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This was for MPFI. Do you recommend in-tank or external fuel pump? The new Exhaust manifolds will have wideband O2 bungs for tuning. Add to Cart . Wiring the Holley Sniper EFI system is equally easy. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? You'll also notice that the firing order is 1-6-5-4-3-2. For a better experience, please enable JavaScript in your browser before proceeding. Thanks again for writing! you don't want to read that loss. 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. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. When problem-solving this type of issue, consider when and how you could use a work-around. 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. Not sure how well the sensor likes being that close to the port. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. EFI System Pro also has a good bit of tech info on their website. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 534-199. This really applies to any O2 sensor regardless of EFI system. As far as spark control, the Sniper will let you tune those 4 points, nothing else will. Sniper EFI 4bbl Marine. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. away. It does not work with the Sniper EFI oxygen sensor. While this is extremely unlikely if you are having immediate, back-to-back O2 sensor failures you should make the effort to rule this out. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. I recognize that it would be an absolutely tremendous investment, but based on the overwhelming response we get to this post I am pretty confident that the market is there. 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. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Fine tuned the timing to 12-15 degrees. 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 hos. I thought the clamp on style mount was a good idea in case the threads got buggered up when a sensor change might occur, and the threads are rusted up by then. For gourmands, night markets not only offer scrumptious small . In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. Holley part number 554-155. The in tank pump is quieter, will normally run cooler and should last longer. *Possible delays due to Covid-19 click for more information. If there's anyone willing to read a bit and offer advice about what to do when doing a top-end swap (when you may be in a scenario with a new top-end that's the EFI isn't calibrated for AND you can't have an WBO2 sensor connected), please let me know. With a bad TPS you will have to manually prime to try and get it . They are the only ones got me a holley usb to can cable fast. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. 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. The O2 sensor burned out immediately. Yes, this is an old thread, but it's an old unit. The other thing I want to overcome is the fuel return line; my harbor master says that I can connect my fuel return line to my CAV (lucas) gasoline filter, it has 4 connection, now only 2 are used. Systems that were already designed for marine efi. Capability Range: Advanced Yes! I am interested in upgrading both engines with Pertronix Ignitor or Ignitor II ignition and the Holley Sniper EFI 2300 and the Howell EFI marine O2 sensor adapter. Supports up to 650hp with Four 100 Lb/Hr Injectors! Advertising . Precisely Adam. Add to Cart . However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. It's fast, simple and absolutely free. What exhausts are the best? 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. 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. Most of Holley's EFI systems provide a Setup Wizard that builds a base configuration file that allows you to start the engine and operate the vehicle. I have not gone back in to try to fine tune them. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Part # HM206. And the relay and fuse were mounted along the firewall. The test run was great, they have never run so well even when they were new with carbs. That's great--we look forward to your results! Joe, where did you end up installing the o2 sensor on your setup? I really dont want any issues on the whitewater lol So far so good. Any word on this? Yellow Init In First shown for an instant when the system is powered on. 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. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. It's a compact HP pump and cooler assembly. There can be leftover debris from manufacturing that have been washed down and are now clogging one. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. Car runs perfect . It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. You should then have at least 18-24" of pipe after the sensor. I think installing a wide band O2 sensor in the manifold(s) is a great idea. . Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! Mike. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. Holley EFI. As always, your results may vary and batteries not included. The Holley Sniper system sells for $999.95, installs in under 2 hours, and requires only an O2 sensor, a temp sensor (both included), an electric return-style fuel pump, and four-wires to connect.. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. My tune is coincidentally set at 11.5 desired afr, with the failed side as the leanest bank, but the ecu added 15% fuel anyways. Was in marine engineering for years. Install the throttle linkage to the Sniper EFI throttle body. What is your fuel pressure at the carb during crank? but I'm finding when running engines with holley sniper kits the the engines are very eratic ,the air fuel numbers are always changing drastically from one pull to . Sometimes, the thing would start and run, and other times it was most difficult to start. 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. It should be pretty straight forward what each of these values do. I installed the adapter and elbow so it's at an angle above the entry point. #1. Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. All times are GMT-6. 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)? In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. I was thinking aluminum heads would run it up closer to 5,000 rpm. While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. Register now for free!) Look at the bottom.. All of the wiring begins at the throttle body and connects outward from there. The light shines in the darkness, and the darkness has not overcome it. Maybe this one has a shorter cable? Sent unit back to Holley. Stay up to date with the latest releases, events, promotions and more. Capability Range: Professional Thinking about this I think this will work very fine! Anti-Seize pre-applied to sensor threads. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. 3. USCG approval is certainly worth careful consideration, as being on a boat that catches on fire is even more serious than being in a car that catches on fire. Hi all, i'm contemplating doing a sniper quadrajet swap onto my volvo penta 5.7 GL 2bbl holley motor in my 1997 cobalt 200 with the DP-S outdrive. Some logs have water up to just short of the port. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? RPM going up and down , miss firing and backfiring. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . 100% identical. Everyone raving about customer service is telling the truth! Adam. You have to one big hole in the riser, then you reach the cooling water, and one little hole in the next part of metal: now you reach the exhaust gasses. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Some of the landlubbers who are reading this may not realize that many inboard engines utilize what is called a wet exhaust, pushing the water from the engine block into the exhaust and then back into the lake/river/sea on which they float. Holley EFI Oxygen Sensor. I'm using the NTK sensor. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . Sniper EFI Installation Guide. Got a picture? blue doberman puppies. 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.) Super helpful and knowledgeable. I've dunked mine lots of times. 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. Holley Sniper EFI Oxygen Sensors 554-155 I just installed a Sniper on a 67 GTO and it was pretty straightforward, the end result was a much better starting/smother running car, than can adapt to elevation changes better, But we also installed the Holley Dual sync distributor for a complete system that adjusts timing as well. 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 registered members this ad will NOT show. You must log in or register to reply here. For the most part, the small harness is plug-and-play. Sadly, no. When buying the Holley Sniper EFI kit, you've got two basic options. If you are not running the latest software stop guessing and go download it. Yellow Cold! Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. It works fine. I am just now ready to do the tuning this weekend. I will get a new 02 sensor before I swap back to the orange box. Here is one on start up tuning. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Full product line and accessories at excellent pricing. 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. I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. 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. The target A/F value based on load or MAF cfm, and engine speed. The fuel lines and fittings are 3/8s with 8AN fittings and everything on the 60 requires 5/16 fuel line with 6AN fittings) Holley Sniper EFI 550-849 Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish. Not always the case with a boat. JavaScript is disabled. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. If this is a first time effort, find a tuner in your area with marine experience. Distributor and ignition box? Register now for free! You must log in or register to reply here. Holley recommends a 3/8" fuel supply line. The truck started fine after install, and ran down the road ok. 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. It is possible for the ECU to have an internal failure that can kill O2 sensors. Capability Range: Advanced Great Article. Do you offer a USCG fuel pump kit? All sensors are tested to ensure they accurately report critical engine data to the . $102.95. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. 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. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). 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. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Aug 17, 2013. Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street. The wide band O2 sensor is required for initial running and calibration. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. You are using an out of date browser. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. Part# 554-155. Are you running the entire system? Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. The O2 sensor burned out immediately. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. They have been working out well for a few years now. The first option is to just buy the injector body and the controller with the wiring harness and sensors. You can selectively provide your consent below to allow such third party embeds. Hopefully this one lasts longer than the original. Apr 13, 2017. with the extension. Everyone else was backordered several months. . Capability Range: Moderate 5. JavaScript is disabled. I tried holley tech support, no answer and put on hold for hours. Running? Add To Cart. Welcome to Club Cobra! ), 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. EFI Systems based on Holley's world-class Dominator and HP ECU's. QFI-500 Oxygen Sensor. I am looking for a TBI with full sensors, mainly atmospheric for Sept and Oct and a Idle Air sensor for warm starts.I welcome your thoughts.Regards, Sort. 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. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. Holley EFI Oxygen Sensor. Holley sent him a new one for free. I installed a holley sniper kit. I'm about to embark on the same type of project. What I think a lot of folks are missing is correct tuning of their carburetor engines Most inboard systems I worked on were intentionally set up to run rich with minimal timing (mostly to get through the warranty period). $43 per night (Latest starting price for this hotel). Sniper EFI 4bbl Marine. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. 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. Its the Holley Pro Jection TBI mentioned by the above poster. If I am reading your post correctly you are using two separate o2 sensors when using headers ? Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. EFI Systems based on Holley's world-class Dominator and HP ECU's. Is this a viable upgrade for my boat? non biased Shelby Cobra related site! The Fora platform includes forum software by XenForo. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. Runs like a champ now. :-), I started using OMC and Volvo Penta pumps for my conversion. Price Point: $$$. Only show this user. A replacement clamp on would be an easy change out. It does not look like anything particularly superior in concept. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. Stay up to date with the latest releases, events, promotions and more. With over the transoms you might get away with it if the water is introduced at the very very end, and the O2 is mounted right at the log. Hello Chris,Ontario's boating season is about to launch for another year.Do you have any good news to add to your above article, any new marine friendly TBI products?In '08,I installed a Holley 21-700 TBI with the o2 mounted in the manifold to Holly specs. I want to register an account for free right now! Part# 550-511. Below are the most common sensor usages in a Holley EFI system, however pressure transducers can be applied to any form of pressure in an automotive system, from oil pressure, to exhaust back pressure, and the data gathering usages in racing can get quite creative. EFI is the wave of the future. Thanks for the compliment--we look forward to your feedback! May 19, 2021. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. O2 sensors are water proof. Maybe my manifolds leaked the inside between the snail and the log?? Why? . #1. . The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! Thanks for the heads up. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. looking at doing the same. The fuel pump question is the tough one. There was a 1.5 point difference in afr between banks. I hope that the next F/2F header is more O2 sensor friendly. Thanks guys. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. KAYAK searches hundreds of travel sites to help you find and book the hotel deal at O2 Hotel Taipei Main Station that suits you best. That sounds like one solution. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. Here's the pic of the location with my header. Most of you only need to tune 4 points, idling around the marina, part throttle - pulling the rope tight, 1/2-3/4 throttle - cruise, and YeeHaa - WOT. 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. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. FWIW, I called Holley to confirm the part number and they say the Bosch part number if 17212 (also available on Amazon for $64.78). From there, our highly trained factory refurbish technicians flow the original fuel injectors. Affiliate. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. I installed a holley sniper kit. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For a better experience, please enable JavaScript in your browser before proceeding. I purchased the Holley HP MPFI system and went to the lake with it. Did you use the Holley fuel pump and have you had any issues with it? May 1, 2018 They want you to angle it to keep it from fouling. Emissions. Free ground shipping regardless of order size! Capability Range: Advanced I have a 74 bronco, 302, mild cam. PS, Once someone has a good 270/350 tune, everyone can use it. They are about 4 inches long, in-line between the log and manifold. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. 2 Reviews. I just discovered that was the case with my Fitech. It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt. Mark Twain, The goal in life: To die young as late as possible. so simple check first, whats the fuel pressure?