When choosing to upgrade your engine to modern fuel injection, look no further than Edelbrock’s Pro-Flo 4 EFI systems.
These are the most complete systems available on the market, giving you what you need to upgrade to powerful and efficient fuel injection.
SEE HOW IT WORKS
ELIMINATE COLD STARTS
With Pro-Flo 4 EFI’s computer controlled multi-port injection, hard starts are a
All Pro-Flo 4 EFI systems are warranted directly through Edelbrock for peace of
IMPROVED FUEL ECONOMY
Pro-Flo 4 EFI has the potential for improved fuel economy when upgrading from a
Pro-Flo 4 Electronic Fuel Injection 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. The E-Tuner 4 App is available to download for Android and Apple iOS powered devices.
WHY IS PRO-FLO 4 EFI BETTER THAN A THROTTLE BODY STYLE EFI SYSTEM?
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
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.
WHAT PEOPLE ARE SAYING
PAT MUSI - 1969 CHEVY CAMARO
“As one of the original proponents of EFI in high-horsepower applications, I’ve been eager to replace the carburetor on my ’69 Camaro. I won’t settle for anything but the best, and that’s the Edelbrock Pro-Flo 4 system. The installation was plug-and-play, and the self-learning ECU is already doing an amazing job after only a few short drives. The fuel rails and individual injectors provide such smooth drivability and effortless, instantaneous cold startup. The pre-loaded calibrations on the E-Tuner 4 app are great, and I really like the ability to adjust the system and monitor engine vitals right from a phone or tablet.”
JASON ENOCH - PICK UP TRUCK
“Looking to upgrade to EFI. The PF4 is a great kit. So easy to install and all the parts you need come with the kit. Being able to control my engine from a tablet or phone through an app is awesome. It really woke up my stock 350. Anyone looking to switch to EFI I would strongly recommend this kit.”
DYLAN DAVIS - 1969 CHEVY CAMARO
"The install of this kit was a breeze considering the entire manifold is already assembled and the harness is completely plug and play; an easy Sunday job over the fender. It was a shame this car sat for 5 years because I got tired of rebuilding the carburetor all the time. Now it fires right up no matter what the weather is like or how long it has sat. On top of that it idles perfectly, throttle response is amazing at any RPM, and gas mileage has increased dramatically. Pro Flo 4 has made my 1969 Camaro daily drivable which I would have never thought possible."
STEVE DAVIS - 1971 CHEVY CAMARO Z28
“I have a 1971 Z28 Camaro with a Chevy LQ4 that’s been stroked to 408 CI. The engine was carbureted before I switched to the Edelbrock fuel injection system. I was a little concerned because I have only installed one fuel injection system prior to this and it didn’t go as smooth as advertised. This system was exactly as advertised. I was able to install it in one afternoon and the wiring was truly plug and play. I removed the carburetor manifold and the injection manifold bolted right on with no modifications. I decided to go with a new fuel tank made for fuel injection so that delayed the install slightly. This system had the small computer included so the start up procedure went smooth and the self tuning worked exactly as advertised. So far the throttle response is amazing and I have noticed a significant increase in fuel mileage. I would strongly recommend this system to anyone looking to go from a carburetor to fuel infection.”
DON PRIETO - 1956 CHEVY NOMAD
“My 1956 Chevrolet Nomad runs like a modern day EFI vehicle. I often travel to NHRA Cackle Fest events around California and use the Nomad as a push Vehicle for my vintage dragster.The car is great to travel in and runs great in all conditions. I highly recomend Edelbrock Pro Flo 4 EFI.”
ART ESPARZA - SAND RAIL
“Decided to up grade my Fuel injection system with Edelbrock Pro 4 EFI. I had great performance with the PF1 but this new system was so much better. The new system was much cleaner and easier to install, the new wireless phone and tablet set-up screens and analog viewing was the best. I thought maybe it would be tough especially because I wasn’t putting it on a street car but on a full tube chase rock crawler, to my amazement it really woke up my motor. Took it testing to Johnson Valley Ca. and it ran awesome out of the box up and down the rocks and hauled through the desert flat sections. Also had great support from the Edelbrock team. Thanks to Mark and Curt, Mark for meeting me out there and going for a ride. Off-roaders it works!”