![]() ![]() Fortunately, Edelbrock offers kits with all the parts you need to upgrade your fuel system for the new EFI system. You will need to upgrade your fuel pump and lines to deliver the fuel the injectors need. When installing an EFI conversion, keep in mind that fuel injectors need higher fuel pressure than carburetors. From there, you can fine tune the settings manually, or let the self learning system do most of the work. The built-in wizard lets you set up a base map in minutes. That means you can monitor your engine and make adjustments when you’re driving your vehicle, or you’re standing in front of the engine bay. The ECU has Bluetooth, so you don’t need to run a cable between it and your smartphone or tablet. You can alter the fuel map and other parameters using Edelbrock’s E-Tuner 4 app for Android. This also lets the system adjust to changes in altitude, so your engine will always run great, even when you’re driving on mountain roads. Using this information, it can adjust fuel and spark to keep a steady air/fuel ratio and prevent knocking. Self learning EFI like Edelbrock’s Pro-Flo 4 gathers data from multiple points, including the MAP sensor and wide band oxygen sensor. When buying an Edelbrock EFI kit, you have a choice of getting it with or without a distributor. Turn cooling fans on and off based on coolant temperature. It’s up to you to decide how it is used:Ĭontrol the amount of fuel sprayed by the injectors based on several factors including rpm, air flow, and exhaust oxygen levels.Ĭontrol the ignition curve using an Edelbrock distributor. The ECU included in each fuel injection kit can handle several engine control systems. This results in lower fuel consumption and more power than competing systems. This placement also improves atomization, helping the fuel burn in the combustion chamber. While fuel delivery using throttle body EFI is uneven, port injection delivers fuel directly to each cylinder, maintaining a steady air fuel mixture across your engine. Since the introduction of the Pro Flo 1 in 1992, these EFI systems have used a multi-port injection system with injectors at the ends of the manifold next to the intake valve. They make pre-built kits with simple wiring and a combination of pre-programmed maps and self learning capabilities, so you don’t have to be a rocket scientist to use one.Įdelbrock was first to market with an EFI system in 1979. With an Edelbrock electronic fuel injection (EFI) system, making the switch to EFI is straightforward. Installing an EFI kit will give your engine better throttle response, more power, better fuel economy, and more tunability. Pulse width control of each injector improves performance over multiport injection.Whether you’re building a modern engine or reviving classic iron, you don’t have to be stuck using a carburetor. The ECM controls the injectors by pulse width, the length of time the injector sprays fuel into the port. Most of today's engines have sequential fuel injection systems. This system is more efficient than a multiport system because changes to the fuel mixture are instantaneous. Sequential fuel injection systems fire each injector individually. Due to its design, a problem with one driver will cause a misfire in more than one cylinder. The fuel charge in some cylinders momentarily sits, but engines rotate so quickly the delay is negligible. A six-cylinder engine would fire three injectors on the first revolution and then fire the other three on the next. A four-cylinder engine may fire the #1 and the #3 injectors on the first crankshaft revolution and then fire the #2 and #4 on the second revolution. An independent injection system (in which fuel is injected once into each cylinder for each two revolution of the crankshaft) is used. Multiport injection systems fire the injectors in groups. SFI Sequential Multiport Fuel Injection System Last Updated on Thu, Toyota RAV4 Car Features An L-type SFI system directly detects the intake air mass with a hot wire type mass air flow meter. However, there is a difference in the way these systems operate. Multiport and sequential fuel injection systems both inject atomized fuel into a port just before the intake valve. ![]()
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