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. I was thinking aluminum heads would run it up closer to 5,000 rpm. Holley Sniper EFI System is Easy, Budget-Friendly Path to Fuel 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. YES! I'm guessing by snail, that's another name for the riser? In Stock. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. Holley Sniper Marine EFI | Bloodydecks Idle and off-idle performance (particularly as the engine goes into gear.) Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. When problem-solving this type of issue, consider when and how you could use a work-around. #1. Then turn the engine off and "lock in" the tune in a non-feedback loop mode, and quickly remove the headers and wash them off to prevent damage and then swap to the manifolds, but that would honestly be a huge PITA. Sort. 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. 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. When it did keep running, the headers all started to smoke. The sniper fit perfectly on the intake. Thanks for the heads up. I am looking for a TBI with full sensors, mainly atmospheric for Sept and Oct and a Idle Air sensor for warm starts.I welcome your thoughts.Regards, 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. Holley efi behavior with bad o2 sensor, safety feature As far as packaging goes, one comes in a Bosch box, the other in a Holley package. O2 sensor failure on a Holley Sniper EFI - YouTube $132.95. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Affiliate. :-), I started using OMC and Volvo Penta pumps for my conversion. *Possible delays due to Covid-19 click for more information. Holley Sniper O2 sensor replacement - Club Cobra The in tank pump is quieter, will normally run cooler and should last longer. My hand is holding the connector to the sensor. What Is Pinion Offset, And How Does That Affect You? 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 installed the adapter and elbow so it's at an angle above the entry point. It does not work with the Sniper EFI oxygen sensor. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. Good luck! That is defacto step one in trouble shooting fuel injection systems. In order to do this, it heavily relies on proper O2 sensor placement. EFI is the wave of the future. He is a wizard, might be able to give you some pointers, will ask you what version of the software you are on, whether you're running the progressive adjustable linkage, etc. Part# 534-199. Part# 554-155. holley efi. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. If you are not running the latest software stop guessing and go download it. They have been working out well for a few years now. 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. Are you running the latest software? 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. (probably with the edelbrock marine 2506 intake). 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. As always, your results may vary and batteries not included. Good luck to all. I installed one also on mercruiser 260 hp. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. 10 min read. Do you also recognize that the O2 sensor that is required for closed-loop operation will not survive in the "wet" manifold used by most marine engines, and that to install a device to protect the O2 sensor from this moisture may require the removal, machining, and replacement of the exhaust manifold? For now I have a genuine bosch O2 and Standard Automotive TPS installed. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. Replacement Sniper and Terminator X O2 Sensor. Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! 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. May God's grace bless you in the Lord Jesus Christ. Currently has 2 bbl carburetor and mechanical distributor, mechanical fuel pump for 165hp. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. CTS (Coolant Temperature Sensor) - Reads engine temperature. 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. The spark must be manually tuned. O2 Sensor in a boat exhaust | Performance Boats Forum 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. Got a picture? Holley Sniper EFI - Page 3 - Offshoreonly.com I'll let you know how it works out. YES! I am a competent mechanic and I have checked all the usual suspect items. I am happy with Holleys no hassle replacement of the parts. Add to Cart . Replaced O2 sensor but continued to have AFR issues running too rich. 4. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after http://forums.holley.com/showthread.ension-Harness, http://forums.holley.com/showthread.4388#post54388, If this is your first visit, be sure to Fuel prices at the marina are usually about a dollar a gallon more than at the local Racetrac/Wawa/wherever, and even more if you wisely opt for ethanol-free fuel. It does not look like anything particularly superior in concept. EFI EFI kit electronic fuel injection. Specs. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise On my system, I machined in the O2 sensor right between the snail and the manifold of a . And it is timing that is equally critical to best performance and fuel economy. Has anyone run an O2 sensor in an EFI on a marine engine? Bolt-on carburetor style EFI for your classic car or truck. About your only location is in that short area from the log to the port face. I really dont want any issues on the whitewater lol 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. All sensors are tested to ensure they accurately report critical engine data to the . This was for MPFI. Now the lower cost Holley Sniper advertised for March 31 2016. Visit their website for more details. 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. 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)? Add to Cart . An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. Great Article. Wherever you go, the cultural kaleidoscope of Taipei showcases exhilarating diversity. So I bought the progressive linkage but you then have . I will let you know what happens. The spark must be manually tuned. There was a 1.5 point difference in afr between banks. Installing Holley's Sniper EFI Quadrajet System on a 1970 Corvette Otherwise I have to check for a place in my gasoline tank to put the lines in. Yellow Init In First shown for an instant when the system is powered on. 2023 Holley Performance Products, Inc. All Rights Reserved. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Capability Range: Advanced Sniper EFI 2300 Marine. Here's the pic of the location with my header. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. 3. 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. Then they had it repaired and back to me in 5 business days. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Welcome to Club Cobra! Please consult the Holley Sniper full manual and use this guide for supplemental clarification. I have not gone back in to try to fine tune them. Anybody got a good 270hp 350 tune yet?I installed sniper efi on my boat runs good but feel like the wot should be better need to get the sniper controlling spark is my thoughts the old thunderbolt is either not great or timing wasn't right when I bought the boat but she runs great I just think this engine has more in it then I'm getting out of it at this time any tuning and timing advice would be great considering I'm awesome with carb n hei diet but new to efi and boat timing curve but not an idiot so I say. Description. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. 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.. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Have engine apart and head checked and cleaned at machine shop. 