Imagine being able to park your Mustang's drippy, persnickety carburetor on the shelf and have cleaner, more efficient fuel injection without anyone knowing it's there. Think we're shrink-wrapped? Read on.
Professional Products has been producing its Powerjection fuel atomizing system for quite some time now. And with each generation, it has only gotten better. The original version had a separate ECM (electronic control module), which typically meant boring and drilling holes for mounting. It was hard to hide the first generation Powerjection despite its status as a great system.
With Professional Products'...
With Professional Products' Powerjection III, you can hard line your fuel system, which is suggested, or use the provided braided hose. The fuel pressure regulator wouldn't clear our 351C-4V application, which called for relocation to the right-hand shock tower where it couldn't be seen. Stock hard line is available from Classic Tube.
Powerjection III is a dream come true for those of you interested in upgrading to electronic fuel injection. It hides beneath the factory air cleaner. Unless you have an open element air cleaner, it cannot be detected.
Powerjection III is also self-contained. When we opened the box, we were looking for the ECM-the computer that makes this thing work. We almost called them to ask where it was. We were stunned to learn that the microprocessor is located on the throttle body. It's so small it fits in the palm of your hand. Professional Products calls it the Engine Management System, which includes the microprocessor, throttle position sensor, manifold air pressure sensor, and idle air control.
Challenges with this system are easy to overcome. You've got to install an oxygen sensor in one of the exhaust pipes close to the manifold outlet. That's easy, and you won't need a welder. If you have an open element Hi-Po air cleaner, people will see your Powerjection III system. However, it looks like a high-performance carburetor. You will need to run a fuel injection return line to your fuel tank, which is also easy, especially if your Mustang has a fuel tank drain plug.
The magic of Powerjection...
The magic of Powerjection III is its integrated microprocessor, MAP sensor, and throttle position sensor. Vacuum hose is for the MAP (manifold air pressure) sensor. Throttle position sensor is visible, fed with three wires. The fuel pressure regulator controls fuel return flow to the tank; it can be located here as shown or between the throttle body and tank.
Once installed, you will be amazed at how well Powerjection III performs. Because it is self-adapting, it adapts to both your Mustang's engine and your driving technique. Suggested retail price is $1,815 (#70026) via the Retrotek Speed website at www.retrotekspeed.com.
Powerjection III
So sophisticated it's simple, Powerjection III is an education in downsizing in a good way. It looks like a high-performance dual-feed carburetor, yet it's a simple four-bore, four-injector package - modern technology designed for vintage automobiles of all types with a Holley 4150/4160 baseplate pattern.
Here's what makes Powerjection III so terrific:
- Completely self-contained fuel/air delivery and electronics.
- No clumsy wiring looms and connections.
- Adaptive technology, which means Powerjection III adapts to your Mustang's engine as you drive. You don't have to be a computer programmer.
- If hands-on tuning is important to you, Powerjection III has a laptop connection.
- Dual-feed package looks like a carburetor.
- Strap-on O2 sensor and bung. No welding.
- Easy-to-change fuel filter requires no special tools.
- In-line fuel pump hides above rear axle and tank.
- Fuel pressure regulator locates at throttle body or hidden at return line underneath.
- Use existing Mustang fuel lines (steel) or go with braided hoses provided by Professional Products.
- Software and detailed instructions included with kit.
- For applications up to 550hp.
| Powerjection III Choices |
| #70020 | Basic Kit with Satin Finish |
| #70021 | Basic Kit with Polished Finish |
| #70026 | Complete Kit with Satin Finish |
| #70027 | Complete Kit with Polished Finish |
| #70107 | P3 Fuel Delivery and Return Line Kit |
Basic Kit includes throttle body, O2 sensor and mounting parts, coolant temperature sensor, gasket, instructions, and hardware. Complete kit adds pump, filter, and regulator.
Technician Gil Roiz of Mustangs...
Technician Gil Roiz of Mustangs Etc. removes this '70 Mach 1's four-barrel carburetor. When we ordered our Powerjection III kit, the plan was to install it on a Mustang with a 289, so our kit is for a 260/289/302/351W. We decided to install Powerjection III on a '70 Mach 1 with the 351C-4V, which threw us only two curve balls: the fuel pressure regulator had to be relocated to the right-hand shock tower and the coolant temperature sensor had to be located in the heater hose instead of intake manifold.
With the carburetor removed,...
With the carburetor removed, our 4150/4160 foundation becomes visible. Powerjection III installs right on top of this classic Offy Dual-Port, dual-plane manifold.
A test-fit determines if spacers...
A test-fit determines if spacers are needed between the throttle body and intake manifold. This is always a good idea to determine manifold and hood clearances. The one thing you don't want to do is get it installed, slam the hood, and discover a dent in the hood.
