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Ok, any decent course is going to require a few texts. The good news is that these don't cost you anything! If you don't already have them, Please download the following PDF files:
I figured we would start our review with the Quickstart Manual and then go into details later in the full Installation Manual. A few things caught my eye here that I would point out. I'm not trying to re-write the manual, just pointing out a few things that catch my eye.
"Engine is a naturally aspirated (no supercharger, turbocharger, etc.) V8". Ok, the reasoning on the "no boosting allowed" requirement is simple: The Sniper's MAP is only set up for atmospheric pressure. If you bought this system and had plans to boost it then it is absolutely not going to work. The Terminator EFI can conceivably work, but that is because a professional EFI tuner can attach a laptop and the Holley EFI software and make the necessary adjustments (after upgrading the 1-bar MAP sensor, of course.)
I suppose the "V8 only" should not be surprising. After all, the Terminator has the same limitation (assuming you want to use the Startup Wizard functionality.) Don't buy this system if you had your heart set on putting it on your 6 cylinder engine. You're going to need to opt for the Terminator and have it custom programmed for 6 cylinders.
"Factory dual plane intakes will require an adapter (PN 17-6)" - I wrote a piece a while back that suggested that the Terminator required a spacer if used on a dual-plane manifold. That elicited a phone call from Holley Engineering who explained I was absolutely wrong about that. Rather than set myself up for another phone call, I'll just say that sometimes enhanced performance can be gained by adding an air gap to a dual-plane manifold (regardless of the fuel induction system.) However, I'm not sure why they are recommending a square- to spread-bore adapter. I would instead humbly suggest a standard spacer, or grinding an air gap into the center of the dual plane flange mating surface. Not because the Sniper needs it. Just saying.
"Holley strongly recommends an in-tank pump". Okay, I kind of have to chuckle at this one. The Sniper Master Kit includes an inline fuel pump. Don't get too wrapped up on this one. Yes, an inline is going to make a little more noise. It's also far easier to install. Worst case, use a good Walbro 255 LPH inline fuel pump to get the system running, and then install it in the fuel tank later if it's too loud for you.
Like it's higher-end predecessors, the Sniper EFI system can control ignition timing. That is a great thing because it really goes a long way in making engines with long-duration cams behave well at idle. We echo Holley's recommendation to first start the engine without Ignition Timing Control. While it is absolutely advantageous to allow the Sniper to control timing, first get the engine running with the existing ignition system (assuming you have a working ignition system.) Adding the ignition is not rocket science, but why complicate matters?
Sniper Ignition Setup without Timing Control: Here you are simply providing an RPM signal so that the Sniper can accurately fuel the engine. This signal can come from either of two sources. If you have an capacative-discharge box that has a tach-out signal on it, then that is the way to go. The Sniper kit includes a purple wire that allows you to connect to the tach out terminal on the CD box and plug directly into the crank signal harness on the Sniper. In the event you only have a coil and distributor, no problem. Connect the yellow-wire on the 7-pin connector from the Sniper to the Coil (-). Choose one of these methods initially.
Choose from ONE of these setups. NEVER HOOK TO COIL(-) WHEN USING A CAPACITIVE DISCHARGE IGNITION BOX!
Sniper Ignition Setup with Timing Control: Once you are up and running then press on for timing control. There are two ways to go here. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. A straight-forward setup process is detailed in the full installation manual. For best results, use the optional Dual-Sync Distributor to Sniper EFI Connector Harness.
If you have a GM or Ford application and already have an MSD magnetic distributor, Option 2 is a good choice. In this option, you replace the existing rotor with the MSD 84211 Rotor Phasing Kit. By locking out the mechanical and vacuum advance and adding this inexpensive kit, you allow the Sniper to control the timing. There are quite a few steps to correctly installing the ECU-controlled timing setup using the rotor phasing kit but the end result is a top-notch computer-controlled ignition for a very reasonable price.
An ignition coil driver (Holley Internal PN 271R1165A, PN 556-150) is included in the Sniper kit and is required to run the Sniper with timing control if no MSD ignition box is used. (The MSD ignition box acts as the coil driver when implemeting timing control.) It is noteworthy that timing control is only possiblle with an external coil. If you have an MSD GM Small Cap HEI distributor you will need to replace that with a distributor that uses an external distributor. To my knowledge, it is not possible to use a factory GM small cap HEI distributor with the Sniper doing timing control.
One of the "value added" features of buying here at HolleyInjection.Com is that we are going to have a technician speak with each buyer (or hir or her mechanic) to identify any additional components that might be required for the installation. We want to make sure that when you get your system that you're not having to do a bunch more shopping before you can start the installation. The fuel system is a good example of this.
The easiest answer on the fuel system is to buy the Sniper with the Master Kit, which includes pump, hose, fittings, filters, and fuel bulkhead. But sometimes that is not practical and that's where we want to help you engineer your system. Maybe you want an in-tank fuel pump--in some cases this is a fairly easy option. Or maybe you have the fuel pump already and simply need some other components. We keep in stock and offer all of the fuel system components "ala carte", wo we can get you exactly what you need.
The Sniper has -6 AN male inlet and return fittings. This is an excellent feature because you can plumb with -6 AN hose ends or we have adapters for nearly any sort of connector you might want to use. In general we recommend 3/8 inch hose barbs and EFI-rated fuel hose. This is fully adequate, completely safe, and the lowest cost option. Of course, nothing is quite as sexy as a full-up AN-plumbed engine, but the cost goes up dramatically. Let us help you source whatever fits your budget and your taste.
Ok, as I said at the top, this course is going to be a work in progress (and that's all the progress I can make today!) I will gladly address your points of concern--just add them below!