TBI mentioned by the above poster. They are about 4 inches long, in-line between the log and manifold. I really dont want any issues on the whitewater lol 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. The Sniper EFI throttle-body drops in place of your . Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. JavaScript is disabled. Oops, after that it cranked right up.Idle was set to 950rpm so after the vid was cut off I lowered it to 820rpm and it was purring like a kitten.EFI for dummies. There was a 1.5 point difference in afr between banks. Add to Cart . You should then have at least 18-24" of pipe after the sensor. They have mods that help. Holley EFI Oxygen Sensor. The truck started fine after install, and ran down the road ok. I have a 74 bronco, 302, mild cam. Holley Sniper EFI Wideband Oxygen Sensor. The Sniper EFI throttle-body drops in place of your . The fuel pump question is the tough one. 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. Part Number: 510-554-155. Make sure to put anti seize on the threads. May 19, 2021. Part# 50-5009QFT. O2 sensors are water proof. Capability Range: Professional Holley Sniper EFI Oxygen Sensors 554-155 - Summit Racing Equipment I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. The clamp-on that came with mine wasnt a good fit on my 2" pipe. Adam. 3. 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. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. You have to angle it to help the throttle cable get around the booster. What is your fuel pressure at the carb during crank? 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. That's great--we look forward to your results! Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. We may earn a small commission from affiliate links and paid advertisements. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Master ASE tech since 91. No prime, but a second later it's ready to crank 'normally'. Precisely Adam. Followed all the instructions to the letter. The plan is to 'learn' a fuel\Timing curve with a closed loop. temporarily running without WBO2 sensor? - Holley Wideband Oxygen Sensor Extension Cable. 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. Taking a look at the holley manual I am thinking about drilling and tapping the front exhaust port on the log for the O2 sensor. Holley part number 554-155. What Is Pinion Offset, And How Does That Affect You? You are using an out of date browser. 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. This really applies to any O2 sensor regardless of EFI system. JavaScript is disabled. So I bought the progressive linkage but you then have . ), https://www.ebay.com/sch/i.html?_froensor&_sacat=0, https://www.amazon.com/Bosch-Automot1296929&sr=8-3, https://www.efisystempro.com/wbo2-seer-tbi-554-155, https://forums.holley.com/showthread2927#post82927. Any word on this? No, use only one 02 sensor, mounted close to exhaust manifold, or high up on a Header collector, not into a single Header pipe that merely gets a exhaust pulsation. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Aftermarket headers are pretty much the only safe way to run an O2 sensor. Plug into the coolant temperature sensor. pull the sensor out of the exhaust. When I went to Holley HP, I found an adapter by Innovate that is designed to draw air out the exhaust stream and away to the O2 sensor. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. Free ground shipping regardless of order size! Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. Register now for free! #1. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. 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. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. If he wants to run in closed loop and have the system adapting to conditions at all times, the minute he fouls he is dead in the water. Yes, this is going to be an added expense, however, it will help guarantee your success. It appears that its a tuning issue. Holley EFI Usb/Can Harness, Sniper Tbi. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? Once you have those points set, the rest of the map doesn't really matter, just make it look smooth/pretty and everything will be fine. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a "criss-cross" pattern (60-80 in.lbs.). Items 1 - 21 of 21 Items. Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. Bolt-on carburetor style EFI for your classic car or truck. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. All of the wiring begins at the throttle body and connects outward from there. Im almost at your exact same setup on a Redline 460/Berkeley pump but waiting to pull the trigger on the Sniper until I can pinpoint exactly where I can install the o2 sensor without the wet exhaust damaging it. 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. In the case of the car, you can generally get out and walk (run?) What exhausts are the best? Holley recommends a 3/8" fuel supply line. Seems to LEARN much faster than the Fitech did. It is possible for the ECU to have an internal failure that can kill O2 sensors. 02/25/2020. Initial Calibration in Basic Configuration. http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. EFI Systems based on Holley's world-class Dominator and HP ECU's. the engine not running. Car runs perfect . Is this a viable upgrade for my boat? When either of these operating temperature ranges is exceeded, the sensor can no longer be . It flows 850 cfm and can support up to 650 horsepower. Have engine apart and head checked and cleaned at machine shop. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. Yes, this is an old thread, but it's an old unit. Advanced throttle body injection systems capable of transmission control and more. I am considering the Daytona Sensors Ignition module. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after Holley Sniper EFI Oxygen Sensors 554-155 (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. RPM going up and down , miss firing and backfiring. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. 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. dropping a sensor on the ground), Extreme exhaust temperatures (Greater than 930 degC/1700 degF), Unheated sensor in exhaust stream. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. You are using an out of date browser. EFI System Pro had everything I needed for my EFI upgrade. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. Stay up to date with the latest releases, events, promotions and more. The reason I say this is that nowhere in this discussion is the fact that none of these systems are are handling the timing on the fly. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. Tune the delay relay timing to just miss the prime shot.For cold starts, a simple push-button or switch "choke" override to power the relay during prime would provide it. I do believe that the Holley EFI ECU's have the capability to be programmed to work in this application, but have not yet found anyone who has tackled this task and been fully successful.If you (or anyone else) does make some progress on this, please reply here and let us know what works. 