EFI Systems based on Holley's world-class Dominator and HP ECU's. At this point you may need to enlist the help of whomever sold you your Sniper. Crossing the Clear Flood TPS level will have no effect when the engine is at operating RPM. I will be using an auxiliary fuel pump for the NOS fuel feed. There are a few things you can do to try to divide up the system a bit and find the problem.I'd start by disconnecting the 10-pin connector and grounding the output you used for your solenoids on the side of the connector that goes the the solenoids. Beginning with the 0-1848-2, this new carburetor draws roots from the original 465 CFM List: 1848, but will all of the contemporary features you've come to love from their Street Warrior models. Step 1: Enable Nitrous. Brand New Holley Sniper EFI Self-Tuning Master Kit, Black Ceramic Finish Holley Sniper 4 Barrel Fuel Injection Conversion - Self-Tuning Master Kit plus Handheld EFI Monitor (Part #550-511K) Holley just brought EFI within range, introducing Sniper EFI master kits! Can the tps on the sniper be used for this?On the carb kit I used two relays so that I could give it wot on the transbrake. t is critical to use high pressure clamps or AN fittings to reduce the possibility of a fuel leak. Price Point: $$$. Look no further. Update 11 June 2019: I fail to point out above that you need to enable and set a stage duration. So I'll be showing you how to reconfigure the inputs and outputs to support the wiring diagram shown above, as well as giving some tips on other configuration settings that you might choose to use in your particular setup. Probably the primary consideration of where to set the TPS trigger will depend less on how far you want to press the pedal before nitrous sprays and more on how far you want to have to lift to get it to stop. Alright, but what electric fuel pump should I use? Second, you need to go into the Fuel / Startup Enrichment tab of the software and move the "Clear Flood TPS" up to 100%. When implementing a wet system with two solenoids, be sure to add the current ratings for both the nitrous and the fuel solenoid to come up with the fuse rating. I can't recommend EFI System Pro enough. A Sniper EFI system requires the use of … NOTE: Higher horsepower applications will require installing an -8AN O-Ring fitting (3/4-16 Male O-Ring) to provide sufficient fuel supply. Those are all great subjects but are beyond the scope of what we will discuss here. Thanks. JETFAST. While it can move the required volume of fuel, it cannot maintain a pressure needed to supply your Sniper's fuel injectors. Can the sniper do this with out the two relays. If not then your problem is to the right of the connector.If the solenoid does engage then reconnect the connector. Actually, I've got the hard part of writing the Transbrake article you request done (creating the schematic) and just need to find the time to put words to it and publish. Can I use an output from the sniper or should I use the master enable toggle switch? Holley Sniper EFI has arrived and it's here to change the traditional ways of thinking about electronic fuel injection. The nos would hit on realease of the transbreak button. Next, go down to the time scale at the bottom. Install the throttle linkage to the Sniper EFI thro… Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. My question is if you use the transbrake feature as you showed will it disarm the nitrious until you release the button. All Rights Reserved. You can now go and set your percentages of nitrous application at each RPM level at the top of the graph or by dragging each triangle to the value you choose. The Super Sniper EFI unit can take care of numerous extra functions that the “extra goodies” racers like to install require. However, most of the information is directly applicable to Terminator X so we invite those owners to use this as well. Not much is going to happen without that. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a “criss-cross” pattern (60-80 in.lbs.). Read other articles I've written about the. The best customer service I've ever had, not one of these companies that are not interested once they've got your money. Fuel Filters: Most carbureted applications will require a 100 micron pre-filter (before fuel pump) and a 40 micron post-filter (after pump, before carb). As always, a note up front about what this article is and isn't. Absolutely! It is critical to use high pressure clamps or AN fittings to reduce the possibility of a fuel leak. Installation Kits are in stock and will ship separately*** Holley just brought EFI within range. EFI has the ability to adjust the fuel and spark the motor receives on the fly, thus eliminating some of the consistency issues you might have at the track. If you've done that then you should be find the input is available to assign to something else. Consumers have been asking for a throttle body injection that looks like a 4150 Holley carburetor and Holley's Sniper EFI division has responded with the new Sniper Stealth 4150. It's use is illegal in some locations and should only be used in sanctioned racing competition that specifically condones and regulates the use of nitrous oxide. Take the following