So I bought the progressive linkage but you then have . They have been working out well for a few years now. So please, If you have problems registering or can't log into your account, please. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Next, the new unit was installed onto the manifold. I installed a holley sniper kit. 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.. The spark must be manually tuned. 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. Replaced O2 sensor but continued to have AFR issues running too rich. I installed the adapter and elbow so it's at an angle above the entry point. If you have long tube headers, mount the sensor approximately 6-10" after the collector. 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. Can more detail be provided? You can selectively provide your consent below to allow such third party embeds. This is great information that can only get you closer to an ideal solution. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. The wide band O2 sensor is required for initial running and calibration. Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. It could be an instant fix. Description. 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. Still needs a EFI pump and return line. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. 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. Plug into the coolant temperature sensor. Idle and off-idle performance (particularly as the engine goes into gear.) Part # 554-155. Is this a good upgrade? 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. In order to do this, it heavily relies on proper O2 sensor placement. Q3. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. This runs in the area of $1000 and has everything you need for a basic install on almost any vehicle equipped with a four barrel carb. Tech Resources. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. Do you recommend in-tank or external fuel pump? CUSTOM ART FOR CUSTOM NEEDS. As far as a sensor goes, absolutely nothing. The wiring was a bit of a mess. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . I was thinking aluminum heads would run it up closer to 5,000 rpm. : For registered members this ad will NOT show. Holley Oxygen Sensor O2 Bung Weld-In Style; Larger Image. The adapter does require the removal of the manifold and some machining but it allows the O2 sensor to be placed into the exhaust flow but protects it from the water exiting the block. To take advantage of all the site features, please take a moment to register. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. The first option is to just buy the injector body and the controller with the wiring harness and sensors. There was a 1.5 point difference in afr between banks. - You are currently viewing the forums as a GUEST. I have not yet got it figured out. By Joshua C on August 10, 2021 | Verified Owner, Worked right out of the box. I had the pink ecu signal wire connected to a bullet connector on the passenger side . Well an update on the Sniper install. Once the tune is complete, the O2 sensor can be defeated or . Sniper EFI 4500 Marine. 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. Pay close attention to the instructions on O2 sensor placement. The target A/F value based on load or MAF cfm, and engine speed. Seems to have more low end tq and is much smoother power through out the rpm range. Holley EFI Oxygen Sensor. Other countries likely have simmilar approval processes for marine engines. 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. Register now for free!) If I am reading your post correctly you are using two separate o2 sensors when using headers ? I know from some of the other posts, there have been WBO2 sensor issues. Much of the system is encased right inside the throttle bodyand that includes the ECU. Will I be able to control my ignition timing with the Sniper? Price Point: $, Advanced throttle body injection systems capable of transmission control and more. So much it could be. Holley EFI has the solutions you need to get your project up and running better than ever! The Sniper will do that. The engines are rated at 170 hp each. The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! 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.). the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. It will flood itself out and won't start back, just crank and crank. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. $108.95. The engine RPM when closed loop o2 will begin. I installed a holley sniper kit. Is Holley working on a complete marine package or planning to in the future? B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. 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. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? I have a 74 bronco, 302, mild cam. Enter The 2023 LS Fest West Trip Sweepstakes Today And Join Us In Las Vegas! For a better experience, please enable JavaScript in your browser before proceeding. 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. Currently has 2 bbl carburetor and mechanical distributor, mechanical fuel pump for 165hp. Did you use the Holley fuel pump and have you had any issues with it? quick fuel. Use a return fuel line. What is your fuel pressure at the carb during crank? From there, the idea is that it will self-tune to the requirements of the engine. I think I could run more boost but it's a real hand full right now. Any word on this? From there, our highly trained factory refurbish technicians flow the original fuel injectors. PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. 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. Capability Range: Professional Good luck to all. Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Your talking flames at that point, and it will definitely have an effect on the reading. Phil said water would still get up over the snail and knock out the sensor. It doesn't even mean that you can't do it. I will be calling around to see if I can find someone to help that has experience. EFI is the wave of the future. Add to Cart . Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. EFI Systems based on Holley's world-class Dominator and HP ECU's. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. I was mocking it up at the time. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. The truck started fine after install, and ran down the road ok. 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. Bolt-on carburetor style EFI for your classic car or truck. away. Sadly, no. 1985 fj60 (sold back to Toyota), 1997 fzj80, 1971 fj40 with 75 2F. 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. Thanks for that, Danny. 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. Capability Range: Advanced If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. Holley Sniper O2 sensor replacement. 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. It appears that its a tuning issue. Capability Range: Advanced Newer ECMs have all the options to configure these functions. It works great where its at. . You shouldn't feel too bad about that lack of knowledge, because many boat owners either don't realize that the moisture present in their wet exhaust manifold will kill the wideband O2 sensor required by an EFI system. Bolt on 4150 Flange Carburetor Replacement. A forum community dedicated to performance boat owners and enthusiasts. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. 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 particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? Install the throttle linkage to the Sniper EFI throttle body. Holley EFI Usb/Can Harness, Sniper Tbi. 