02/25/2020. For now I have a genuine bosch O2 and Standard Automotive TPS installed. However, advanced tuning software is available for the Sniper EFI System that allow them to be tuned by a competent professional with experience tuning marine applications. The other thing I want to overcome is the fuel return line; my harbor master says that I can connect my fuel return line to my CAV (lucas) gasoline filter, it has 4 connection, now only 2 are used. PS, Once someone has a good 270/350 tune, everyone can use it. Aftermarket headers are pretty much the only safe way to run an O2 sensor. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Waiting for spring to put back together. 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! Yes, this is going to be an added expense, however, it will help guarantee your success. 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). 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. Holley Sniper O2 sensor replacement. #1. If the indicator reads "LOW Err" double check the connection to the CTS. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. Still trying to find more info on electronic conversion, only found Pertronix replacement for points so far.. What TBI, fuel pump, sensors and ECM computer are you using? CUSTOM ART FOR CUSTOM NEEDS. Staff Writer. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. The new Exhaust manifolds will have wideband O2 bungs for tuning. holley efi. It could be an instant fix. 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. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. If you have long tube headers, mount the sensor approximately 6-10" after the collector. . 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. Enter The 2023 LS Fest West Trip Sweepstakes Today And Join Us In Las Vegas! . Shop Oxygen Sensors at Summit Racing. 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. pull the sensor out of the exhaust. Capability Range: Advanced Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. Doesn't look like it will have an O2 sensor. 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. a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . $43 per night (Latest starting price for this hotel). I have not yet got it figured out. Other countries likely have simmilar approval processes for marine engines. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. Without Headers Steamers location (above) is perfect, up close to the engine where you . The light shines in the darkness, and the darkness has not overcome it. I have searched thru the forum as much as I can, with not much luck. AFR was 19 area. Great Article. 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. I want to register an account for free right now! Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. Your talking flames at that point, and it will definitely have an effect on the reading. Sniper EFI Quadrajet Marine. It will flood itself out and won't start back, just crank and crank. Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. 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. So far so good. 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. Add to Cart . Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. Specs. To close this one out, below is a photo of where I installed the O2 bung. PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. 5. I found this in the instruction manual for the older commander 950 system. From there, our highly trained factory refurbish technicians flow the original fuel injectors. 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. In order to do this, it heavily relies on proper O2 sensor placement. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. 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. EFI Systems based on Holley's world-class Dominator and HP ECU's. 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. Greatest struggle is the shift interrupt. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. As a follow up, I ended up using an eBay type anti fouler elbow for the O2 sensor to try and get it out of the water in the manifolds. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. We use cookies to enhance your experience while using our website. Yellow Init In First shown for an instant when the system is powered on. You are using an out of date browser. Will I be able to control my ignition timing with the Sniper? Adam. The throttle body has a built in fuel pressure regulator set at 58.5 psi. I am in the middle of a repower of twin BBC 481, mild cam which will need to be recarbureted. Car runs perfect . We also use content and scripts from third parties that may use tracking technologies. And who can blame them? It appears that its a tuning issue. Part # HM206. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. There is no problem getting this tuned and then running open loop. I recommend popping for the Master . GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! This is great information that can only get you closer to an ideal solution. The Holley Sniper system sells for $999.95, installs in under 2 hours, and requires only an O2 sensor, a temp sensor (both included), an electric return-style fuel pump, and four-wires to connect.. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . The plan is to 'learn' a fuel\Timing curve with a closed loop. The test run was great, they have never run so well even when they were new with carbs. EFI EFI kit electronic fuel injection. I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. 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. He also explains how to properly install them. 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. running holley sniper without o2 sensorplymouth township mi police scanner. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . 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. No one cares about your buddies old antiquated garden hose technology. About your only location is in that short area from the log to the port face. Phil said water would still get up over the snail and knock out the sensor. To take advantage of all the site features, please take a moment to register. