Ameer Randolph
Fuel injection can improve the fuel efficiency and performance of older carbureted engines. There are two types of fuel injection: multi-port fuel injection and throttle body injection. Multi-port fuel injection has a single injector for each cylinder and requires the installation of a new intake manifold and fuel rails. Throttle body injection, on the other hand, is easier to install and can be done in less than an afternoon. To put a 350 in a fuel injection car, you can use a fuel injection bolt-on kit or a conversion kit. These kits can improve the performance and throttle response of your car.
| Characteristics | Values |
|---|---|
| Fuel injection type | Throttle body injection, multi-port fuel injection |
| Fuel injector system | Solenoid pack with 8 nozzles |
| Fuel injector kit | MSD Atomic 2900, MSD Atomic 2910, Edelbrock ProFlo4, Holley Sniper |
| Fuel tank | Seafoam or fuel injector cleaner can be added to clean the tank |
| Fuel pump | External fuel pump with a return line |
| Fuel lines | OEM steel fuel lines must not be used |
| Fuel efficiency | Improved with fuel injection |
| Fuel consumption | Improved with Edelbrock ProFlo4 |
| Fuel injector cleaner | Can be used to clean the system |
| Fuel gauge | May need to be changed if incompatible with the fuel injection system |
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What You'll Learn
Fuel injection kits and EFI systems
There are a variety of fuel injection kits available on the market, each with its own unique features and benefits. For example, the Edelbrock ProFlo4 is a popular choice for those seeking true multi-port injection and additional features. While it may be more costly than other options, it offers superior stability, fuel consumption, and ease of adjustment.
Another well-known brand is Holley, which offers a range of EFI systems, including the Terminator X and X Max LS Kits. These kits provide real-time fuel learning, high impedance injector drivers, and integrated sensors. Holley also offers Plug and Play compatibility with its EFI accessories, such as analog gauges, shift lights, and modules.
When choosing a fuel injection kit, it's important to consider the size of your engine. EFI kits are rated by the maximum horsepower they can support, and choosing a kit that is too large for your engine can result in poor performance. Additionally, if you plan on using power adders like nitrous, turbochargers, or superchargers, it's recommended to select a power adder-compatible EFI kit.
Finally, it's worth noting that fuel injection kits require careful installation and wiring to ensure long-term reliability. While they can provide significant performance benefits, proper research and mechanical knowledge are crucial for a successful outcome.
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Fuel injector system components
Fuel injection systems can be divided into low-pressure and high-pressure sides. The low-pressure components include the fuel tank, fuel supply pump, and fuel filter. The fuel tank stores the fuel, which is then drawn into the fuel supply pump. The fuel supply pump delivers the fuel to the high-pressure side of the system.
The high-pressure side components include a high-pressure pump, accumulator, fuel injector, and fuel injector nozzle. The high-pressure pump further increases the pressure of the fuel, which is then sent to the accumulator. The accumulator stores the pressurised fuel and distributes it to the fuel injectors. The fuel injectors are effectively spray nozzles that inject the fuel into the combustion chambers of the engine.
The fuel injector nozzle is an important component of the fuel injection system. It is responsible for spraying the pressurised fuel into the engine. The nozzle is typically located in the combustion chamber, inlet manifold, or throttle body. The injector nozzle can be controlled in various ways, including electronically or with a solenoid-operated needle valve.
Fuel filters are another critical component of fuel injection systems. They help to remove contaminants and fine particles from the fuel before it enters the system. This is important to prevent damage and premature wear to the injectors and other engine components. There are various types of fuel filters available, including single-stage and two-stage filter systems. The specific type of fuel filter used depends on the application and the degree of filtration required.
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Fuel efficiency and performance
One user reported that they gained 2-3 mpg with their Holley Stealth Ram, achieving 20-22 mpg on the highway in their 66 coupe. They also noted that the FAST system would be a good choice for simplicity. Another user reported achieving 26 mpg at 70 mph in a '70 Nova with a 350tpi, 700r4, and 3.42 gears. They attributed the improved fuel efficiency more to the transmission than to the fuel injection.
For fuel mileage, one user recommended a FAST system adapted to a Chevrolet Tuned Port Injection (TPI) system, commonly found on 1985 to 1992 Camaros and Firebirds. They noted that while the conversion may not pay for itself in terms of fuel savings, it can still provide improved gas mileage. Another user agreed that the TPI system could provide a slight increase in mpg, but found the conversion process to be challenging.
It's worth noting that some fuel injection systems are designed to prioritize performance over fuel efficiency. For example, the Edelbrock ProFlo4 system is reported to offer superior stability, fuel consumption, and ease of adjustment, while the Holley and FiTech systems are said to produce more horsepower.
When considering fuel efficiency and performance, it's important to weigh the potential benefits against the costs and complexity of the conversion. Additionally, factors such as the transmission, aerodynamic modifications, and the specific engine setup can also significantly impact fuel efficiency.
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Fuel injection bolt-on kits
For small engines, the Ecotrons EFI kit is designed for engines in the 35cc to 300cc range, including GY6 engines (50cc to 200cc) and 150cc monkey bikes. This kit includes all the necessary parts for conversion, such as the ECU, harness, throttle body assembly, fuel pump assembly, and sensors. While it is designed as a bolt-on kit, some mechanical modifications may be required during installation, and basic tuning may be needed after installation.
For larger 350 engines, such as the Chevy 350, there are a few options available for fuel injection bolt-on kits. The Edelbrock ProFlo4 is a popular choice, offering true multi-port injection and additional features. However, it is more expensive than other options and may have availability issues. The Holley Sniper is another option that is easy to set up, only requiring a few wires and sensors to be connected. It is self-contained and bolts in place of most carbs, making it a convenient choice.
When choosing a fuel injection bolt-on kit, it is important to consider the specific engine and its modifications. While some kits are designed as bolt-on solutions, others may require additional mechanical adjustments or tuning to function properly. It is also worth noting that the reliability of these kits may not match that of a new car, as they lack the extensive R&D and testing of factory systems. However, with careful installation and attention to details, such as wiring, fuel, and the charging system, many potential issues can be avoided.
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Fuel injection conversion kits
There are several options available on the market, and the best choice for your vehicle will depend on your specific needs and preferences. Some popular options include the Holley Sniper, which is easy to install and comes with a display that shows engine performance, and the Edelbrock ProFlo4, which is a true multi-port injection system with advanced features. Another option is the FiTech 600hp system, which includes an external fuel pump and a return line, eliminating the need to drop the fuel tank.
When choosing a fuel injection conversion kit, it's important to consider the compatibility with your vehicle's engine and the features that are important to you. Some kits offer additional benefits, such as improved stability and ease of making on-the-fly adjustments, while others provide transmission control for specific models. It is also important to note that some kits may have issues with availability, so it is worth checking before making a purchase.
Additionally, it is recommended to be diligent with your wiring, fuel, and charging system to ensure the smooth operation of your vehicle and to avoid potential problems. With the right fuel injection conversion kit, you can significantly enhance the performance and reliability of your engine.
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Frequently asked questions
Some fuel injection bolt-on kits for a 350 engine include the Edelbrock ProFlo4, the Holley Sniper, and the FiTech 600hp system.
Fuel injection can help improve the fuel efficiency and performance of older carbureted engines.
To convert from a carburetor to electronic fuel injection, you must first ensure that your exhaust system has no leaks. Then, connect the vacuum lines and install a coolant temperature sensor. Next, mount and wire the control/power module, and finish wiring the TBI unit. Finally, connect the handheld controller and turn the ignition to the "Run" position to perform the initial configuration.
