Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. blue doberman puppies. Copyright 2022 Holley Performance Products, Inc. All right reserved. Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. Stay up to date with the latest releases, events, promotions and more. So please, If you have problems registering or can't log into your account, please. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. If you have long tube headers, mount the sensor approximately 6-10" after the collector. 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. If you're thinking that you've read everything above and are ready to toss the carb on your marine engine then take this handy quiz to make sure! It may not display this or other websites correctly. Other countries likely have simmilar approval processes for marine engines. Here is one on start up tuning. Specs. Is Holley working on a complete marine package or planning to in the future? Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery. Sniper EFI 4bbl Marine. They are about 4 inches long, in-line between the log and manifold. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. 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? If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. I'll let you know how it works out. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. Then if that doesn't work call the tech line they are great! 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. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. If you have a manual tranny starting off without squealing the tires can be tricky because all four barrels open up at the same time. 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. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. Full time feedback from the sensor is what the computer uses to refine the fuel table. All sensors are tested to ensure they accurately report critical engine data to the . 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). The first option is to just buy the injector body and the controller with the wiring harness and sensors. For a better experience, please enable JavaScript in your browser before proceeding. Look at the bottom.. Yellow Cold! PS, Once someone has a good 270/350 tune, everyone can use it. 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. Stay up to date with the latest releases, events, promotions and more. My boat is still in winter storage. The bottom line is that trying to run EFI on a marine engine is not something you can do as an afterthought. I've dunked mine lots of times. They have been working out well for a few years now. Make sure to put anti seize on the threads. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! Homemade body parts replace the originals as they rot away but it's a 40 on the inside. 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. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. I know from some of the other posts, there have been WBO2 sensor issues. 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. Price Point: $$$. Be sure to disable autotune and remove the O2 sensor before it dies. Holley Sniper EFI Wideband Oxygen Sensor Part Number: 510-554-155 Click image to zoom $125.99 More than 10 available Lowest Price Guarantee Sniper EFI Wideband Oxygen Sensor Replacement Part for Holley Sniper EFI and Terminator X Systems Bosch LSU 4.9 See more product details Free Shipping - Ships Today QTY Add To Cart Add to Wish List The Sniper needs a "clean" 12V wire that is hot in Start and Run. 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. Miami, FL. I also capped off the regulated return line with a hose, clamps, and chamfering bit. 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. Emissions. It's a compact HP pump and cooler assembly. Just a rumor. pull the sensor out of the exhaust. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. 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. Here's the pic of the location with my header. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. O2 sensor placement is critical for getting your engine to read the oxygen in the exhaust correctly and can directly impact the performance of your new EFI installation. ), 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. Phil is right. Runs like a champ now. I found this in the instruction manual for the older commander 950 system. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Capability Range: Advanced The first thing to consider here (if you are in the USA) is US Coast Guard (USCG) Safety Approval. Are you holding your RPMs back with the MSD for some reason? Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. My first install was on a stock manifold and I installed it in about the same spot Steamer (above) did, except 180 degrees the other way, facing towards the front of the vehicle. I was mocking it up at the time. Wideband Oxygen Sensor Extension Cable. QFI-500 Oxygen Sensor. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. In the case of the car, you can generally get out and walk (run?) Could show a lean condition when in fact it really isn't. JavaScript is disabled. Your BluePrint Engine will be equipped with a Holley model 550-510, or 550-511 (identical except for finish color) on 4150 flanged intake manifolds. To close this one out, below is a photo of where I installed the O2 bung. In this case, the prime shot is good for cold, but too much for warm. Find a lower price anywhere and we'll beat it by 5%! Welcome to ClassicBroncos! You are using an out of date browser. Idle and off-idle performance (particularly as the engine goes into gear.) Menu. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. Has anyone run an O2 sensor in an EFI on a marine engine? 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. Wondering how you are progressing with this? No prime, but a second later it's ready to crank 'normally'. Capability Range: Professional 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. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? Come join the discussion about offshore racing, performance, modifications, builds, classifieds, troubleshooting, maintenance, and more! Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. I don't have enough experience with marine applications to know exactly what it will take to solve this. Plug-And-Play Compatible with Holley Sniper EFI System, Only for applications that use a Bosch LSU 4.9 0 258 017 025 (17025) Wideband O2 Sensor, Particulates, carbon (e.g. Holley's self learning system is a blessing and a curse. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Followed all the instructions to the letter. Tune the delay relay timing to just miss the prime shot.For cold starts, a simple push-button or switch "choke" override to power the relay during prime would provide it. I was thinking aluminum heads would run it up closer to 5,000 rpm. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: The throttle body has a built in fuel pressure regulator set at 58.5 psi. . 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 took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. Capability Range: Professional I have a 74 bronco, 302, mild cam. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. This page was generated at 08:35 AM. I installed a holley sniper kit. You'll also notice that the firing order is 1-6-5-4-3-2. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. 10 min read Video. Running? 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. 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. If you're not running one (or if you are and the water has killed it) then it is not surprising that you are running rich. A 90-degree V-6 has three shared crankpins set 120 degrees apart. Bolt-on carburetor style EFI for your classic car or truck. The spark must be manually tuned. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. I have a 74 bronco, 302, mild cam. Sniper EFI 2300 Marine. the engine not running. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. From time to time we receive phone calls from individuals who are interested in converting their carbureted boat motor to fuel injection. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Greatest struggle is the shift interrupt. From there, our highly trained factory refurbish technicians flow the original fuel injectors. Other than the constraints provided in the article above I see no reason why this wouldn't be a great upgrade. Initial Calibration in Basic Configuration. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Bolt on 4150 Flange Carburetor Replacement. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Add To Cart. Some parts are not legal for use in California or other states with similar regulations. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. 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. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Follow USCG rules about materials and fittings. Holley EFI Oxygen Sensor. Im almost at your exact same setup on a Redline 460/Berkeley pump but waiting to pull the trigger on the Sniper until I can pinpoint exactly where I can install the o2 sensor without the wet exhaust damaging it. What exhausts are the best? Each engine has the Holley marine 2 barrel carburetor. Its the Holley Pro Jection TBI mentioned by the above poster. Holley Sniper EFI Self-Tuning Kit - Shiny Finish, Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish, Holley Sniper EFI Self-Tuning Kit - Classic Gold Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Black Ceramic Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Classic Gold Finish. Categories. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . I am considering the Daytona Sensors Ignition module. Not always the case with a boat. So far so good. Systems that were already designed for marine efi. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. I installed one also on mercruiser 260 hp. Replacement Sniper and Terminator X O2 Sensor. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? I have a boat with twin 3.7 Mercruisers. There is no problem getting this tuned and then running open loop. The Tech Tips and discussions are also great! Seems to have more low end tq and is much smoother power through out the rpm range. Sniper EFI 4bbl Marine. Who knows. My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. Product Q&A . If this could be disabled it would be much better. 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. Part# 554-155. holley efi. (REGISTERED USERS DO NOT SEE THIS POST/AD! . 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. functioning controller during engine operation. Currently has 2 bbl carburetor and mechanical distributor, mechanical fuel pump for 165hp. 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. If you call, they usually let you put in your name and they get back to you. Douglas Cline. Holley EFI Oxygen Sensor. The clamp-on that came with mine wasnt a good fit on my 2" pipe. I have not yet got it figured out. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. Anti-Seize pre-applied to sensor threads. Followed all the instructions to the letter. I installed a holley sniper kit. $5 Off Your $100 Mobile App Purchase . Thanks guys. Without Headers Steamers location (above) is perfect, up close to the engine where you . Staff Writer. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. 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 completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. If you find that please let us know. Apr 13, 2017. with the extension. It flows 850 cfm and can support up to 650 horsepower. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. Sniper EFI Installation Guide. 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. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. Part# 50-5009QFT. Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. 2 Reviews. I had the pink ecu signal wire connected to a bullet connector on the passenger side . One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . I installed a holley sniper kit. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. . Replaced O2 sensor but continued to have AFR issues running too rich. Super helpful and knowledgeable. I did--- Save your money and piece a fuel it together. When it did keep running, the headers all started to smoke. EFI Systems based on Holley's world-class Dominator and HP ECU's. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. The new Exhaust manifolds will have wideband O2 bungs for tuning. 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. I will keep the replacements as spares. I have not gone back in to try to fine tune them. MAP Sensors. 2. 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. 74 FJ40 confined to the swamp. Shop Oxygen Sensors at Summit Racing. No matter what I do, it will not start. I recently installed the sniper setup on my stock 71 duster 340 4 speed. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. Are you running the latest software? Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. As far as a sensor goes, absolutely nothing. 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. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. Add to Cart . When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Add to Cart . Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. 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. What is your fuel pressure at the carb during crank? I have searched thru the forum as much as I can, with not much luck. AFR was 19 area. You must log in or register to reply here. Not sure how well the sensor likes being that close to the port. Also some tips on preventing O2 sensor damage Now the lower cost Holley Sniper advertised for March 31 2016. 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. Add to Cart . Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. Sniper EFI 2300 Marine. The engine floods and it is embarrassing when leaving a lock. excessively rich mixtures), Mechanical shock (e.g. It will flood itself out and won't start back, just crank and crank. 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. Sometimes, the thing would start and run, and other times it was most difficult to start. 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. 5. quick fuel. May God's grace bless you in the Lord Jesus Christ. Put an end to cold start issues, hesitations, vapor . 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 . Tech Resources. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Specs. It will crank and run great for 2-15 seconds then die. Waiting for spring to put back together. Good luck to all. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. Also the progressive link. When either of these operating temperature ranges is exceeded, the sensor can no longer be . Holley recommends a 3/8" fuel supply line. Dec 28, 2016. I hope that the next F/2F header is more O2 sensor friendly. Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. Seems to LEARN much faster than the Fitech did. Capability Range: Advanced Well an update on the Sniper install. After discussing it in this thread and talking with Holley's tech support, I decided . The in tank pump is quieter, will normally run cooler and should last longer. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. $132.95. 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.). We also use content and scripts from third parties that may use tracking technologies. Holley Sniper EFI Wideband Oxygen Sensor. Spray a rag down pretty good with brake cleaner. #1. 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. If you let it cool down again, does it start up fine? 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. Was in marine engineering for years. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. . Add to Cart . 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. Note the temperature sensor mounted on the back of the driver side head in the above photo. Jan 20, 2019. Advanced throttle body injection systems capable of transmission control and more. Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. There was a 1.5 point difference in afr between banks. so far so good love the smooth power and easy starts. What Is Pinion Offset, And How Does That Affect You? 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. Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. The wide band O2 sensor is required for initial running and calibration. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. The light shines in the darkness, and the darkness has not overcome it. But you still risk a little water running back at low Rs. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. Wideband Oxygen Sensor Extension Cable. I have tried several different settings to get it going, no luck. 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. Aftermarket headers are pretty much the only safe way to run an O2 sensor. 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. Installed the sniper/MSD combo on my mildly built 460 KEM. Holley sent him a new one for free. Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after For a better experience, please enable JavaScript in your browser before proceeding. If I am reading your post correctly you are using two separate o2 sensors when using headers ? Thanks for the feedback on this adapter, Donald. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. See Details. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Fuel economy went from 12.5 to 13.5 gph to 10 gph. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? I would send an Email to Chris at EFIsystempro. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? holley efi. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Still needs a EFI pump and return line. Holley Sniper O2 sensor replacement. On my system, I machined in the O2 sensor right between the snail and the manifold of a . I will get a new 02 sensor before I swap back to the orange box. Late to the party but here's where mine are installed. 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. 2014 FJ Cruiser - White - 4X4 - Loaded - . Then if you are do you just wire the o2 sensors in parallel or do these EFI kits have inputs for more than one sensor. This was for MPFI. 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. It works great where its at. Other? While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Fortunately, it turns out there are some options. The target A/F value based on load or MAF cfm, and engine speed. Sniper EFI Releases new Stealth 4150 Models! . Bolt-on carburetor style EFI for your classic car or truck. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. In order for it to work as designed the O2 sensor has to be installed in a dry exhaust system and needs to be placed 1-10in from the collector in the headers. Sorry for the late reply. I just discovered that was the case with my Fitech. A replacement clamp on would be an easy change out. Holley Sniper EFI Oxygen Sensors 554-155 Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. Bolt-on carburetor style EFI for your classic car or truck. looking at doing the same. . 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. 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.