actions: If any of the indicated input/output are not available in the pull-down that means they have been used elsewhere. Again, when you press the button, the volt meter should be grounded and show 12 volts on the gauge.IF everything works to this point you're going to have to dig in to your configuration--either something is not right in the configuration or there is something physically wrong with your Sniper throttle body. For this example I set the pedaling strategy to Pause Enabled, which means the ECU will stop spraying nitrous when the pedal is lifted, but will go right back at it when the pedal is again depressed. )If that works, then do the same thing with the input to the nitrous trigger (the yellow wire in the example above.) The diagram we use shows dual solenoids indicating a "wet" nitrous system, that is, one that sprays the additional gasoline required by the horsepower increase that the nitrous produces in the engine. Yes, it will. You simply can't beat the stunning looks of a tri-power setup...nor can you beat the noise!Read More. With zero in the leftmost cell, round your ET up and put that in the rightmost cell. Proceed that way with appropriate caution. The goal of this article is not to give a comprehensive overview of everything that the Sniper EFI System can do with regard to nitrous control but rather to provide a quick familiarization so that you will be compelled to try more. Holley does not make a tach drive dual-sync distributor as far as I can tell. On my current carb set up I’m all in with the wot switch. For starters, your fuel system will need to be upgraded. Capability Range: Professional The Holley Sniper EFI Tuning and Log View Software User Manual, accessed by clicking the "Help ?" My plan is to run 1 dry kit through plate. Looking to convert your blow thru carbureted turbo engine to EFI? Put the red wire on the battery +12 volts. Great writ up. Click that. Refer to my instruction on Sniper EFI Firmware to determine which software version you need for your particular firmware and how to download that. Note that the linkage usually doesn't carry the TPS sensor all the way to 100% (that's a good thing) so you need to see where your TPS max's out when you put your throttle pedal completely to the floor rather than simply set it to 100%. Holley Sniper EFI System. Which would explain that. Below is a list of systems that will require an external fuel press regulator : Fuel Fittings: All Sniper EFI systems will use -6AN fuel inlet/outlet connections (Stealth 4500 utilizes -8AN O-Ring Fittings). NOTE: Spraying nitrous oxide into your engine has the potential of destroying the engine or creating horsepower levels that may be unsafe for the chassis or driving environment. You must re-enable it, unassign the input, and then disable that feature again. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Condensed down to its basics, Holley created a very affordable way to finish off a late-model LS engine swap with fully functioning EFI. Holley has been the undisputed leader in fuel systems for over 100 years. That should only be done if the coil (+) is connected to a 12-volt source and not being driven by any sort of ignition amplifier or ignition box. Okay, great! Holley carburetors have powered every NASCAR® Cup team and nearly every NHRA® Pro–Stock champion for four decades. The minimum RPM setting is not meant to control when the nitrous is initially sprayed. I’ve followed these instructions and still am not able to get the solenoids to activate what am I missing, Based on your short description it's a little hard to say. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! The Sniper is the economical "entry-level" kit from NOS that simply blows away competitive kits. Bolt-on carburetor style EFI for your classic car or truck. 2.5 Bar MAP sensor included which safely works on applications up to 21.5 PSI; Built-in Single stage progressive nitrous control; Dry or Wet Nitrous Support That's right, Holley is announcing a revamp of their "Classic Carb" line-up with modernized versions that are constructed from light-weight aluminum! Once you see how this is done you should be able to proceed with your installation having the basic guidance that is otherwise lacking in any other Sniper EFI System documentation that I have found. Version 6 of Holley EFI's popular tuning suite has officially been released and with this revision comes a slew of race-focused updates. Even if I assign #2 to the regular input it still is not available for the master input? Thanks. Emails are answered immediately. If you're doing that and it's not working then you might want to contact Holley to see if they have some insights but I can't imagine that's the case. It just moves the timing up and down to help control the idle rpm's. Post a comment below! Step 5. All you need is … An alternative method (that won't be discussed in adequate detail here) would be to use this button as a disable, which would allow you to disable the nitrous while you are on the trans brake. The maximum current draw through the 15620NOS Solid State Relay / Solenoid Driver should be limited to 40 amps, but I would use a fuse that is closer to the maximum current draw for the solenoid itself. Can I do the same with the tps without the button and not have progressive control either? Very Quick Shipping & Help Guides Have Been Invaluable For Setting Up My Holley Sniper. Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. If using the toggle switch can I wire a relay for the fuel pump, negative switched, to the master enable toggle switch? Free ground shipping regardless of order size! You've got this, Pro! Select TPS Trigger, Minimum and Maximum RPM limits, and Pedaling Strategy. Holley Sniper 550-870 - Holley Sniper EFI Stealth 4150 Fuel Injection Systems Fuel Injection System, Stealth, 4150 Flange, Polished, up to 650 hp, 870 … Optional: Transbrake, Dry Nitrous, AFR Cutoff, Timing Retard, Closed Loop Control. In the original article, I mentioned I was not an EFI expert, but after some simple research – and with the help of the Holley tech line – I was able to inflict some simple adjustments to make the Sniper even better for my application.I started by adjusting the fuel prime – which squirts a small amount of fuel into the intake to aid in start-up. Holley carburetors operate at a range of 5.5 to 7.5 psi of fuel pressure and use a 40 micron filter. The only reason that you would not see those inputs is if they are assigned to something else. Start by clicking on the ECU icon (as shown in the image below) and theck click on "Basic I/O" in the task bar to the left. Step 2: Unassign Required Inputs & Outputs. (See the link to my transbrake setup article at the bottom of this article.). I don't see a problem with powering on your NOS fuel pump using the master enable via a relay. Bolt-on carburetor style EFI for your classic car or truck. Modeled after an Ultra XP carburetor, the new Stealth 4150 features four 100 lb/hr injectors, dual feed configuration and supports up to 650 hp naturally aspirated! Let's take a look at the items that would need to changed or can handle the higher pressure. First, you'll need to run your minimum RPM down to 0 unless you have some better way to simulate 2000 RPM (or whatever minimum RPM you have selected for your setup.) Advanced throttle body injection systems capable of transmission control and more. Fuel Filters: Most carbureted applications will require a 100 micron pre-filter (before fuel pump) and a 40 micron post-filter (after pump, before carb). Bench Testing Tips: (Added 11 Jun 2019) If you want to bench test this there are a couple of things to keep in mind. It will ask if you want to choose a nitrous congifuration to import. Step 4. First, the Sniper ECU should be grounded directly to the battery, and there should be good separation between the noisy high-current grounds like the solenoids and low-noise grounds (like the ECU inputs.) The engineers at NOS have hit a bullseye by designing the finest entry-level nitrous system available today with the NOS Sniper kit. I highly recommend them to anyone deciding to go EFI. I prefer to implement "dry" nitrous systems, where the EFI System itself adds the necessary increased gasoline, but because that would probably double the length and complexity of the article we will stick with "wet". The 550-510K , 550-511K, and 550-516K fuel injection systems include … A Sniper EFI system requires the use of 100 micron pre-filter and 10 micron post-filter. If you fail to do this you will experience all sorts of bizarre behavior when transitioning the TPS across the Clear Flood TPS value. This gets a bit more complex and requires specific protection measure for your ECU if you wanted to use your transbrake button as a nitrous diable button. Using the Holley Sniper EFI to control timing when you’ve got Holley’s Dual Sync EFI Distributor will require Holley part number 558-493 to connect the EFI ECU and the distributor. I am using a wet system with the super sniper stealth. Thanks for all the info! The maximum RPM should be set a few hundred RPM below your redline. Boy, they didn't disappoint. *Possible delays due to Covid-19 click for more information. Our Sniper EFI Master Kits are supplied with 20 feet of EFI compatible rubber hose. Note that these must be "enabled" to make a change, but once changed to "Unassigned" you can disable them. Remember that the TPS rarely goes to 100% (which is okay provided that the throttle is opening all the way) so setting the TPS trigger to 90% does not mean that you will lift by 10% for the ECU to determine that you are "pedaling" and shut off the nitrous. I just purchased the Holley sniper stealth 4500. Sniper EFI has a built in advanced boost control that will allow you turn up the boost as you please while … Holley Sniper EFI provides one of the best and most economical ways to update the performance and drivability of your classic truck. If you click on the small down-arrow to the right side of "Toolbox" on the navigation bar, you will see "Enable Nitrous". For tips on Transbrake setup, be sure to see my follow-on article on that. Very knowledgeable about the products they sell, always happy to talk you through your options and point you in the right direction. Do not ground the solenoids and input switches together at the same point. holley hp efi wiring diagram another image: holley bump box questions yellow bullet forums fast xfi wiring diagram wiring diagram info efi wiring diagram wiring diagram basic. I made a few adjustments as per your write up. Step 3. 