Holley How To: Install Sniper EFI

Well, by now I'm sure you've all heard of Hollies' new

sniper

EFI system. Today we brought in the 67 Camaro to show you how easy it is to

install

, but first let's take a look at what comes in the kit. This is what you can expect when your new

sniper

and EFI kit arrives, the first thing you will find is a getting started guide and detailed instructions to guide you step by step through the

install

ation and start a process. Then you will find the sniper throttle body with for 100 pound per hour injectors, it can handle up to 650 naturally aspirated horsepower and if you look closely you will see the ECU built in, this eliminates the need to mount external boxes.

You'll also notice the serviceable throttle position sensor. In addition to an idle air control motor, the throttle body also houses a built-in fuel pressure regulator that is preset at 58.5 psi. The three-and-a-half-inch full-color touchscreen makes it easy to navigate the jump start assistant and monitor engine parameters to which it connects directly. The cam bus connector is located on the Sniper EFI throttle body. A Bosch wideband O2 sensor allows the Sniper's EFI to learn as you drive. There is a main power harness that plugs directly into the seven pin connector and contains the four wires needed to get your sniper.

EFI running as well as a dedicated fuel pump wire powered by our 40 amp relay, the 10 pin auxiliary harness is used to control the programmable inputs and outputs as well as when connecting a coil controller or CDI box to the system. The coolant temperature sensor provides the Sniper ECU with vital information about engine operating temperatures and is solderless. Oh to flange with stainless steel clamps makes oxygen sensor installation a breeze. Also included in the kit is a carburetor base gasket and air filter housing. gasket and if you need some extra small parts, we have put together a great accessory kit part number 5 - 0 - 1 that contains many of the common items you may need to complete your installation.

We also offer a variety of throttle and transmission cable brackets to fit the most popular applications Now that we are familiar with the components included in the Sniper EFI kit, let's go ahead and begin the installation. Remember that safety comes first whenever you do any work on your electrical system, it is always best. To remove the negative battery terminal before continuing, we can now begin removing the carburetor. It's always a good idea to go ahead and label all vacuum lines before you get too far in this application. We will only use the PCV valve and vacuum advance. for the dealer, go ahead and check them now.

You can then go ahead and remove the throttle linkage, as well as the return spring, and set them aside for safekeeping. You should also go ahead and disconnect the fuel line. Be sure to use a rag to collect excess fuel before removing it. I went ahead and removed the four nuts from the carburetor bolts. Now we are ready to take it out. Be careful when lifting it so as not to spill fuel. I removed the old carburetor and spacer, now you can install the new gaskets supplied in the kit and now we are ready to install the throttle body.

Make sure you don't pinch any wires when you install it in the entrance. Now you can. Attach the throttle body to the intake using the bolts, washers and nuts found in your kit. I went ahead and drained some of the coolant so I could replace the coolant temperature sensor or cts with the one provided in the kit. This sensor lets the ECU know when the engine has reached an operating temperature of at least 160 degrees Fahrenheit by activating learning mode. There are several places you can install your temperature sensor depending on the make and model of your engine in this small block Chevy.

I decide to go to the passenger side. cylinder head to install ours, the sensor comes with a seal and I already applied it previously, but since the OEM sensor was a larger diameter than the replacement one, I will have to use this bushing and some PTFE to seal it now that the cts is installed. We can go ahead and work on our throttle linkage. Every scenario is different, which is why the sniper kit includes a variety of mounting bolts. Check out our instructional videos on the Holley Performance YouTube channel for more tips and tricks on connecting throttle linkages.

Don't forget to reconnect the vacuum lines and throttle return spring when you are finished installing the oxygen sensor. It should be mounted as close to the engine as possible, but after all cylinders have been fused, this holds true whether you are using a manifold or header for installation, if you use a long tube header it should be mounted at least 1 to 10 inches after the manifold flange. Make sure you have at least 18 inches of exhaust after the O2 sensor. In this case, we have a complete collector. exhaust so we don't have to worry about it, our sniper kit includes this handy stylish stainless steel clamp.

Oh, to cover it up, it also includes a high-temperature gasket and quality clamps to seal it all together. First we need to find a suitable riding location. The O2 sensor be sure to mount it in a position that is at least 10 degrees up from horizontal, this prevents condensation from building up on the tip of the sensor, which can hit and damage the O2 sensor upon startup once it is installed. You have found the location you can take. a marker and outline the hole next you need to take an awl to start punching. You can use a 3/4 inch drill bit or a step drill bit to help you enlarge the pilot hole, go ahead and attach the gasket and stainless steel.