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. Previously, none of Holley's throttle body injection (TBI) systems, such as the Terminator EFI were USCG approved (even though the HP and Dominaor ECU's themselves are.) functioning controller during engine operation. Sorry for the late reply, Douglas. 10 min read Video. I'm guessing by snail, that's another name for the riser? Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. 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, Holley EFI CAN to USB Dongle - Communication Cable, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Holley EFI Terminator X Wideband Adapter Harness, Earl's Oxygen Sensor Weld Fitting (Weld Bung) - Steel. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. #3. Sensors: Fitting: Threaded O2 . Specs. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. Dec 28, 2016. O2 Sensor in a boat exhaust | Performance Boats Forum Find a lower price anywhere and we'll beat it by 5%! I recommend popping for the Master . 5. Holley Sniper - Oxygen Sensor Location | IH8MUD Forum See Details. Can anyone share their experiences with this type of setup? - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? 100% identical. 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. Throttle body mounted ECU - no extra boxes to mount. Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Capability Range: Advanced The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. Part# 554-155. holley efi. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. For a better experience, please enable JavaScript in your browser before proceeding. Even if you are the sort to sort of shrug off safety regulation, consider that if there is an accident that results in a loss and an investigation, failure to follow applicable USCG regulation could result in either financial or legal liability, not to mention the rejection of insurance claims. a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. Q3. For the most part, the small harness is plug-and-play. Holley EFI has the solutions you need to get your project up and running better than ever! It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. Sep 14, 2021. I purchased the Holley HP MPFI system and went to the lake with it. However, there's a good chance you will want to add a wideband O2 sensor at some point, in order to give the MegaSquirt more tuning information. I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. 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. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? What you are able to accomplish with a Sniper is done exclusively through the setup wizard application on the 3.5-inch handheld.The Temrinator is designed to be set up with it's own setup wizard on the same 3.5-inch handheld display--but since it has a stand-alone ECU, it can also be fully programmed via the Holley laptop software. I installed one also on mercruiser 260 hp. Sort. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. Prime cannot be adjusted on this old unit. Still needs a EFI pump and return line. It may not display this or other websites correctly. Only a few hours on the motor but so far so good. Do you understand that no USCG-approved aftermarket EFI fuel system (including fuel pump, lines, filters, adapters, and hose ends) exists, that installing unapproved components on a boat will make the boat out-of-compliance with USCG regulation and could result in financial loss and legal liability (and that you release us from any liability by proceeding)? replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. My question is concerning what happens a year later, when I have a top-end swap . But this also makes me wonder what you did for the O2 sensor. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor.I also capped off the regulated return line with a hose, clamps, and chamfering bit.In the settings I chose closed loop disabled (set to open loop) and also set learn mode to disabled. In the event you decided earlier that you are going with the Sniper EFI System you will not have the requisite tuning capability by simply using the included handheld tuner. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . away. non biased Shelby Cobra related site! Anti-Seize pre-applied to sensor threads. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. Is this a good upgrade? That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Seems to have more low end tq and is much smoother power through out the rpm range. I'm having new headers with an O2 sensor bung installed in my car ('79 Vette) soon, to prepare for a Holley Sniper EFI TBI install this winter. For a better experience, please enable JavaScript in your browser before proceeding. Here's the pic of the location with my header. You need to intimately know the system you are using, its capabilities and limitations, install it correctly and have it tuned with someone with experience specific to marine applications. Add To Cart. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Miami, FL. Now the lower cost Holley Sniper advertised for March 31 2016. 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. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. When buying the Holley Sniper EFI kit, you've got two basic options. Holley EFI Oxygen Sensor. It looks like another season has come and passed by without the answer you wanted on this.I am impressed that you made the leap into marine fuel injection but you have experienced the same problem that everyone else who has tried this has faced. Apr 13, 2017. with the extension. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. The very basic fuel and spark tables are the limiting aspect, Holley does offer advanced software for more precise tuning. running holley sniper without o2 sensor - plural.works Part# 554-155. Don't know about HP increase, with the QFT 750 it would turn a 212/4.0 combo to about 3950 to 4000, the Sniper turns it to 4000 to 4100. Ordered another dominator Bosch from Holley and it matches perfect. A third option would be to run your EFI system without an O2 sensor at all. Maybe my manifolds leaked the inside between the snail and the log?? How To Properly Place and Install an O2 Sensor - Holley Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Are you holding your RPMs back with the MSD for some reason? Marc, you don't mention which system you installed but the Holley systems are fully configurable. Note the temperature sensor mounted on the back of the driver side head in the above photo. He also explains how to properly install them. Sniper EFI - Holley I received my replacement TPS and O2 sensor. Is Holley working on a complete marine package or planning to in the future? So there is at least some probability of success. $43 per night (Latest starting price for this hotel). I'm 3" down from the bottom of the flange to center of bung. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. Good luck! An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great.