Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. I am happy with Holleys no hassle replacement of the parts. I'm 3" down from the bottom of the flange to center of bung. 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. In the case of the car, you can generally get out and walk (run?) The reason I say this is that nowhere in this discussion is the fact that none of these systems are are handling the timing on the fly. Thanks for the compliment--we look forward to your feedback! In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! If the indicator reads "LOW Err" double check the connection to the CTS. Part# 550-511. FWIW, I called Holley to confirm the part number and they say the Bosch part number if 17212 (also available on Amazon for $64.78). (If I am incorrect I heartily invite your comment at the bottom of this article!) You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. Follow USCG rules about materials and fittings. Register now for free! They are the only ones got me a holley usb to can cable fast. 5. Specs. 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. Other? He had one there that was run on a dyno then the fuel map was set and shipped back. Not sure how well the sensor likes being that close to the port. 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! Shop Oxygen Sensors at Summit Racing. holley efi. Q3. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? . a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . The ones in the Bosch box come without warranty. 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. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Thanks again for writing! 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. Ran about 5 seconds and died. I really dont want any issues on the whitewater lol But it is going to be a little tricky. Holley 554-100 NTK Wideband Oxygen Sensor. Otherwise I have to check for a place in my gasoline tank to put the lines in. The bottom line is that trying to run EFI on a marine engine is not something you can do as an afterthought. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. I am a competent mechanic and I have checked all the usual suspect items. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. We use cookies to enhance your experience while using our website. Prime cannot be adjusted on this old unit. . What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. There is no problem getting this tuned and then running open loop. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! It will crank and run great for 2-15 seconds then die. You should then have at least 18-24" of pipe after the sensor. Other than the constraints provided in the article above I see no reason why this wouldn't be a great upgrade. 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. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Precisely Adam. There was a 1.5 point difference in afr between banks. Holley EFI has the solutions you need to get your project up and running better than ever! Replaced and gapped to .45 all spark plugs. When problem-solving this type of issue, consider when and how you could use a work-around. Newer ECMs have all the options to configure these functions. I have searched thru the forum as much as I can, with not much luck. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? 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. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. check out the. What exhausts are the best? I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. 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. Note the temperature sensor mounted on the back of the driver side head in the above photo. Thanks for that, Danny. YES! It doesn't even mean that you can't do it. 29. Got a picture? It's a compact HP pump and cooler assembly. Find a lower price anywhere and we'll beat it by 5%! 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. 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. I'm about to embark on the same type of project. But you have to get it tuned. I recently installed the sniper setup on my stock 71 duster 340 4 speed. Aug 17, 2013. Conditions when closed loop o2 should be turned off. Put an end to cold start issues, hesitations, vapor . #3. Dec 28, 2016. I will be starting mine up this month, I hope it goes well, good luck to you. Apr 13, 2017. with the extension. 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. Part# 50-5009QFT. My question is concerning what happens a year later, when I have a top-end swap . 10 min read. Ref: https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/I heard of the new Sniper EFI from some chatter on OffshoreOnly.com. 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. Doesn't look like it will have an O2 sensor. This really applies to any O2 sensor regardless of EFI system. Holley EFI Oxygen Sensor. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? If this could be disabled it would be much better. Sort. 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? Sensors that are installed in an exhaust must be connected to a properly For a better experience, please enable JavaScript in your browser before proceeding. I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. Sniper EFI 4500 Marine. 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. Sensors: Fitting: Threaded O2 . Hello Chris,Ontario's boating season is about to launch for another year.Do you have any good news to add to your above article, any new marine friendly TBI products?In '08,I installed a Holley 21-700 TBI with the o2 mounted in the manifold to Holly specs. It will not fit on round or oval risers without a suitable flat area. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Hopefully this one lasts longer than the original. Welcome to Club Cobra! "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . Wondering how you are progressing with this? The throttle body has a built in fuel pressure regulator set at 58.5 psi. Is this a good upgrade? One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Here is one on start up tuning. To those who have installed the Sniper EFI units, please post up some photos of where you tapped the exhaust line to install the Oxygen Sensor's weld bung. The Sniper EFI throttle-body drops in place of your . If you call, they usually let you put in your name and they get back to you. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. 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. 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? so mine has been pretty good but 1 out 20 starts you can hear the fuel pump run longer then normal..when it does that it will light off then diebut if i put my foot to the floor it will start..still working on that 1..timing i am running 12 cranking.20 idle.40 cruze.35 wotstill playing with all of this..Mine is also a sniper stealth. Having the same problem with my sniper as well, intermittent hot (and cold) start issues. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. I am just now ready to do the tuning this weekend. ), 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. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . I installed one also on mercruiser 260 hp. Bolt-on carburetor style EFI for your classic car or truck. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. In order for it to work as designed the O2 sensor has to be installed in a dry exhaust system and needs to be placed 1-10in from the collector in the headers. 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. You must log in or register to reply here. Capability Range: Advanced Holley EFI requires several pressure inputs in order to run an engine. - You are currently viewing the forums as a GUEST. Full time feedback from the sensor is what the computer uses to refine the fuel table. Found out that it was due to rfi/emi. Yes! Bolt on 4150 Flange Carburetor Replacement. 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! Wiring the Holley Sniper EFI system is equally easy. 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. 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. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. Also some tips on preventing O2 sensor damage 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. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. 2. Specs. Distributor and ignition box? The Fora platform includes forum software by XenForo. 100% identical. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Aftermarket headers are pretty much the only safe way to run an O2 sensor. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. 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. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. Full product line and accessories at excellent pricing. Emissions. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. Part# 554-155. holley efi. A replacement clamp on would be an easy change out. Miami, FL. 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). 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. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. If you are not running the latest software stop guessing and go download it. The wiring was a bit of a mess. Welcome to ClassicBroncos! The very front would be the safest place. 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. Holley EFI Usb/Can Harness, Sniper Tbi. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. 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. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. For a better experience, please enable JavaScript in your browser before proceeding. I received my replacement TPS and O2 sensor. I have tried several different settings to get it going, no luck. Add to Cart . Has been since the 80's. So much it could be. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle, By Corey A on June 4, 2021 | Verified Owner. Replacement Sniper and Terminator X O2 Sensor. If you let it cool down again, does it start up fine? He knows his stuff, gets back quickly to you, etc. 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. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . EFI Systems based on Holley's world-class Dominator and HP ECU's.