Tighten them lightly install the wideband O2 sensor that is included in your kit. Make sure the O2 sensor does not interfere with the transmission line. If everything looks good, you can go ahead and tighten everything. Connect the O2 sensor to the throttle body and secure. the wires to avoid contact with moving parts and high heat areas now that we have the oxygen sensor installed. I would like to show you how simple it is to connect the sniper EFI. There are only four connections you will have to make the battery positive. Battery negative, a switch, a 12 volt ignition source and the coil input.

One of the most common mistakes we find is the fact that people do not read the instructions carefully. The power cable and the negative cable found in the wiring harness should be connected directly to the positive and negative terminals of the battery, never too far into the cut-off switch box or fuse panel, you will need to take some time and plan the routing of your wiring harness, be sure to avoid high heat areas like the exhaust and make sure you have plenty of lengths of wires to make your connections, the first thing you will need to do is connect the main wiring harness to the corresponding connector that comes from the throttle body on this car.

We wanted to retain the original factory battery cable terminals to maintain an original look, so I purchased a dual terminal style battery that will allow me to use the OEM terminals on the top but gives me a dedicated connection on the side post for power and ground from the sniper wiring harness. Strip the wire and install an electrical terminal. that is appropriate for the size bolt you are using. The heat shrink style terminals are excellent and create a tight seal to protect against corrosion. Use the heat gun to shrink the protective layer on the terminals. Do this with both red and black.

The cables continue and connect the positive power cable directly to the battery, but do not connect the negative yet. Next, they must find a dedicated 12-volt ignition source to connect the pink wire to. Now I'll show you how to do this. I found a clean ignition source right here in the factory fuse panel. Check this by plugging in a test light and turning the power switch between the on and off positions. It's a good idea to go ahead and take it a step further and check that you have 12 volts. During the booting process do this using a multimeter by setting it to DC voltage mode, connect the wires and check the voltage in the run position, it should read about 12 volts.

Now check the voltage again while cranking the engine, there should be around 9 to 10 volts while cranking due to the extra load on the starter motor. I have just over 10 volts, so this should be a good place to plug in my pink wire while I'm here under the dash. I'm going to go ahead and get the can bus going. cable from our three and a half inch touch screen through the firewall and into the engine compartment so we can make the connection to the cable coming from the throttle body. Be sure to use rubber washers to protect the cables from damage.

The blue wire. it is for your fuel pump, it has a built in 40 amp relay to directly power the pump, go ahead and reconnect it to the fuel pump, now making sure to avoid heat and sharp edges once you are done running the wires and carry out the appropriate operations. connections, be sure to go back and secure them properly with zip ties or insulated clamps if you are using a stock mechanical advance distributor with inductive ignition coil, simply connect the yellow coil on the sniper plet wire to the negative terminal of your coil. If you are using a large cap HEI style distributor, the yellow coil input wire should be connected to the tachometer terminal located on the side of the distributor cap.

For this build we decided to go ahead and upgrade our ignition system, the halls double sink distributor. The hall distributor connects to our wiring harness using the optional adapter part number five five eight dash four nine three Since we would also like to control the ignition timing we will go ahead and plug in the included coil driver module for instructions detailed instructions on wiring and installation. the hall or MSD Pro built dual sink distributors as well as a hyper spark ignition system installation visit our website at

holley

calm now that we have our sniper throttle body installed we made all the electrical connections and installed our O2 sensor, we can concentrate.

Our Fuel System Efforts When it comes to installing the fuel system for the Sniper EFI, there are many options, but they have always made it easier with their master fuel kits, part number five twenty six seven and five twenty six eight. I was lucky when it arrived. On this Camaro there is a lot of room between the fuel tank and the rear differential cover, so I made this bracket to mount all my components; However, you may not be so lucky and you may have to get a little creative Next, we will need to connect the supply line that runs from the fuel tank to the pre-filter inlet, don't forget to secure it with an EFI rated clamp.

Now we can connect the supply line that feeds our throttle body to the after filter outlet and secure it with another EFI clamp, be sure to protect your fuel lines from any abrasion or sharp areas that could cause a fuel leak and move them away from areas high heat while we are here. I went ahead and ran the wires to the fuel pump, the blue one. It comes from the main wiring harness which is in the engine bay and the black one is on a good ground. We can make the connection on the fuel pump now and finish the installation if there is not enough clearance between the tank and the differential, another possible location for the fuel pump is right here on the frame rail, just remember that the pump must Mount lower and as close to the fuel tank as possible for best performance and life.