1) Launch the Holley EFI software from the icon on your desktop. Chris Myer is a tremendous resource for info and questions. Was wondering if I could get some more info on the part of using the transbrake as a disable switch. Would the Accel 77110 distributor be an option or should I just look at a MSD tach drive distributor? In the window to the right you will see that Output #6 is being used by the A/C Shutdown configuration and Input #1 is being used by the IAC Kick configuration. Put an end to cold start issues, hesitations, vapor lock and poor throttle response. Select the model with options needed for your vehicle application. Introducing Holley Super Sniper EFI! The primary benefit of the Super Sniper with regard to nitrous use is that is that it allows nitrous setup in the Setup Wizard. I don't expect there would be any interference as long as the fuel pump is not connected to the Sniper. Any other tips on the dry install would be helpfull. Remember: it's not adequate to simply disable everything else that it using that input. For all standard applications, it is recommended to use a 3/8" fuel injection approved hose for your supply and return plumbing. Fuel Pump: On average, your block mounted mechanical pump will produce up to 10 psi of pressure. With the switch off, you should show zero volts. Holley offers a 650 HP four injector version for lower horsepower applications with a power adder or someone just needing additional sensor inputs. 3) Double-click on the Custom Calibrations (Cals) folder. So you're ready to switch from carburetor to fuel injection, but you're unsure of what all is involved. Once you have the Sniper Software operating on your MS Windows-based computer you can either save your current configuration to the SD card and then use the software to open that configuration or you can use the CAN-to-USB adapter harness to connect directly to your Sniper EFI System and download the configuration from the ECU into the software. The Sniper was developed to introduce enthusiasts to the use of nitrous at a very affordable price. This guide will walk you through a basic installation including what parts are necessary to swap as well as what to watch out for. The default frequency setting of 10 Hz is generally adequate for most solenoids. Thanks for the help. For this example I have chosen time-based progressive nitrous appliation. Sniper EFI is recommended, fuel pressure needs to be between 55-65 PSI. Let's get started! Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Connects directly to battery positive terminal - CONNECT LAST, Connects directly to battery negative terminal - CONNECT LAST, Engine Speed Input (ONLY FOR USE WITH COIL (-) IGNITION SETUP), Optional - Connect to aftermarket tachometer, Optional - Connect to Holley EFI Analog Gauges (using 554-130 Module), Optional - Used for programmable 0-5V sensor input, Optional - Used for programmable ground output. What's the best way to turn on the NOS fuel pump. 78 Malibu, 402 getting eddy heads and new cam, 5200 stall, th350, holley sniper EFI… Then click "Activate" at which point the display will expand to what you see below. Activation can still be based on the TPS position of your choice. After the initial configuration is complete you can then afjust the tune using the handheld controller. Looking at installing a Holley Sniper EFI unit on my 67 Corvette and interested in timing control. Note also that it is not adequate to simply disable these configurations because the Sniper software prevents any input or output from being used in two different configurations. My goal on this is to give you general overview of how you might wire the requisite switches and solenoid driver to establish a solid working nitrous oxide system controlled by your EFI System, and then provide pointers on configuration within the setup software. I'm glad you've found this helpful! This article was originally written to describe how to configure nitrous control into the Sniper EFI System. I would love to get your insights on what I've shared here. 459 26. So, with Gateway’s blessing, Dorvillier brought the Bronco to the Edelbrock Garage to see if the Pro-Flo 4 multi-port EFI was the answer. Fast shipping, great tech support. Matthew Lunsford from Holley is part of the team that developed the Sniper EFI system — he explains why the Sniper … I can get it to show in regular input only. Blow-through applications will require the use of an external boost referenced regulator (example: 12-848). First, I don't specify any nitrous hardware in the article. By setting this up as shown, the momentary switch that we wired will now be used as a secondary enable, meaning that in addition to arming the system with the toggle switch you would need to keep the momentary switch pressed anytime you want to spray nitrous. I don't get into selecting nozzles or calculating fuel requirements or pojected horsepower. Look for that soon! The Sniper Stealth 4150 EFI system from Holley features 4,100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications.