Mercedes Mullins
The fuel crossover line is a system designed to equalise fuel pressure between two cylinder heads. It was originally used in trucks that would only pull fuel from one tank, so the fuel would flow from the other tank to keep the tanks equalised.
| Characteristics | Values |
|---|---|
| Purpose | To equalize fuel pressure between two cylinder heads |
| Use | To prevent the last injector in the firing order from starving |
| Compatibility | V8-style fuel rails |
| Compatibility | LS1, LS2, LS3, LS6, L76, L99 applications |
| Compatibility | Nuke Performance LS Fuel Rail (P.N.# 100-07-203) |
| Compatibility | 6.0 Power Stroke engines |
| Design | Braided housing |
| Design | Two 90° 8-AN hose end fittings for attachment |
| Safety | 100% safe for alcoholic fuels such as E-85 |
| Safety | Can withstand high flow, high horse-power demands |
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What You'll Learn
- The fuel crossover line was used in trucks that only pulled fuel from one tank
- Newer trucks pull fuel from both tanks and don't need a crossover line
- The crossover line helps equalise fuel pressure between the two cylinder heads
- The Nuke Performance Chevrolet LS Crossover Fuel Line is designed for V8-style fuel rails
- The Dfuser 1001061 Stainless Braided Fuel Crossover Line Kit is designed for non-regulated fuel pumps
The fuel crossover line was used in trucks that only pulled fuel from one tank
The fuel crossover line is no longer necessary in newer trucks, which pull fuel from both tanks and don't have a crossover line. These systems are called "top draw" and feature a "T" in the middle of the line. They also have a "T" on the return line, which has a tube that goes to the bottom of the tank. This means that if you fill only one tank, the tank with the most back pressure will have the least amount of fuel return to it until the other tank has levelled out.
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Newer trucks pull fuel from both tanks and don't need a crossover line
The fuel crossover line is an older system that was used when trucks would only pull fuel from one tank. In this case, the fuel would flow from the other tank to keep the tanks equalised. However, some newer trucks pull fuel from both tanks and don't need a crossover line. These systems are called top draw, and they draw from both tanks to a 'T' in the middle. They also have a 'T' on the return line. This means that if you fill only one tank, the tank with the most back pressure will have the least amount of fuel return to that tank, until the other tank has levelled out.
Newer trucks that pull fuel from both tanks don't need a crossover line because they have a different system for equalising fuel pressure. This system is designed to balance out the two cylinder heads. The 6.0 Power Stroke engines are designed to fire three cylinders on one side per revolution. This means that the last injector in that firing order could see less fuel pressure and potentially starve. By connecting the two cylinder heads together, the chance of the injectors running low on fuel pressure and/or fuel is reduced.
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The crossover line helps equalise fuel pressure between the two cylinder heads
A fuel crossover line is a system designed to equalise fuel pressure between the two cylinder heads. It was originally created to keep the fuel tanks in trucks equalised, as they would only pull fuel from one tank, so the fuel would flow from the other tank to keep the tanks balanced.
The system is designed for non-regulated fuel pumps, as many aftermarket fuel pumps are regulated. The Stage II kit is not needed for this system.
Some newer trucks pull fuel from both tanks and do not have a crossover line. These systems are called top draw, as they draw from both tanks to a "T" in the middle. They also have a "T" on the return line.
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The Nuke Performance Chevrolet LS Crossover Fuel Line is designed for V8-style fuel rails
A fuel crossover line is a system designed to equalise fuel pressure between the two cylinder heads. Years ago, trucks would only pull fuel from one tank, so the fuel would flow from the other tank to keep the tanks equalised.
The Nuke Performance Chevrolet LS Crossover Fuel Line is a fuel rail crossover line for V8-style fuel rails. It is designed to work with the Nuke Performance LS Fuel Rail (P.N.# 100-07-203). It features a braided housing and two 90° 8-AN hose end fittings for attachment. It is 100% safe for alcoholic fuels such as E-85, and can withstand high flow, high horse-power demands. Nuke Performance offers this as a lightweight, fast to secure, and convenient option when installing a custom or aftermarket fuel system on an LS engine. It is suitable for LS1, LS2, LS3, LS6, L76, and L99 applications.
The Nuke Performance LS High Performance Fuel Rail is sold separately. The Nuke Performance Chevrolet LS Crossover Fuel Line is also available as an optional AN-8 braided fuel hose crossover hose kit, specifically designed for LS engines. It is engineered to pair seamlessly with the Nuke Performance LS fuel rails, part number 120-10-101.
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The Dfuser 1001061 Stainless Braided Fuel Crossover Line Kit is designed for non-regulated fuel pumps
A fuel crossover line is a system that is designed to equalise the fuel pressure between two cylinder heads. It is used to balance the heads, which is necessary because some engines are designed to fire three cylinders on one side per revolution. This means that the last injector in the firing order could see less fuel pressure and potentially starve. By connecting the two cylinder heads together, the chance of the injectors running low on fuel pressure is reduced.
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Frequently asked questions
A fuel crossover line is a system designed to equalise fuel pressure between two cylinder heads.
The purpose of a fuel crossover line is to balance the fuel pressure between the two cylinder heads. This ensures that the injectors do not run low on fuel pressure or fuel.
A fuel crossover line connects the two cylinder heads together. This reduces the chance of the injectors running low on fuel pressure or fuel.