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. For the most part, the small harness is plug-and-play. There can be leftover debris from manufacturing that have been washed down and are now clogging one. Master ASE tech since 91. Part # 554-155. 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. Sniper EFI Releases new Stealth 4150 Models! You will still get some water on the engine side of the snails, mainly at low Rs. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. Holley EFI Oxygen Sensor. 02/25/2020. Menu. They have mods that help. 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. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. Installing Holley Sniper EFI on a daunting, odd-fire V-6: Part 1 PDF Holley Sniper Installation Supplement EFI System Pro had everything I needed for my EFI upgrade. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Q2. Add to Cart . You have to angle it to help the throttle cable get around the booster. 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. From there, the idea is that it will self-tune to the requirements of the engine. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Waiting for spring to put back together. a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . 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! Have you visually verified that all your injectors are spraying? It appears that its a tuning issue. I installed it without O2 sensor, adjust on the fly. I would send an Email to Chris at EFIsystempro. $108.95. I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. I thought about adding some sort of extra protection but never did. Welcome to ClassicBroncos! B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. 2014 FJ Cruiser - White - 4X4 - Loaded - . 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. As far as a sensor goes, absolutely nothing. Full product line and accessories at excellent pricing. 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 a better experience, please enable JavaScript in your browser before proceeding. It works great where its at. test the sensor.. for a basic pass/fail of the sensor. All of the wiring begins at the throttle body and connects outward from there. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. 5. I've dunked mine lots of times. I found this in the instruction manual for the older commander 950 system. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. quick fuel. 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. Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. Sort. Holley Sniper EFI Wideband Oxygen Sensor. 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. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. I tried holley tech support, no answer and put on hold for hours. 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. Holley EFI 534-199 Wideband Oxygen Sensor Extension Cable After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . AFR was 19 area. Runs like a champ now. You are using an out of date browser. Converting Marine Engines to EFI | EFI Pro Hangout | General Studies 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. the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. They are the only ones got me a holley usb to can cable fast. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. They are about 4 inches long, in-line between the log and manifold. I would back-burner the ignition control questions until you get the fuel injection working. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. The target A/F value based on load or MAF cfm, and engine speed. Stay up to date with the latest releases, events, promotions and more. 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. Adam. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . looking at doing the same. Yes, this is going to be an added expense, however, it will help guarantee your success. 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. Maybe this one has a shorter cable? I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Yes, this is an old thread, but it's an old unit. QFI-500 Oxygen Sensor. MAP Sensors. 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. Find a lower price anywhere and we'll beat it by 5%! The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. Is this a good upgrade? Thinking about this I think this will work very fine! O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. The engines are rated at 170 hp each. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. 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 . Advertising . Price Point: $$$. 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. Supports up to 650hp with Four 100 Lb/Hr Injectors! Holley EFI 534-49 Holley Oxygen Sensor O2 Bung Weld-In Style The ones in the Bosch box come without warranty. I purchased the Holley HP MPFI system and went to the lake with it. Sniper EFI 4bbl Marine. You can selectively provide your consent below to allow such third party embeds. He had one there that was run on a dyno then the fuel map was set and shipped back. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. The clamp-on that came with mine wasnt a good fit on my 2" pipe. Yellow Cold! Well an update on the Sniper install. 2 Reviews. 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? If this could be disabled it would be much better. Features: . Only a few hours on the motor but so far so good. Everyone else was backordered several months. 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 think I could run more boost but it's a real hand full right now. 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. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. 10 min read Video. functioning controller during engine operation. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. well I have installed the Sniper on my 460 KEM (Ford) marine motor. 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. Product Q&A . *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Each engine has the Holley marine 2 barrel carburetor. 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 . 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. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. The O2 sensor burned out immediately. Free ground shipping regardless of order size! I want to register an account for free right now! According to AEM Electronics, a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: Additionally, if an Sniper or Terminator X EFI System has repeated O2 sensor failures and none of the above-listed suggestions seem likely then contact Holley and arrange to have the unit tested. Any exhaust down at engine level or lower will definitely get at LEAST some steam. Engine Startup Tuning for Sniper and Terminator X Stealth Owners With a bad TPS you will have to manually prime to try and get it . 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.) Part Number: 510-554-155. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Add to Cart . Running? Advanced throttle body injection systems capable of transmission control and more. To close this one out, below is a photo of where I installed the O2 bung. Troubleshooting Holley Sniper that hesitates on acceleration Dec 28, 2016. temporarily running without WBO2 sensor? - Holley 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. Hooker BlackHeart Oxygen Sensor O2 Bung 2.25" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 3.0" Clamp-On Style, Holley Oxygen Sensor O2 Bung Weld-In Style. 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 I am reading your post correctly you are using two separate o2 sensors when using headers ? I have a 74 bronco, 302, mild cam. Your talking flames at that point, and it will definitely have an effect on the reading. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Wideband Realities: The Truth About Oxygen Sensors - EngineLabs
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