Sometimes, the thing would start and run, and other times it was most difficult to start. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. Jun 7, 2021. #1. . One example of a direction could be an adjustable timed delay-on injector-power relay in the injector power feed wire, delaying 1-second after key-on or whatever is necessary to bypass the prime shot time, only. The test run was great, they have never run so well even when they were new with carbs. Found out that it was due to rfi/emi. I wanted to let you all know, I have modified a mercruiser Cool Fuel Gen 3 module(mounted on the engine) to provide fuel to a sniper. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. Capability Range: Professional He had one there that was run on a dyno then the fuel map was set and shipped back. JavaScript is disabled. If this is a first time effort, find a tuner in your area with marine experience. Attempted to make a parts run in my 1990 Third gen Chevy Camaro with a small block chevy 350 with flowmaster mufflers.I believed the issue in this video to b. For now I have a genuine bosch O2 and Standard Automotive TPS installed. Everything is included to completely plumb your fuel system including; 20 feet of 3/8" EFI Hose, in-line fuel pump, post and pre fuel filters, return bulkhead, and all of the necessary fittings and hardware. Look at the bottom.. Well an update on the Sniper install. The Sniper EFI throttle-body drops in place of your . As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. For gourmands, night markets not only offer scrumptious small . 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. Late to the party but here's where mine are installed. Holley recommends a 3/8" fuel supply line. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. 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 was mocking it up at the time. Followed all the instructions to the letter. Part # HM206. Thinking about this I think this will work very fine! Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. I tried holley tech support, no answer and put on hold for hours. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Holley Oxygen Sensor O2 Bung Weld-In Style; Larger Image. Spray a rag down pretty good with brake cleaner. Not sure how well the sensor likes being that close to the port. 534-199. I received my replacement TPS and O2 sensor. . Price Point: $$$. Capability Range: Advanced the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. All of the wiring begins at the throttle body and connects outward from there. And the relay and fuse were mounted along the firewall. $132.95. 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. That's great--we look forward to your results! This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. $43 per night (Latest starting price for this hotel). Installed the sniper/MSD combo on my mildly built 460 KEM. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: 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. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. I thought about adding some sort of extra protection but never did. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. 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.) But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. p.s. You are using an out of date browser. Emissions. 5. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. the engine not running. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. #1. Maybe going all the way to the front is the way to go? Running? Categories. It is possible for the ECU to have an internal failure that can kill O2 sensors. See Details. I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? 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. I really dont want any issues on the whitewater lol Apr 13, 2017. with the extension. I recommend popping for the Master . I'm about to embark on the same type of project. Replaced O2 sensor but continued to have AFR issues running too rich. Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. . But you have to get it tuned. Doesn't look like it will have an O2 sensor. Advertising . 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. The O2 sensor burned out immediately. dropping a sensor on the ground), Extreme exhaust temperatures (Greater than 930 degC/1700 degF), Unheated sensor in exhaust stream. What motor is this on? so mine has been pretty good but 1 out 20 starts you can hear the fuel pump run longer then normal..when it does that it will light off then diebut if i put my foot to the floor it will start..still working on that 1..timing i am running 12 cranking.20 idle.40 cruze.35 wotstill playing with all of this..Mine is also a sniper stealth. Having the same problem with my sniper as well, intermittent hot (and cold) start issues. I am a competent mechanic and I have checked all the usual suspect items. 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. Given the traditionally poor fuel economy of carbureted marine engines, we feel your pain. Prime cannot be adjusted on this old unit. Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. . I myself will convert my 2 302's (Volvo Penta 5.0 l AQ231A) from carbs to EFI; I must find out everything before I start work on the engines, then I am satisfied to start. Thanks for the compliment--we look forward to your feedback! It turns out that the loading generated a propeller in the water is significantly different than wheels on pavement, so much so that the map has to be tuned differently. Without the engine running, AFR will read 35.6 The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. Sniper EFI Releases new Stealth 4150 Models! Specs. This Video Shows Ideal O2 Sensor Placement! Will I be able to run both systems off of one fuel pump? The very front would be the safest place. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. I have not had it on the dyno with the sniper, but would guess probably about 400 to 410 hp and well over 500 tq.I did use the holley pump that came with the sniper. For the most part each engine wants a bit of its own timing set-up IMHO, you boat owners with a 270HP 350 (or any other config) may want 350HP but upgrading it to that level will reduce or eliminate reliability. I've dunked mine lots of times. Part # 554-155. This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. And who can blame them? http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. Bolt-on carburetor style EFI for your classic car or truck. After discussing it in this thread and talking with Holley's tech support, I decided . Even though you now have the USCG-approved Sniper EFI System as an option for your new EFI System you're not quite out of the woods yet. so far so good love the smooth power and easy starts. Free ground shipping regardless of order size! Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. Sep 14, 2021. 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. 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. THen you have to determine if you want 02 readings from one cylinder, or in the case you just mentioned mostly one cylinder, average of 4 cylinders on one bank or the other, or average of all 8 cylinders. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. excessively rich mixtures), Mechanical shock (e.g. On EFI systems such as Holley's Sniper, all of the EFI sensors (except for the O2 and coolant temperature sender) are mounted snuggly in the throttle body. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. 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. About your only location is in that short area from the log to the port face. Holley Sniper EFI Oxygen Sensors 554-155 Much of the system is encased right inside the throttle bodyand that includes the ECU. I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. 