#3. 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. 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. 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. I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. So far so good. RPM going up and down , miss firing and backfiring. This was for MPFI. quick fuel. 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 have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. : For registered members this ad will NOT show. The opposing pistons share a crankpin the way they do in a V-8, but the fact that there are only three cylinders on each bank means that the plugs fire at 90-150-90-150-90-150 intervals. 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. 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. Aftermarket headers are pretty much the only safe way to run an O2 sensor. Phil is right. I hope that the next F/2F header is more O2 sensor friendly. Can more detail be provided? No worse than taking the reading in the intake manifold cross over. Are you running the latest software? Sniper EFI Installation Guide. Brand: Holley EFI Emission Code: 4 . - You are currently viewing the forums as a GUEST. 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. the Hamilton 212 pump is maxed out at about 4600 rpms, however it will provide about 10x the thrust that the berkly it is not as fast but haul much more load and work way better in white water. Holley Sniper O2 sensor replacement. A 90-degree V-6 has three shared crankpins set 120 degrees apart. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. 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. Welcome to Club Cobra! Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. This Video Shows Ideal O2 Sensor Placement! One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . This combines the Sniper EFI Self Learning Throttle Body, with an easy to install In-Tank Retrofit Returnless Module, 20 ft of Earl's Vapor Guard Fuel Hose, and the required fittings. The Holley Super Sniper High Performance EFI kit comes with a coolant temperature sensor and an O2 sensor, both of which must be used for the EFI to work properly. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. It will crank and run great for 2-15 seconds then die. Only show this user. They are the only ones got me a holley usb to can cable fast. I had an injector fail after a month of running and called the tech line who helped me figure that out. The in tank pump is quieter, will normally run cooler and should last longer. 74 FJ40 confined to the swamp. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. $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. For the most part, the small harness is plug-and-play. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. Register now for free!) Full time feedback from the sensor is what the computer uses to refine the fuel table. 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. I am just now ready to do the tuning this weekend. To take advantage of all the site features, please take a moment to register. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. From there, our highly trained factory refurbish technicians flow the original fuel injectors. :-), I started using OMC and Volvo Penta pumps for my conversion. This really applies to any O2 sensor regardless of EFI system. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. Yes, this is going to be an added expense, however, it will help guarantee your success. Visit their website for more details. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. 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. Any exhaust down at engine level or lower will definitely get at LEAST some steam. Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish. Fortunately, it turns out there are some options. The very front would be the safest place. I have searched thru the forum as much as I can, with not much luck. 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. *Possible delays due to Covid-19 click for more information. Followed all the instructions to the letter. It just means that if you are thinking you'll install this, crank it, and pull away from the dock with complete success you might be in for some disappointment. The Sniper will do that. Holley EFI. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. Holley recommends a 3/8" fuel supply line. Also the progressive link. Jan 20, 2019. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. Items 1 - 21 of 21 Items. $102.95. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Capability Range: Moderate Followed all the instructions to the letter. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? We use cookies to enhance your experience while using our website. The ones in the Bosch box come without warranty. Replacement Sniper and Terminator X O2 Sensor. By Joshua C on August 10, 2021 | Verified Owner, Worked right out of the box. 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. I have searched thru the forum as much as I can, with not much luck. Any word on this? Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. 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. Be sure to disable autotune and remove the O2 sensor before it dies. 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). Yes, this is an old thread, but it's an old unit. I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. Phil said water would still get up over the snail and knock out the sensor. 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. I'm using the NTK sensor. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Capability Range: Advanced Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Part# 50-5009QFT. The Tech Tips and discussions are also great! There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. It will flood itself out and won't start back, just crank and crank. Running? In the case of the car, you can generally get out and walk (run?) I want to register an account for free right now! Price Point: $$$. Maybe this one has a shorter cable? Features: . Not always the case with a boat. Pay close attention to the instructions on O2 sensor placement. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Not sure how well the sensor likes being that close to the port. (REGISTERED USERS DO NOT SEE THIS POST/AD! Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. 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 . Then operate open loop with a fuel map\Timing curve.I am interested in the capabilities of the Sniper product (4 injector) in a Marine application.. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. Sorry for the late reply, Douglas. But MAP sensors are very easy to physically implement and are inexpensive. I was thinking aluminum heads would run it up closer to 5,000 rpm. MAP Sensors. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. 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. Sniper EFI Releases new Stealth 4150 Models! Holley EFI requires several pressure inputs in order to run an engine. After discussing it in this thread and talking with Holley's tech support, I decided . Given the traditionally poor fuel economy of carbureted marine engines, we feel your pain. EFI is the wave of the future. 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). 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. This is great information that can only get you closer to an ideal solution. I will get a new 02 sensor before I swap back to the orange box. Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. test the sensor.. for a basic pass/fail of the sensor. Since the Sniper install, I encountered my second O2 sensor failure so I thought I would try the "Innovate Bung Extender" recommended by a few folks here. Advanced throttle body injection systems capable of transmission control and more. Bolt-on carburetor style EFI for your classic car or truck. Holley Sniper EFI Wideband Oxygen Sensor. You must log in or register to reply here. Register now for free! 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. CTS (Coolant Temperature Sensor) - Reads engine temperature. Prime cannot be adjusted on this old unit. I will be calling around to see if I can find someone to help that has experience. The problem occurs when an excessive amount of oxygen makes its way from the intake port directly into the exhaust at idle and low engine speeds because of overlap. Vega$69. The fuel pump question is the tough one. This page was generated at 08:35 AM. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. O2 sensors are water proof. It works great where its at. I have a 74 bronco, 302, mild cam. It will not fit on round or oval risers without a suitable flat area. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. . . 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)? About your only location is in that short area from the log to the port face. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Conditions when closed loop o2 should be turned off. 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. 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. No prime, but a second later it's ready to crank 'normally'. Other than the constraints provided in the article above I see no reason why this wouldn't be a great upgrade. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. 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. I was mocking it up at the time. Sensors that are installed in an exhaust must be connected to a properly Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. Jun 7, 2021. $108.95. EFI Systems based on Holley's world-class Dominator and HP ECU's. It flows 850 cfm and can support up to 650 horsepower. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main power wires, these need to be run directly to the battery and have a solid connection. Note the temperature sensor mounted on the back of the driver side head in the above photo. the engine not running. Affiliate. I would send an Email to Chris at EFIsystempro. Have you visually verified that all your injectors are spraying? Brand: Holley EFI Emission Code: 5: Material: . Its the Holley Pro Jection TBI mentioned by the above poster. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Waiting for spring to put back together. As far as spark control, the Sniper will let you tune those 4 points, nothing else will. Super helpful and knowledgeable. Is Holley working on a complete marine package or planning to in the future? Sep 14, 2021. 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.) Put an end to cold start issues, hesitations, vapor . 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? check out the. It's fast, simple and absolutely free. 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. 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. Free ground shipping regardless of order size! Thanks for that, Danny. Part # 554-155. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! The sniper fit perfectly on the intake. Holley's self learning system is a blessing and a curse. I will keep the in-line pump for a spare. Sniper EFI 4bbl Marine. QFI-500 Oxygen Sensor. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. Has anyone run an O2 sensor in an EFI on a marine engine? The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Joe, where did you end up installing the o2 sensor on your setup? Purely coincidence about the '2300' number. The throttle body has a built in fuel pressure regulator set at 58.5 psi. I just discovered that was the case with my Fitech. But this also makes me wonder what you did for the O2 sensor. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . Do you recommend in-tank or external fuel pump? Bolt-on carburetor style EFI for your classic car or truck. John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. Only a few hours on the motor but so far so good. And the relay and fuse were mounted along the firewall. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. dropping a sensor on the ground), Extreme exhaust temperatures (Greater than 930 degC/1700 degF), Unheated sensor in exhaust stream. pull the sensor out of the exhaust. Other? Thanks for the compliment--we look forward to your feedback! Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 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. Followed all the instructions to the letter. It flows 850 cfm and can support up to 650 horsepower. Capability Range: Professional Q3. 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. 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. It is possible for the ECU to have an internal failure that can kill O2 sensors. You will still get some water on the engine side of the snails, mainly at low Rs. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. well I have installed the Sniper on my 460 KEM (Ford) marine motor. Yellow Init In First shown for an instant when the system is powered on. To simplify . What exhausts are the best? Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. The plan is to 'learn' a fuel\Timing curve with a closed loop. Copyright 2022 Holley Performance Products, Inc. All right reserved. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? 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. You'll also notice that the firing order is 1-6-5-4-3-2. Then if that doesn't work call the tech line they are great! 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. So much it could be. From time to time we receive phone calls from individuals who are interested in converting their carbureted boat motor to fuel injection. 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. I have tried several different settings to get it going, no luck. A third option would be to run your EFI system without an O2 sensor at all. Add to Cart . Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! Right now I'm just using the AEM Wideband sensor to monitor Air/Fuel ratio but hope to use it in an EFI system soon. Mine is right where Steamers is, and works well with my AFI TBI. Sniper EFI 2300 Marine. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. 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 installed several of these adaptive EFI's on cars with great success. 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. 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. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Increasing efficiency is always a good idea. Capability Range: Advanced On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. 3. If I am reading your post correctly you are using two separate o2 sensors when using headers ? 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. But it is going to be a little tricky. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. OT pipes may be out of the question, but with the water dumps put in at the transom, ala Gil or Rewarder OT pipes, you could get dry readings with bungs a little above where they bolt onto the logs, I would think.
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