Because our kit is designed...
Because our kit is designed for a 260/289/302/351W, the fuel pressure regulator won't clear a 351C intake manifold. We have a vintage aftermarket intake manifold, which makes things even more involved. Gil has chosen to move our fuel pressure regulator to the return line on the body, which won't be visible.
It's always a good idea to...
It's always a good idea to test fit everything before doing a permanent installation. Powerjection III fits comfortably beneath the factory air cleaner undetected and without interfering with the hood or intake manifold.
Spacer thickness depends on...
Spacer thickness depends on your goal and clearance. Thicker spacers offer better low and mid-range torque, not to mention manifold heat isolation. Gil tried a variety of spacer thicknesses to check both clearance and potential power gains.
This is throttled vacuum for...
This is throttled vacuum for vacuum advance, which needs to be connected before throttle body installation because access is nonexistent once installed. The one thing you don't want for your engine's vacuum advance is constant vacuum, which is an easy mistake to make.
Gil has moved the fuel pressure...
Gil has moved the fuel pressure regulator to the return line on the backside of our right-side shock tower and tied it to a steel return line. He hard-lined the return flow to the fuel tank to make it look like a factory installation. All he had to do was create a mirror image of Ford's factory hard-line on the left-hand side.
Gil fabricated a bracket for...
Gil fabricated a bracket for the fuel pressure regulator. Note its hidden location on the back of the right-hand shock tower. Gil used high-pressure fuel injection hose from the throttle body to the regulator, then hard-lined the system from regulator to fuel tank with a factory-like installation.
The Eastwood Company provided...
The Eastwood Company provided us with 3/8-inch tube stock from Classic Tube. Eastwood also set us up with a tube bender, which custom bends tubing without kinking the line. You can also use a large socket for tube bending if done carefully.
A mini tubing cutter works...
A mini tubing cutter works well in tight spots should you find yourself needing to shorten existing tubing.
A tube flaring kit is invaluable...
A tube flaring kit is invaluable when plumbing a classic Mustang. For high-pressure fuel systems, you want a double flare. Where hose meets line, do a bubble, which is the first step in a double flare, without doing the flare.
Gil carefully configures the...
Gil carefully configures the return line bending as he goes. Where things get tight, he opts for two lines to make installation easier. This is the return line just below the regulator. When you hard-line the fuel system, you make things safer. It also looks much better than flexible or braided hose.
Gil has installed the Professional...
Gil has installed the Professional Products' high-pressure fuel filter where the body line and short line meet just behind the torque box. You can completely hard-line this location or, like Gil, use high-pressure hose on both sides.
Powerjection III comes with...
Powerjection III comes with a high-pressure electric fuel pump, which gets its power from a switched source, such as the ignition switch. The kit includes an inline fuse. We also suggest an impact switch, available from your Ford dealer, which disables the fuel pump in the event of a collision. Gil has fabricated this fuel pump bracket, which will locate the pump above the rear axle and tank.
Because our '70 Mach 1 doesn't...
Because our '70 Mach 1 doesn't have a fuel tank drain plug, we're forced to modify the fuel sending unit with a return line. Gil drills the sending unit for a custom-made return line.
This is the way your fuel...
This is the way your fuel sending unit should look with the return line.
Installed in the 22-gallon...
Installed in the 22-gallon California-emissions fuel tank, Gil's sending unit looks like this using high-pressure fuel injection hose both ways.
For safety, Gil hard-lined...
For safety, Gil hard-lined the factory fuel line to the electric pump.
Here's Gil's handy work. The...
Here's Gil's handy work. The body fuel return line mirrors the factory fuel supply line on the left side.
Pressure hose meets throttle...
Pressure hose meets throttle body behind the distributor.
The coolant temperature sender...
The coolant temperature sender normally goes in the intake manifold on 260/289/302/351W engines. However, the 351 Cleveland has a dry intake manifold with the temperature sender located in the front of the block at the timing cover. This particular lead will not reach, hence our heater hose location. And we will be honest with you; this is not the optimum location. The best location is engine block or head water jackets.
Gil has fabricated a fuel...
Gil has fabricated a fuel line manifold for the throttle body, which locates the fuel pressure regulator out of sight. It also wouldn't clear the intake manifold on this 351C.
The O2 sensor port is bored...
The O2 sensor port is bored and sensor installed as shown. No welding is required, although you can have an exhaust shop....
....weld an O2 bung in for...
....weld an O2 bung in for professional results. The right cylinder bank is your best choice.
Professional Products makes...
Professional Products makes it easy to determine what hooks up where. Each wire is marked and color-coded.