Edelbrock Pro-Flo 4 EFI Systems

Pro-Flo 4 EFI Systems by Edelbrock
Edelbrock pioneered the aftermarket EFI industry with the first system in 1979. Every generation of Pro-Flo Electronic Fuel Injection since, has continued to deliver the performance you want. We are excited to announce the latest edition - Pro-Flo 4. Pro-Flo 4 has expanded to include NEW kits for popular Chevy LS models, and has also been improved with the latest technology and features. Most of these advancements are in the all-new ECU, which features a faster processor, a water proof design and measures half the depth of the previous ECU. It also has an upgraded Bluetooth chip that is faster, more reliable and will not drop connection. Finally, we've added more features for the advanced tuner giving you control over cold starts and acceleration, while retaining the simplicity Pro-Flo is known for and proven to deliver.

Pro-Flo 4 does not require laptop tuning. The key to the system is our exclusive E-Tuner 4 application with base calibrations that have been developed on our dyno. The E-Tuner 4 app uses a Bluetooth wireless connection to communicate with the ECU's self-learning capability to continually adjust the calibration to get the maximize performance of your engine. E-Tuner 4 features a simple and easy to use setup wizard to help you get started. Best of all, the E-Tuner 4 app is free and can be downloaded from the Google Play Store, allowing you to use your personal Android based smart phone or tablet. If you don't have a compatible device, then we also offer kits that include a 7" Android tablet with the E-Tuner 4 app pre-installed.

Another great feature of Pro-Flo 4 is the ability to control both fuel and spark from the E-Tuner 4 app. E-Tuner 4 app gives you complete control of the system with the ability to adjust air-fuel ratios, ignition curve, idle speed, acceleration fuel, coolant fans, Rev limiter and much more. Multiple dash displays are included to allow you to monitor engine vitals and performance from your Android smart phone or tablet.

    Features Include:
  • Easy to use self-learning system that will continually improve engine performance as the vehicle is driven and compensates for altitude and weather changes
  • Fully sequential port fuel injection system that delivers a smoother idle, great throttle response, improved peak power and the potential for improved fuel economy
  • Ready to run right-out-of-the-box with pre-loaded calibrations - No laptop or tuning experience required
  • Supports up to 800 horsepower
  • Internal fuel pump driver, no extra relay or wiring required
  • Multiple high impedance fuel injector options...
    - 29 lb/hr for small cid engines that support up to 450 hp
    - 35 lb/hr for engines that support up to 550 hp
    - 42 lb/hr for engines that support up to 650 hp
    - 60 lb/hr for engines that support 775+ hp
  • Fully terminated high-quality harnesses manufactured in the USA with clearly labeled connections to ensure a hassle-free installation
  • Easily adjust your ignition curve specifically for your engine setup, eliminating the hassle, complexity and limitations of the standard distributor advance mechanism
  • Industry leading dedicated support staff available to answer your questions - online EFI Tech forum available 24/7
  • All new low profile compact weather-proof ECU integrates the latest CPU micro-controller and intelligent sensors, providing the latest in engine control technology
  • All kits include a plug and play single connection distributor designed to work specifically with Pro-Flo 4 - No complicated distributor conversions, rotor phasing, CDI box or added expense of purchasing a distributor
  • High-quality performance intake manifold designed, cast and machined in the USA
  • Now available for Gen III and Gen IV 24x and 58x LS applications (cable driven throttle applications only)
  • Choice of return-style or the Universal Fuel Sump for your fuel system (sold separately)
  • Recommend Rail-Mounted Fuel Pressure Regulator #17400 for return-style fuel systems (sold separately)
  • Your choice of an Edelbrock single-plane intake manifold with 1000 cfm 4150-style throttle body or the Pro-Flo XT intake with single front mount 1100 cfm 90mm throttle body

Performance E-Street® 2 EFI Systems by Edelbrock THE MOST ADVANCED EFI TECHNOLOGY ON THE MARKET

Edelbrock's Pro-Flo 4 fuel injection systems utilize the latest in Bluetooth Mobile Technology - all tuning related functions can be done on your Android smart phone or tablet with the Edelbrock E-Tuner 4 App. The E-Tuner 4 App features an easy to use setup wizard to guide you through the setup process for your specific engine package. E-Tuner 4 App also includes page specific help files for assistance if needed.

Pro-Flo 4 also gives you the ultimate control of your engine when using the Advanced Tuning features. These features give you the ability to easily adjust your ignition curve specifically for your engine setup, eliminating the hassle, complexity and limitations of the standard distributor advance mechanism. This type of control will result in a smoother idle, faster acceleration, better peak power, improved fuel economy and the ability to control detonation, all with the touch of your finger in the E-Tuner 4 app.

Throttle Body style EFI systems feature fuel rails and injectors mounted directly to a throttle body. This design delivers the fuel into the air flow stream in the plenum similar to a carburetor. It's the most universal type of Electronic Fuel Injection system, but it's not ideal for high performance engines. Mixing fuel this way allows for it to puddle and condense in the plenum of the intake manifold, a recipe for hard cold starts. Another drawback is the delayed throttle response since the fuel must travel through the intake manifold to the combustion chamber. This can also cause the air/fuel mixture to separate as it flows to the cylinders, resulting in an uneven mixture between cylinders. Typically, the center cylinders run slightly richer than the outer cylinders, hindering tuning for peak fuel economy and peak performance. The OEM's only utilized throttle body style injection for 9 years before transitioning to sequential port fuel injection for improved drivability and efficiency.

Pro-Flo 4 EFI systems feature a high performance Edelbrock intake manifold with a 1,000 cfm throttle body, fuel rails and individual injectors for each cylinder. Key to the improved performance of a system like this is the fuel injector location, which is at the end of the runner on the intake manifold right before the air flow stream enters the combustion chamber. This location provides a more efficient mixture control thats unaffected by varying intake manifold runner temperatures and length. The fuel injector is also timed with the intake valve opening, giving the ultimate control and is the most efficient way to deliver fuel into your engine. This design produces the best fuel atomization and precise distribution to each cylinder for the ultimate performance.

Pro-Flo 4 EFI vs Throttle Body EFI

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Installation Instructions for EFI