Our Holloway inline pumps like this 12 - 600 unit fit great and provide a clean look if you want to take advantage of the benefits of an in tank fuel pump, our Muscle Car style EFI pumps are perfect, they fit into your stock fuel tank and put in a factory fuel sending unit. Another excellent alternative is to replace your fuel. tank with one of our new Sniper EFI conversion tanks the tanks come complete with a pair of tank straps fuel level sending unit fuel level float mounting gaskets and hardware for the pump and sanding unit complete detailed instructions the fuel pump module bracket and the fuel pump in the tank filter sock, an anti-tilt valve and clamps and flanges forMount the pump if you have a custom fuel tank or there is no replacement option available for your particular vehicle.

The new Hollies insert module is a great way to add fuel to the tank pump into your existing fuel system once you have connected and connected the fuel system you will need to install a fuel return line from the engine bay to the fuel tank. Here are some good ideas on how to do this. The first option obviously installs directly into your fuel tank. Now to do this you will have to remove the fuel tank from the vehicle and then you will have to have a professional clean it completely that way there is no risk of explosion.

The second option is to install it on the fuel sending unit, most of these are removable and have enough space, just make sure you don't obstruct anything at the back and have enough room to tighten the nuts. The third option is to install it in the fuel sending unit. the fuel filler neck itself, most of them are removable so there is no risk of explosion, plus it can prevent all the chips from entering the fuel tank, just drill a hole making sure you can access it through the back part with a wrench and install it. The fuel filler neck itself is that easy if you don't have space or just don't want to install a return line from the engine bay to the fuel tank.

Holley has a solution for you: it's our filter. regulator can dramatically shorten your return line has a replaceable filter element and a built-in fuel pressure regulator that is preset at 58.5 PSI this is what a typical installation will look like using our Holley filter regulator. Note that there is only one supply line and the short and return line, this eliminates the need for a regulator in the engine compartment, plus there is one less filter to purchase and mount. If you are using one of the Holley filter regulators in your setup, you can install a cap on the fuel pressure connector. regulator on the throttle body Next we need to supply power to our fuel pump, connect the blue fuel pump wire that comes from the sniper wiring harness directly to the positive side of the fuel pump.

You also need to make a connection from the negative side of the fuel pump, either directly to the negative battery terminal or to a good clean chassis ground. we can work on the fuel connections to our sniper throttle body here in the engine bay. We'll need to run a supply and return line from our fuel tank at the back of the car to our sniper throttle body here in the engine bay. We recommend that you use a fuel line with at least a 3/8 inch ID for the supply line and a 5/16 ID for the return. There are three end options on the sniper throttle body that you can connect your supply lines to, but it is important that the return line is only connected to dash connector six which is located on the fuel pressure regulator before Before we can connect our supply line to the throttle body, you will need to flush the system.

I find it easier if you leave some extra hose and run it. directly into a suitable container of gasoline, flushing the supply line prevents debris from clogging the injectors, causing bad starts, rough idling, poor performance and even injector failure will return before starting and ending our connection in the throttle body, first let's reconnect both negative cables to our battery. then I will guide you step by step through the start wizard, turn the ignition switch to the run position but do not start the engine yet from the sniper home screen, select and press the wizard icon, then you will need to select a part . number for the Sniper EFI system you are using, then select the appropriate number of cylinders for your engine.

Now, using the cursor and arrow tabs, select the displacement in cubic inches of your engine and then click Next. Next, you will need to select the target idle speed. Since this car has four speeds, I'll select 750 rpm for a target idle. The next step is to select the cam type from the three options shown on the original street and race. This is an original engine, so we will select the original one. soft icon and click next sniper Fi is capable of nitrous control but we won't be running it on this engine so I'll select none and then the wizard needs to know what kind of ignition system we plan to run if you run it on a Hei or coil For original inductive style, you will need to choose the negative coil option.

Sync control is not available with this option. If your ignition system includes a CDI box, such as an MSD or throttle unit, you will need to select the CD box option. EFI is capable of controlling ignition timing when using a magnetic style distributor such as an MSD unit or if you install a Hall Effect distributor such as the Holley Dual Sink or MSD Pro Billet Dual Timing, the setup process for magnetic distributors and Dual Timing is Another identical option to control the timing of the Nishan with your Sniper EFI is to use our hyper spark ignition system.

