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Can anyone share their experiences with this type of setup? Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. There is no problem getting this tuned and then running open loop. 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. Is Holley working on a complete marine package or planning to in the future? 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 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. Miami, FL. Installing MegaSquirt in Parallel With the Stock ECU The fuel lines and fittings are 3/8s with 8AN fittings and everything on the 60 requires 5/16 fuel line with 6AN fittings) Holley Sniper EFI 550-849 Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. It appears that its a tuning issue. 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. . Do you recommend in-tank or external fuel pump? 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. Staff Writer. 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. : For registered members this ad will NOT show. Is this a viable upgrade for my boat? Items 1 - 21 of 21 Items. Perfectly Taipei - 25 Must-See City Highlights | Taipei Travel 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. Sorry for the late reply. 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. Then if that doesn't work call the tech line they are great! To close this one out, below is a photo of where I installed the O2 bung. Holley recommends a 3/8" fuel supply line. Advanced throttle body injection systems capable of transmission control and more. Will I be able to control my ignition timing with the Sniper? 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. *Possible delays due to Covid-19 click for more information. YES! Holley EFI. Seems to have more low end tq and is much smoother power through out the rpm range. How To Properly Place and Install an O2 Sensor - Holley He also explains how to properly install them. 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. Explained: Holley EFI Sensors and What They Do To simplify . Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. The light shines in the darkness, and the darkness has not overcome it. 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. And who can blame them? One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . The throttle body has a built in fuel pressure regulator set at 58.5 psi. They have been working out well for a few years now. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. He had one there that was run on a dyno then the fuel map was set and shipped back. I've seen O2 sensors in water jacketed headers that have worked fine for years. 2 Reviews. I tried holley tech support, no answer and put on hold for hours. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Has been since the 80's. Stay up to date with the latest releases, events, promotions and more. 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. Yes, this is going to be an added expense, however, it will help guarantee your success. 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. I have searched thru the forum as much as I can, with not much luck. Holley Sniper O2 sensor replacement - Club Cobra 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. I will keep the in-line pump for a spare. 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? If this is a first time effort, find a tuner in your area with marine experience. The Sniper EFI master kit contains the most complete EFI fuel system on the market. 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. The first thing to consider here (if you are in the USA) is US Coast Guard (USCG) Safety Approval. Why? (REGISTERED USERS DO NOT SEE THIS POST/AD! 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. You should then have at least 18-24" of pipe after the sensor. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle, By Corey A on June 4, 2021 | Verified Owner. Jun 7, 2021. Sniper EFI 4bbl Marine. Part# 554-155. 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. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after 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. Holley part number 554-155. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Seems to LEARN much faster than the Fitech did. I had the pink ecu signal wire connected to a bullet connector on the passenger side . 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. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. 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. But you have to get it tuned. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. Thanks guys. Running? Capability Range: Advanced My hand is holding the connector to the sensor. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. I'm guessing by snail, that's another name for the riser? The target A/F value based on load or MAF cfm, and engine speed. To take advantage of all the site features, please take a moment to register. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . The spark must be manually tuned. (probably with the edelbrock marine 2506 intake). I thought about adding some sort of extra protection but never did. Shop Oxygen Sensors at Summit Racing. Sniper EFI Installation Guide. Vega$69. 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. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. For a better experience, please enable JavaScript in your browser before proceeding. Fuel economy went from 12.5 to 13.5 gph to 10 gph. Also the progressive link. . What Is Pinion Offset, And How Does That Affect You? is donald smith still alive; julie grant court tv cheerleader In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. 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. The Tech Tips and discussions are also great! This Video Shows Ideal O2 Sensor Placement! ), 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. (If I am incorrect I heartily invite your comment at the bottom of this article!) turn on the ignition.but do not start the engine. Replacement Sniper and Terminator X O2 Sensor. Holley efi behavior with bad o2 sensor, safety feature 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. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. Part Number: 510-554-155. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. Apr 13, 2017. with the extension. looking at doing the same. Could show a lean condition when in fact it really isn't. 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. It works great where its at. Otherwise I have to check for a place in my gasoline tank to put the lines in. 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. It should be pretty straight forward what each of these values do. 29. 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. It is possible for the ECU to have an internal failure that can kill O2 sensors. EFI Swap | Shamrock Boat Owners' Club It's a compact HP pump and cooler assembly. Yes! With a bad TPS you will have to manually prime to try and get it . May 19, 2021. Did you use the Holley fuel pump and have you had any issues with it? I am considering the Daytona Sensors Ignition module. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). I installed a holley sniper kit. He knows his stuff, gets back quickly to you, etc. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. My question is concerning what happens a year later, when I have a top-end swap . I was mocking it up at the time. Amazon.com: Holley EFI Wbo2 Sensor, Sniper Tbi : Automotive There can be leftover debris from manufacturing that have been washed down and are now clogging one.