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. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Fortunately, it turns out there are some options. This Video Shows Ideal O2 Sensor Placement! 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. 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 have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. Since your existing low-pressure fuel system is not going to work with the Sniper EFI System this puts you in the unenviable position of choosing between USCG compliance or EFI. My bet based on longer pump run, to make pressure, you have a leaking injector. You'll also notice that the firing order is 1-6-5-4-3-2. http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. I recently installed the sniper setup on my stock 71 duster 340 4 speed. This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! 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. He knows his stuff, gets back quickly to you, etc. Holley EFI Oxygen Sensor. 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. My question is concerning what happens a year later, when I have a top-end swap . O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. 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. Waiting for spring to put back together. He also explains how to properly install them. Sent unit back to Holley. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. The truck started fine after install, and ran down the road ok. Replaced and gapped to .45 all spark plugs. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. Yes, this is an old thread, but it's an old unit. 2 Reviews. A 90-degree V-6 has three shared crankpins set 120 degrees apart. well I have installed the Sniper on my 460 KEM (Ford) marine motor. O2 sensors are water proof. 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. Price Point: $$$. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Douglas Cline. 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. Capability Range: Moderate Bosch 17025 Oxygen Sensor #1 Best Seller . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 29. 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. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. 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. . 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? 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. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. . Holley Sniper EFI Wideband Oxygen Sensor. Sniper EFI 4bbl Marine. QFI-500 Oxygen Sensor. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. I have tried several different settings to get it going, no luck. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. I have not gone back in to try to fine tune them. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Holley part number 554-155. It is possible for the ECU to have an internal failure that can kill O2 sensors. Thanks for the feedback on this adapter, Donald. 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. The ones in the Bosch box come without warranty. The Sniper EFI throttle-body drops in place of your . Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. 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. 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. Are you running the latest software? Here is one on start up tuning. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. 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. I'll let you know how it works out. YES! The World's largest the engine not running. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. Free ground shipping regardless of order size! 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. Holley EFI has the solutions you need to get your project up and running better than ever! My hand is holding the connector to the sensor. I want to register an account for free right now! Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. I installed a holley sniper kit. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. 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. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). The new throttle response was significant,fuel saving and gave me a turn key cold start.Still I can't have an idle speed under load and a turn key warm start. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . So far so good. 4. But you still risk a little water running back at low Rs. But this also makes me wonder what you did for the O2 sensor. For the most part, the small harness is plug-and-play. I had questions on the suggested "Marine O2 Sensor Adapter" from Howell EFI (https://howellefi.com/product/adaptor-o2-sensor-for-marine-use/), but when I look to the pictures, I understand how it will work. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. No matter what I do, it will not start. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Do you offer a USCG fuel pump kit? 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. Maybe this one has a shorter cable? It will crank and run great for 2-15 seconds then die. Holley EFI. That is defacto step one in trouble shooting fuel injection systems. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Free ground shipping regardless of order size! I want to register an account for free right now! 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). Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. Sort. Add To Cart. Affiliate. 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. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. 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. But it is going to be a little tricky. 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. The fuel pump question is the tough one. . Also the progressive link. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. I think installing a wide band O2 sensor in the manifold(s) is a great idea. excessively rich mixtures), Mechanical shock (e.g. 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. 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. Some parts are not legal for use in California or other states with similar regulations. Thanks for the heads up. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. There can be leftover debris from manufacturing that have been washed down and are now clogging one. It flows 850 cfm and can support up to 650 horsepower. Bolt-on carburetor style EFI for your classic car or truck. Only a few hours on the motor but so far so good. Followed all the instructions to the letter. Will I be able to run both systems off of one fuel pump? Brand: Holley EFI Emission Code: 4 . 534-199. HP comes from torque and rpm and rpm breaks things and increases wear. Fuel economy went from 12.5 to 13.5 gph to 10 gph. Sniper EFI 4bbl Marine. 3. To close this one out, below is a photo of where I installed the O2 bung. 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. We use cookies to enhance your experience while using our website. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. EFI EFI kit electronic fuel injection. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. Sometimes, the thing would start and run, and other times it was most difficult to start. This really applies to any O2 sensor regardless of EFI system. Sensors that are installed in an exhaust must be connected to a properly Yellow Init In First shown for an instant when the system is powered on. The ones in the Bosch box come without warranty. 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.
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