We have a tab to guide you through installing Hyper Spark as I will be installing a Holley Dual Sync in this setup. I'm going to select the Dual Sync Distributor and walk you through the setup process. Now we need to select the total amount of ignition timing at wide open throttle. I'm going to stay on the conservative side with this engine and select 32 degrees of total timing and then click Next. You can select the start icon and it was going to start creating the calibration based on the information we just gave you. When you see the pop-up message, turn the ignition key to the off position for four to five seconds and then turn the key back to the run position. position to complete the installation when you turn the key to the run position you should hear the fuel pump turn on for approximately five seconds.

Remember that we put a return line into an empty fuel jug to collect any contaminants. Go ahead and cycle the key another two. three times that way we can make sure we have completely flushed the fuel system. Now we can remove the excess holes from the gas can and go ahead and cut it to the proper length. Now that we have the fuel system completely flushed, we can continue. Go ahead and complete our connection to the throttle body use the supplied fitting and install it on the hose tighten the clamp and make the connection on the throttle body don't forget to tighten the fitting when you are done now we will need to perform the sensor check on the handheld device Before starting the engine you will need to check that all the sensors are working properly to do this, turn the key to the run position and listen to the fuel pump from the home screen select monitor then monitors. icon you will now need to select the initial start.

This will display a screen showing all sensor readings. The engine rpm must be stopped since we are not running. The throttle position sensor should be at zero if you slowly press the throttle all the way open. You should get a reading between 85 and 100 percent. If your reading is less than 85 percent, you will need to correct any problems that are preventing full travel of the throttle linkage before continuing. your MAP sensor should read between 95 and 100 - kPa, higher elevations can cause the reading to be as low as 75 kPa, the coolant temperature sensor should read the ambient air temperature around your engine, ours is 81 to 82 degrees, the lockup we will need to fix this after the engine warms up if any of the sensors are not reading correctly, you must resolve the issue before you start the engine while you still have your handheld on the screen. initial start.

Go ahead and start the engine, but watch the RPM, it should say "sinking" and the engine should start if there is no rpm signal. You have an error in your wiring or system configuration. If the engine starts but idles too low, it may be necessary to open the idle screw slightly until it idles on its own. Continue and let the engine run until it reaches normal speed. operating temperature above 160 degrees Fahrenheit, it is a good time to recheck for coolant or fuel leaks. Now, if you are timing your sniper, you will first need to perform a static timing check using the touch screen and a timing light.

To lock static sync, do this by selecting the tuning icon on your home screen, select system, then static sync, now slide the cursor to 15 degrees and click set, check that you have 15 degrees sync before the top dead center on your harmonic balancer with a synchronization. Comes on if the balancer does not read 15 degrees before top dead center, a distributor may need to be loosened and adjusted accordingly. Don't forget to tighten it again when you're done, once you've verified you have 15 degrees of timing continue. and click clear on the handheld this completes the static timing check process and the sniper ECU is now controlling the timing once your engine has reached an operating temperature of at least 160 degrees we can continue and set the idle speed to the RPM we selected in To do this, you will need to select the multi-meter icon on the monitor and then the sensors icon on the home screen with the vehicle in neutral and the parking brake applied.

Adjust the idle screw closed or open until the lock reads between 2 and 10 percent. If your TPS reading exceeds 0% after the procedure is complete, you will need to turn the ignition switch off and on again to reset the TPS to 0, since the Sniper EFI is the same height as the carburetor we already removed, there shouldn't be any hidden clearance issues, in fact in most cases you can reuse the factory air filter if you have any clearance issues. interference with air filter base and sniper throttle body. We offer an optional base part number 120 - 510. It is a 14 inch base plate specially designed to fit the contours of the Sniper throttle body with Sniper EFI, we were able to keep the old school look, but now we have all the EFI benefits hidden right under the air filter.

Congratulations, you have just installed your new sniper EFI system. All this remains. What you need to do now is simply take the vehicle for a spin and tune the sniper cell. See a quick start guide and follow the instructions in the first driving section. To perform the initial autotune operation, it is always best to perform the initial drive in an area that does not have much traffic that way, you can vary the engine load accordingly. It's also a good idea to have a friend with you so they can monitor the gauges while you focus on driving.

Thanks for watching to see more instructional videos or to learn more. information about sniper efi visit our website at

holley

calm you