(Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Product Q&A . Car runs perfect . I will be calling around to see if I can find someone to help that has experience. I'll let you know how it works out. 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. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. Plug into the coolant temperature sensor. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. 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 Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. i thought about it, but after $3400 on an EFI alone and an entirely new rigged boat Im having a hard time forking out another 2000 for an exhaust when I may just do an open loop My buddy machined up a set of spacers I sketched out for him. Sniper EFI Releases new Stealth 4150 Models! Seems to have more low end tq and is much smoother power through out the rpm range. The sniper fit perfectly on the intake. Visit their website for more details. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Your talking flames at that point, and it will definitely have an effect on the reading. $5 Off Your $100 Mobile App Purchase . Holley EFI Oxygen Sensor. Capability Range: Moderate I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Then they had it repaired and back to me in 5 business days. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Late to the party but here's where mine are installed. non biased Shelby Cobra related site! In Stock. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. Jan 20, 2019. No worse than taking the reading in the intake manifold cross over. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Add To Cart. Fuel economy went from 12.5 to 13.5 gph to 10 gph. 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. Sniper EFI 4bbl Marine. AFR was 19 area. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Holley EFI. Hopefully this one lasts longer than the original. Will I be able to run both systems off of one fuel pump? A third option would be to run your EFI system without an O2 sensor at all. And the relay and fuse were mounted along the firewall. Has been since the 80's. If this is a first time effort, find a tuner in your area with marine experience. Good luck! p.s. Only a few hours on the motor but so far so good. It will flood itself out and won't start back, just crank and crank. Part # 554-155. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. It has about 18 hrs to date and is working great. Jun 7, 2021. Full time feedback from the sensor is what the computer uses to refine the fuel table. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. Holley EFI has the solutions you need to get your project up and running better than ever! But MAP sensors are very easy to physically implement and are inexpensive. 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. $43 per night (Latest starting price for this hotel). All times are GMT-6. 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. There is no problem getting this tuned and then running open loop. 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. Could show a lean condition when in fact it really isn't. Are you running the latest software? The new Exhaust manifolds will have wideband O2 bungs for tuning. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. You need to intimately know the system you are using, its capabilities and limitations, install it correctly and have it tuned with someone with experience specific to marine applications. Otherwise I have to check for a place in my gasoline tank to put the lines in. 2014 FJ Cruiser - White - 4X4 - Loaded - . The target A/F value based on load or MAF cfm, and engine speed. Everyone else was backordered several months. 5. $108.95. 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. I'm using the NTK sensor. Do you recommend in-tank or external fuel pump? New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. . Brand: Holley EFI Emission Code: 5: Material: . $119.95. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. He had one there that was run on a dyno then the fuel map was set and shipped back. Stay up to date with the latest releases, events, promotions and more. By bypassing the built in pressure regulator in the fuel module(allowing full flow and pressure), using 3/8 hard lines to/from the sniper to meet CG rules( no soft lines on the engine block)using the snipers fuel pressure regulator, This is as close as I can come to safe. Sadly, no. 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. 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.) I found this in the instruction manual for the older commander 950 system. I was thinking aluminum heads would run it up closer to 5,000 rpm. Sorry for the late reply. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Let me know how I can be of assistance. the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. But you still risk a little water running back at low Rs. I also capped off the regulated return line with a hose, clamps, and chamfering bit. I tried holley tech support, no answer and put on hold for hours. Thanks guys. The O2 sensor burned out immediately. It will not fit on round or oval risers without a suitable flat area. . check out the. you don't want to read that loss. 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? I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. I purchased the Holley HP MPFI system and went to the lake with it. JavaScript is disabled. All of the wiring begins at the throttle body and connects outward from there. The first option is to just buy the injector body and the controller with the wiring harness and sensors. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. I hope that the next F/2F header is more O2 sensor friendly. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. 2. If you call, they usually let you put in your name and they get back to you. I installed a holley sniper kit. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Everything about the fuel prime shot can be adjusted. Thanks. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. But for just over $10 and two simple configuration changes you can switch to a progressive linkage that opens only the two primary barrels at first and then brings in the secondary barrels at a later point. Find a lower price anywhere and we'll beat it by 5%! Advertising . No matter what I do, it will not start. They are the only ones got me a holley usb to can cable fast. 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. It's fast, simple and absolutely free. 29. Are you running the entire system? 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. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. 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. 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. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. 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. It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. . Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. A replacement clamp on would be an easy change out. 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. I have a 74 bronco, 302, mild cam. 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 have searched thru the forum as much as I can, with not much luck. 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. Initial Calibration in Basic Configuration. I'm looking for some more practical and scenario-specific advice; that's one small piece of it.