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Note, that is not a crack in the exhaust manifold, just a shadow from a casting flaw. For a better experience, please enable JavaScript in your browser before proceeding. EFI EFI kit electronic fuel injection. Sniper EFI 4bbl Marine. 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. 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. This really applies to any O2 sensor regardless of EFI system. Initial Calibration in Basic Configuration. I installed it without O2 sensor, adjust on the fly. Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever! 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. Part Number: 510-554-155. This doesn't apply to race boats. I was thinking aluminum heads would run it up closer to 5,000 rpm. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. Capability Range: Moderate Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. For complete information about the cookies we use, data we collect and how we process them, please check our, actual instructions in flowcharting are represented in, Why Is Dave Blankenship Not On Oak Island Season 8, rhode island groundwater classification map. Tech Resources. 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. 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. Capability Range: Professional Is this a viable upgrade for my boat? To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. I have also picked up another .5 gallons per hr to about 9.25 gph. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. This doesn't mean it can't be done. Bolt on 4150 Flange Carburetor Replacement. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 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. 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. This motor would probably turn the berk to 6 grand and blow it out from a stop.Motor dyno'd on a carb @389 hp @ 4700rpm and 497 tq @3500. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. Ordered another dominator Bosch from Holley and it matches perfect. 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. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. 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. In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Some logs have water up to just short of the port. If you are not running the latest software stop guessing and go download it. Add to Cart . This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Anti-Seize pre-applied to sensor threads. Are you holding your RPMs back with the MSD for some reason? Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Find a lower price anywhere and we'll beat it by 5%! Sort. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. I installed a holley sniper kit. Seems to have more low end tq and is much smoother power through out the rpm range. 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. The O2 sensor burned out immediately. Sniper EFI Releases new Stealth 4150 Models! Can anyone share their experiences with this type of setup? Put an end to cold start issues, hesitations, vapor . Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! Good luck to all. If this is a first time effort, find a tuner in your area with marine experience. Fortunately, it turns out there are some options. There are drawbacks to that (as your tuner can explain in more detail) but it is doable, provided the system is correctly tuned initially. Has anyone run an O2 sensor in an EFI on a marine engine? It is possible for the ECU to have an internal failure that can kill O2 sensors. 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. 3. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. 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. Everyone raving about customer service is telling the truth! Holley EFI. Now the lower cost Holley Sniper advertised for March 31 2016. Holley EFI Oxygen Sensor. What motor is this on? Thanks for that, Danny. The Sniper will do that. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. Bolt-on carburetor style EFI for your classic car or truck. As far as spark control, the Sniper will let you tune those 4 points, nothing else will. EFI is the wave of the future. I would send an Email to Chris at EFIsystempro. Free ground shipping regardless of order size! Idle and off-idle performance (particularly as the engine goes into gear.) I was mocking it up at the time. Purely coincidence about the '2300' number. Part# 550-511. 29. Categories. Everyone else was backordered several months. Did you use the Holley fuel pump and have you had any issues with it? I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. Distributor and ignition box? Was in marine engineering for years. 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. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. Any exhaust down at engine level or lower will definitely get at LEAST some steam. 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. 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 4500 Marine. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. I am considering the Daytona Sensors Ignition module. Part# 50-5009QFT. YES! So there is at least some probability of success. Thinking about this I think this will work very fine! . The Sniper EFI throttle-body drops in place of your . Advanced throttle body injection systems capable of transmission control and more. From there, the idea is that it will self-tune to the requirements of the engine. Holley EFI has the solutions you need to get your project up and running better than ever! The spark must be manually tuned. 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. Follow USCG rules about materials and fittings. Here's the pic of the location with my header. Holley EFI Usb/Can Harness, Sniper Tbi. Newer ECMs have all the options to configure these functions. Has been since the 80's. I know from some of the other posts, there have been WBO2 sensor issues. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. I think I could run more boost but it's a real hand full right now. Sensors: Fitting: Threaded O2 . 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. 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. Features: . We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. 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. Most of Holley's EFI systems provide a Setup Wizard that builds a base configuration file that allows you to start the engine and operate the vehicle. 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). 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. EFI Systems based on Holley's world-class Dominator and HP ECU's. Capability Range: Advanced You will still get some water on the engine side of the snails, mainly at low Rs. 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. 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. 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. Vega$69. Register now for free! Categories. I am just now ready to do the tuning this weekend. away. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. I had an injector fail after a month of running and called the tech line who helped me figure that out. Part# 554-155. Maybe my manifolds leaked the inside between the snail and the log?? 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. Homemade body parts replace the originals as they rot away but it's a 40 on the inside. Then they had it repaired and back to me in 5 business days. $119.95. Holley Sniper EFI Wideband Oxygen Sensor. I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. If I am reading your post correctly you are using two separate o2 sensors when using headers ? You really want a bigger engine. But you still risk a little water running back at low Rs. JavaScript is disabled. Use a return fuel line. While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. 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. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. Precisely Adam. All I can say is it made a completely different motor out of the 460, 39 degrees out and starts within 2 revolutions power is super smooth throughout the rpm range (idle to 4100rpms 212 Hamilton with 4.0 turbo impeller) has about 6 hrs of learn time. p.s. If you let it cool down again, does it start up fine? Wiring the Holley Sniper EFI system is equally easy. 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. Super helpful and knowledgeable. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. It flows 850 cfm and can support up to 650 horsepower. No prime, but a second later it's ready to crank 'normally'. Increasing efficiency is always a good idea. blue doberman puppies. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. 4. you don't want to read that loss. http://forums.holley.com/showthread.ension-Harness, http://forums.holley.com/showthread.4388#post54388, If this is your first visit, be sure to Menu. The World's largest A replacement clamp on would be an easy change out. For a better experience, please enable JavaScript in your browser before proceeding. Still needs a EFI pump and return line. Seemed to be getting too much fuel on hot starts and flooding out, could get it to go by putting it to the floor while cranking as Action mentioned. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. The Sniper EFI master kit contains the most complete EFI fuel system on the market. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. My bet based on longer pump run, to make pressure, you have a leaking injector. Install the throttle linkage to the Sniper EFI throttle body. No matter what I do, it will not start. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. 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. Marc, you don't mention which system you installed but the Holley systems are fully configurable. 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. I also capped off the regulated return line with a hose, clamps, and chamfering bit. What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. 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. It doesn't even mean that you can't do it. I have tried several different settings to get it going, no luck. Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. The very basic fuel and spark tables are the limiting aspect, Holley does offer advanced software for more precise tuning. When buying the Holley Sniper EFI kit, you've got two basic options. The first option is to just buy the injector body and the controller with the wiring harness and sensors. Add To Cart. *Possible delays due to Covid-19 click for more information. Free ground shipping regardless of order size! 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 thought about adding some sort of extra protection but never did. Spray a rag down pretty good with brake cleaner. What exhausts are the best? The very front would be the safest place. 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. 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. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. He had one there that was run on a dyno then the fuel map was set and shipped back. I would prefer to run this brand new Holley EFI system in a closed loop, not set the fuel map, and use the O2 sensor as only a sensor. You must log in or register to reply here. The clamp-on that came with mine wasnt a good fit on my 2" pipe. I want to register an account for free right now! I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. Maybe this one has a shorter cable? 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. Sniper EFI 2300 Marine. A 90-degree V-6 has three shared crankpins set 120 degrees apart. 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. I've seen O2 sensors in water jacketed headers that have worked fine for years. EFI System Pro also has a good bit of tech info on their website. - You are currently viewing the forums as a GUEST. I hope that the next F/2F header is more O2 sensor friendly. 2023 Holley Performance Products, Inc. All Rights Reserved. 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. But MAP sensors are very easy to physically implement and are inexpensive. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. The Fora platform includes forum software by XenForo. Throttle body mounted ECU - no extra boxes to mount. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge.