I tried holley tech support, no answer and put on hold for hours. Sort. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. I will be calling around to see if I can find someone to help that has experience. All sensors are tested to ensure they accurately report critical engine data to the . The fuel pump question is the tough one. Spray a rag down pretty good with brake cleaner. 29. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. 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. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. Apr 13, 2017. with the extension. 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. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. 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. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Find a lower price anywhere and we'll beat it by 5%! 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. But it is going to be a little tricky. So much it could be. well I have installed the Sniper on my 460 KEM (Ford) marine motor. Still needs a EFI pump and return line. We also use content and scripts from third parties that may use tracking technologies. 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. I have tried several different settings to get it going, no luck. Categories. Precisely Adam. I installed a holley sniper kit. 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. 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. 74 FJ40 confined to the swamp. holley efi. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. looking at doing the same. I have a 74 bronco, 302, mild cam. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! running holley sniper without o2 sensorplymouth township mi police scanner. Sniper EFI 2300 Marine. Welcome to Club Cobra! Seems to LEARN much faster than the Fitech did. All times are GMT-6. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. 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. I have a 74 bronco, 302, mild cam. 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. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. The ones in the Bosch box come without warranty. The truck started fine after install, and ran down the road ok. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. So far so good. I had an injector fail after a month of running and called the tech line who helped me figure that out. Aftermarket headers are pretty much the only safe way to run an O2 sensor. 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. I installed a holley sniper kit. Put an end to cold start issues, hesitations, vapor . If this could be disabled it would be much better. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. 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. I will let you know what happens. The Sniper EFI throttle-body drops in place of your . Maybe going all the way to the front is the way to go? You can selectively provide your consent below to allow such third party embeds. 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. 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. 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. . When it did keep running, the headers all started to smoke. 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. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. Greatest struggle is the shift interrupt. To take advantage of all the site features, please take a moment to register. 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? As always, your results may vary and batteries not included. Just a rumor. Staff Writer. non biased Shelby Cobra related site! Newer ECMs have all the options to configure these functions. Bolt-on carburetor style EFI for your classic car or truck. Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. The sniper fit perfectly on the intake. I found this in the instruction manual for the older commander 950 system. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! 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. 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. Jun 7, 2021. functioning controller during engine operation. Ran about 5 seconds and died. I am a competent mechanic and I have checked all the usual suspect items. Sep 14, 2021. Search for O2 Hotel Taipei Main Station discounts in Taipei City with KAYAK. 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. Doesn't look like it will have an O2 sensor. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. 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. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. This doesn't mean it can't be done. 4. Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. Specs. Pay close attention to the instructions on O2 sensor placement. Miami, FL. 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. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. You have to one big hole in the riser, then you reach the cooling water, and one little hole in the next part of metal: now you reach the exhaust gasses. EFI System Pro had everything I needed for my EFI upgrade. We use cookies to enhance your experience while using our website. It's fast, simple and absolutely free. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. 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. 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. I recently installed the sniper setup on my stock 71 duster 340 4 speed. I myself will convert my 2 302's (Volvo Penta 5.0 l AQ231A) from carbs to EFI; I must find out everything before I start work on the engines, then I am satisfied to start. Look at the bottom.. Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. 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. Only a few hours on the motor but so far so good. Next, the new unit was installed onto the manifold. so simple check first, whats the fuel pressure? Stay up to date with the latest releases, events, promotions and more. 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. I also capped off the regulated return line with a hose, clamps, and chamfering bit. I had the pink ecu signal wire connected to a bullet connector on the passenger side . If you have long tube headers, mount the sensor approximately 6-10" after the collector. Wondering how you are progressing with this? An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. *Possible delays due to Covid-19 click for more information. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. What motor is this on? For a better experience, please enable JavaScript in your browser before proceeding. I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? Is Holley working on a complete marine package or planning to in the future? From there, the idea is that it will self-tune to the requirements of the engine. 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 . 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. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Thanks for the feedback on this adapter, Donald. $102.95. Capability Range: Advanced Got a picture? I have searched thru the forum as much as I can, with not much luck. That's great--we look forward to your results! What is your fuel pressure at the carb during crank? Anti-Seize pre-applied to sensor threads. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. Holley EFI has the solutions you need to get your project up and running better than ever! Supports up to 650hp with Four 100 Lb/Hr Injectors! Q1. I'm guessing by snail, that's another name for the riser? Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. 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. $43 per night (Latest starting price for this hotel). My boat is still in winter storage. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Staff Writer. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. Items 1 - 21 of 21 Items. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. From there, our highly trained factory refurbish technicians flow the original fuel injectors. You will still get some water on the engine side of the snails, mainly at low Rs. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. Also some tips on preventing O2 sensor damage Part # 554-155. The adapter plate installs in between the exhaust manifold and the riser/elbow allowing for the water jackets to still be in place and an o2 sensor to be installed in the still dry exhaust gasses. You are using an out of date browser. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. 10 min read Video. 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. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. But you have to get it tuned. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. Otherwise I have to check for a place in my gasoline tank to put the lines in. Holley Sniper O2 sensor replacement. I purchased the Holley HP MPFI system and went to the lake with it. A replacement clamp on would be an easy change out. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI.