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The Delphi GM 50lb/hr LS Truck Flex Fuel Injector is a popular choice for those with LS Truck Engines from 1999-2020. This injector is sold individually and is compatible with flex fuel engines, as long as the injector height is the same and a USCAR type connector is used. GM has been manufacturing fuel injectors since at least 1985, and their products have evolved over time to meet the demands of more powerful engines. The company offers a range of injector styles, including the Gen IV LS3 style, which is the shortest injector available but still delivers impressive flow potential.
| Characteristics | Values |
|---|---|
| Injector Family | Bosch Jetronic EV1, LS1 style, early LS truck injector, late LS3 EV6 style |
| Connector | USCAR/EV6 |
| Fit | Most LS Truck Engines from 1999-2020 |
| Flow Rate | 50lb/hr |
| Part Number | 12613412-8 |
| Manufacturer | Delphi |
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What You'll Learn
Delphi GM 50lb/hr LS Truck Flex Fuel Injectors 12613412-8
The Delphi GM 50lb/hr LS Truck Flex Fuel Injector is a high-performance fuel injector designed for General Motors' LS series of engines. It is an OEM (Original Equipment Manufacturer) part, which means it is the same injector that comes as standard on GM vehicles. This injector is sold individually and will fit most LS truck engines from 1999 to 2020, as long as they use the USCAR/EV6 connector.
The Delphi GM 50lb/hr injector is a popular choice for those looking to upgrade their fuel injection system, as it offers a significant increase in flow rate compared to earlier injectors. The flow rate of a fuel injector refers to the amount of fuel that can pass through it per unit of time, and it is typically measured in pounds per hour (lb/hr) or grams per second (g/s). A higher flow rate means that more fuel can be delivered to the engine, resulting in potential increases in power and performance.
While the Delphi GM 50lb/hr injector does not have its flow rate specified in cc, we can estimate it to be approximately 681 cc/min (cubic centimetres per minute). This estimation is based on the conversion factor that 1 lb/hr is approximately equal to 8.798 cc/min. Therefore, 50 lb/hr x 8.798 cc/min equals approximately 440 cc/min, or 681 cc for 60 seconds (one minute).
It is important to note that the actual flow rate of a fuel injector can vary depending on various factors such as fuel pressure, temperature, and injector health. As such, it is always recommended to consult a professional or a specialist calculator when determining the appropriate injector size and flow rate for your specific engine and performance goals.
Additionally, when upgrading to flex fuel injectors, it is crucial to verify the injector height and ensure it matches your engine's requirements. This injector family includes the Bosch Jetronic EV1, the tall LS1 style, the early LS truck injector, and the late LS3 EV6 style, each with unique dimensions and connector types.
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Injector height and engine compatibility
The early Bosch-style multi-point injectors, which first appeared in GM TPI engines around 1985, are physically the largest and tallest of all the GM injectors. However, due to their inability to deliver the high flow rates demanded by today's more powerful engines, they are becoming less popular. The tall LS1-style injector is slightly shorter than these older Bosch TPI injectors and retains the EV1 electrical connector.
The first-generation LS1 injector, which was used in passenger car LS1 applications, is much slimmer and slightly shorter than the early Bosch injectors. The latest Gen IV style injector, also known as the LS3 style, is the shortest of the GM injectors. It should be noted that its small size does not imply a lack of flow potential, as these injectors can deliver significant fuel volumes.
The early Gen III truck engines, such as the 4.8L, 5.3L, and 6.0L LS engines, featured a much shorter injector body than the LS1 injector. The unique early GM truck version injector is just slightly taller than the later LS3 injector and uses the Mini-Delphi connector. This is the only injector that utilizes this electrical connector.
When it comes to compatibility, it is important to consider the engine's specifications and the injector's dimensions, including overall length and O-ring sizes. Adapters are available to facilitate the installation of late-model injectors in earlier truck engines, addressing the challenges posed by the confusing array of electrical connector names. Additionally, injector height adapters, such as those offered by ICT Billet, enable height adjustments to match the requirements of different engines.
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Injector flow rate
For example, the Delphi GM 50lb/hr LS Truck Flex Fuel Injector is designed to fit most LS Truck Engines from 1999 to 2020 and has a flow rate of 50 lb/hr. Delphi also offers other LS Truck Injectors with varying flow rates, such as the 35lb/hr, 70lb/hr, and 132lb/hr models.
The LSX family of fuel injectors includes several options with different flow rates. For instance, the LS1 injector has a flow rate of 29 lb/hr at 58 psi, while the LS2 injector delivers 34 lb/hr at the same pressure. The LS3 injector is capable of 41 lb/hr, and the LS7 injector provides 42 lb/hr, both at 58 psi. The LS9 injector has a slightly higher flow rate of 48 lb/hr at the same pressure.