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. Super helpful and knowledgeable. EFI EFI kit electronic fuel injection. Followed all the instructions to the letter. I have also picked up another .5 gallons per hr to about 9.25 gph. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. But this also makes me wonder what you did for the O2 sensor. Then they had it repaired and back to me in 5 business days. It's fast, simple and absolutely free. As always, your results may vary and batteries not included. Capability Range: Advanced Sent unit back to Holley. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Maybe this one has a shorter cable? Phil is right. It will flood itself out and won't start back, just crank and crank. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. . I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. 02/25/2020. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. According to AEM Electronics, a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: 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. EFI Systems based on Holley's world-class Dominator and HP ECU's. Hopefully this one lasts longer than the original. A forum community dedicated to performance boat owners and enthusiasts. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. The engines are rated at 170 hp each. Do you offer a USCG fuel pump kit? It works fine. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. In Stock. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. I will be starting mine up this month, I hope it goes well, good luck to you. Thanks again for writing! 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. Aug 17, 2013. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. You must log in or register to reply here. 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. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. So much it could be. Sniper EFI Quadrajet Marine. It flows 850 cfm and can support up to 650 horsepower. The in tank pump is quieter, will normally run cooler and should last longer. ), 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. Holley EFI Oxygen Sensor. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Holley EFI. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. Add To Cart. The engine floods and it is embarrassing when leaving a lock. HP comes from torque and rpm and rpm breaks things and increases wear. The truck started fine after install, and ran down the road ok. I have a boat with twin 3.7 Mercruisers. 29. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . He also explains how to properly install them. I want to register an account for free right now! 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. Then if that doesn't work call the tech line they are great! Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. I will be calling around to see if I can find someone to help that has experience. 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. Innovate Motorsports HBX-1 Bung Extender. But it is going to be a little tricky. So there is at least some probability of success. The O2 sensor burned out immediately. Yes, this is going to be an added expense, however, it will help guarantee your success. I have a 74 bronco, 302, mild cam. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! It's hallmark is its simplicity--but in this case it is also it's shortcoming. 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. So please, If you have problems registering or can't log into your account, please. Advanced throttle body injection systems capable of transmission control and more. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Here's the pic of the location with my header. . . Got a picture? 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. A third option would be to run your EFI system without an O2 sensor at all. 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. Bolt-on carburetor style EFI for your classic car or truck. Everyone else was backordered several months. Then having an experienced tech from a local dyno speed shop ride in the boat as you run the power up and down, making notes. 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. Sniper EFI 2300 Marine. Master ASE tech since 91. Staff Writer. The clamp-on that came with mine wasnt a good fit on my 2" pipe. Not always the case with a boat. 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. 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. The World's largest 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. There was a 1.5 point difference in afr between banks. Why? test the sensor.. for a basic pass/fail of the sensor. With a bad TPS you will have to manually prime to try and get it . It's a compact HP pump and cooler assembly. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. Have to replace head gasket. It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. 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)? 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. 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.). Initial Calibration in Basic Configuration. This is great information that can only get you closer to an ideal solution. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. I've seen O2 sensors in water jacketed headers that have worked fine for years. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. The wide band O2 sensor is required for initial running and calibration. 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. 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. 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. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. Anti-Seize pre-applied to sensor threads. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. One of the benefits of using any Holley EFI system is that it self learns and tunes on its own. 02 sensors are very heat sensitive, and can detect an exhaust pulsation in a single Header tube, that's why we always wanted to position the sensor into at least 2 opposite firing tubes we running Headers. The wiring was a bit of a mess. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). 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. Let me know how I can be of assistance. 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. Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. Conditions when closed loop o2 should be turned off. The target A/F value based on load or MAF cfm, and engine speed. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. This doesn't mean it can't be done. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. Anything else is going to be a frustrating recipe for for failure. I think I could run more boost but it's a real hand full right now. Purely coincidence about the '2300' number. Sniper EFI 4500 Marine. The spark must be manually tuned. This is the 02 sensor adapter I used. Also some tips on preventing O2 sensor damage I think installing a wide band O2 sensor in the manifold(s) is a great idea. You must log in or register to reply here. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after The adapter plate installs in between the exhaust manifold and the riser/elbow allowing for the water jackets to still be in place and an o2 sensor to be installed in the still dry exhaust gasses. Advanced throttle body injection systems capable of transmission control and more. Brand: Holley EFI Emission Code: 5: Material: . I know from some of the other posts, there have been WBO2 sensor issues. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. They are the only ones got me a holley usb to can cable fast.
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