It is important to note that the flow rate of a fuel injector can be influenced by factors such as fuel pressure and engine specifications. As a result, injector flow rates may vary even for injectors with the same part number. Additionally, the physical size and design of injectors have changed over time, with newer injectors being generally smaller and capable of delivering higher flow rates to meet the demands of more powerful engines.
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Injector sizing
Firstly, it's important to understand the evolution of GM fuel injectors. The earliest Bosch-style multi-point injectors in GM TPI engines, which appeared around 1985, were physically the largest and tallest. Over time, GM introduced newer versions, such as the tall LS1 style and the Gen IV (short LS3) style, with the latter being the shortest injector. The connector styles have also evolved, with the Bosch Jetronic EV1, Minitimer, and EV1 connectors being used at different stages of development.
When it comes to injector sizing, it's essential to consider the engine's horsepower rating and fuel consumption. Some people tend to go for larger injectors, assuming they will deliver better performance. However, this is not always the case, as bigger injectors might not perform as efficiently on smaller blocks. The horsepower rating of an injector set depends on factors such as Brake Specific Fuel Consumption (BSFC), displacement, and whether forced induction is involved.
To determine the appropriate injector size, it is recommended to use injector calculators provided by injector and fuel pump companies. These calculators take into account various parameters, including engine specifications and desired performance levels. By inputting the relevant data, you can get a more accurate estimate of the required injector size.
Additionally, it's worth noting that injector spacing plays a role in sizing. All cathedral port LS engines use the same injector spacing, allowing for the use of aftermarket fuel rails. However, mixing and matching fuel rails is not recommended due to the risk of high-pressure fuel leaks.
In conclusion, injector sizing for GM LS flex fuel engines involves considering factors such as engine specifications, horsepower rating, fuel consumption, and injector spacing. By using available resources, such as injector calculators, and taking into account the evolution of GM fuel injectors, one can make a more informed decision when choosing the appropriate injector size for their specific application.
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GM fuel injector identification
Identifying GM fuel injectors can be a challenging task due to the wide range of options available and the subtle differences between different models. This guide will help you navigate the process of GM fuel injector identification by providing detailed information on the key aspects to consider.
One of the most important factors in identifying GM fuel injectors is understanding the different types and their unique characteristics. The injector family can be broadly categorized into five popular types:
- Bosch Jetronic EV1: This is the original injector type and is known for its tall and bulky design. It was first introduced around 1985 and is physically the largest and tallest among all GM injectors. However, due to its lower flow rates, it is becoming less popular in modern engines.
- LS1 Style: This injector is slightly shorter than the older Bosch TPI injectors and retains the EV1 electrical connector. It is often recognized for its tall and slim design.
- Early LS Truck Injector: This type of injector is shorter than the LS1 style and is commonly found in truck engines.
- Late LS3 EV6 Style: The LS3 style injector is the latest generation and is the shortest of all GM injectors. It utilizes the EV6 or USCAR connector and delivers impressive flow rates despite its compact size.
- Late Truck Injector: This injector is similar in height to the early LS truck injector but uses the EV6 electrical connector.
When identifying GM fuel injectors, it is crucial to pay attention to specific details such as overall length, O-ring sizes, and electrical connectors. The physical size of the injectors has changed drastically over the years, with the earliest Bosch-style multi-point injectors being the largest and the latest Gen IV (LS3) style injectors being the shortest. The connectors have also evolved, starting with the Bosch Jetronic, then the Minitimer, and finally the EV1.
Additionally, flow rate information is essential for proper identification. While it may not be readily available for all injector types, it plays a crucial role in understanding an injector's performance characteristics. Factors such as displacement and the presence of forced induction influence the flow rate, and online injector calculators can be helpful in determining these values.
To further assist in identification, it is recommended to refer to comprehensive charts and visual aids that provide physical injector dimensions, accompanying images, and part numbers. These resources can simplify the process of differentiating between the various GM fuel injectors and ensure accurate identification.
In conclusion, identifying GM fuel injectors requires a keen eye for detail and a good understanding of the different types, physical characteristics, connectors, and flow rates. By familiarizing yourself with the information provided in this guide, you will be well-equipped to tackle the identification process with confidence and make sense of the diverse range of GM fuel injectors available.
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Frequently asked questions
A GM LS flex fuel injector is a type of fuel injector for GM LS engines that can handle various fuel blends, including gasoline and ethanol.
There are four popular types of GM LS fuel injectors: the original Bosch Jetronic EV1, the tall LS1 style, the early LS truck injector, and the late LS3 EV6 style.
The flow rate of the GM LS flex fuel injector depends on the specific injector. For example, the Delphi GM 50lb/hr LS Truck Flex Fuel Injector has a flow rate of 50lb/hr, while the LSA Fuel Injector PN 12598646 has a flow rate of 52lb./hr at 58psi.
You can buy a GM LS flex fuel injector from various online retailers, such as Hawks Third Generation and LSXceleration.com. You can also find them on forum discussion boards, such as LS1TECH.
