Sylvie Willis
The power that a 6 AN fuel line can support depends on several factors, including the type of pump, pressure, length of the line, and the number of fittings. Some sources suggest that a 6 AN fuel line can support up to 800 HP, while others claim it can handle up to 1200 HP with sufficient PSI. It's important to note that increasing the line size may not always be necessary, as it depends on the specific requirements of the engine and fuel system.
How much power can 6 AN fuel line support?
| Characteristics | Values |
|---|---|
| Max HP | 650-870 |
| PSI | 30-60 |
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What You'll Learn
A -6an feed line can support 650 hp with sufficient psi
A -6AN feed line can support 650 horsepower with sufficient psi. This is because the required fuel rail pressure of 70 psig can deliver enough fuel to support 720 HP. The pressure drop through a 3/8" id line at 60 GPH is less than 1 psig, which is still enough to support 650 HP.
The key to a sufficient fuel supply is pumping power. A 3/8" id fuel line can easily support 600 HP given sufficient "pump head". Given a big enough pump, a 3/8" steel line could support 1000 HP. This is because gasoline has lower viscosity and much lower surface tension than water, which is why it flows more easily through a pipe.
However, it is important to note that a single -6AN feed line may not be safe or sufficient for a genuine 1000+ HP engine. This is because the Walbro pumps cannot push a lot of pressure. Therefore, it is recommended to run 2 x -6 lines from the pumps to the rails and a single -6 return. This will ensure that there is no lack of fuel flow ability.
Additionally, it is worth considering that a larger line is not a reserve for EFI. Instead, the large ID needs to be kept full and pressurized, and the fuel pressure cannot drop during a pass. If the pump cannot keep the line full and at pressure, it will not work correctly.
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A 3/8 fuel line can support 2200 hp
However, it is important to note that some users have reported having trouble with a 3/8" line at just over 500 hp. This is not due to the line size itself but because of the fittings and bends, which can create issues with flow. For example, the top of the factory sending unit has a tight bend that can cause problems.
The type of pump being used also plays a role. A big mechanical pump will not work well with a small line, while an electric pump that pushes the fuel might handle it better.
Additionally, the fuel being used should be considered. For example, E85 requires a 30% increase in flow compared to gasoline.
Overall, while a 3/8 fuel line can theoretically support 2200 hp, there are many factors that can affect its performance in practice.
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A 3/8 fuel line can support 600 hp with sufficient pump head
When it comes to fuel lines, it's important to ensure you have the right size to support your engine's power output. A common question is whether a 3/8" fuel line can support 600 hp. The answer is yes, a 3/8" fuel line can indeed support 600 hp, but it depends on having sufficient "pump head" or pumping power.
The "pump head" refers to the amount of pressure the pump can generate, and it is crucial in ensuring the fuel line can deliver the required fuel flow rate to the engine. A larger diameter fuel line will generally support higher horsepower, as it can accommodate a greater volume of fuel at a given pressure. However, simply increasing the line size may not always be the best solution, as it can also lead to higher pressure drops and reduced flow rates if the pumping power is insufficient.
In the case of a 3/8" fuel line, it is capable of supporting 600 hp, but it is important to ensure that the pump can generate enough pressure to overcome any flow friction and deliver the necessary fuel flow rate. This can be achieved through a combination of a bigger pump, higher pump voltage, and/or increasing the line size. Additionally, the type of pump and the fittings and bends in the fuel line can also impact its performance. For example, a big mechanical pump may not work well with a small line, while an electric pump that pushes the fuel may handle it better.
It's worth noting that some sources suggest that a 3/8" fuel line can support even higher horsepower. For instance, Chevy engineers claim that a 3/8" fuel line can feed enough gasoline to support 2200 horsepower. Additionally, with a big enough pump, a 3/8" steel line could potentially support up to 1000 hp. However, it's important to consider the specific requirements of your engine and fuel system when making these assessments.
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A 3/8 id fuel line can support 1000 hp with a big enough pump
A 3/8" internal diameter (ID) fuel line can support 1000 horsepower (hp) with a big enough pump. This is because the key to sufficient fuel supply is pumping power.
While a 3/8" ID fuel line can support 1000 hp, it is important to note that this assumes a straight fuel line. Bends and fittings in the fuel line can cause issues and reduce flow. Additionally, the type of pump being used is also a factor, as a big mechanical pump may not work well with a small line, while an electric pump that pushes the fuel may handle it better.
Chevy engineers have stated that a 3/8" fuel line will feed enough gasoline to support 2200 hp. However, this may not be sufficient for drag racing with a quick car, as a long fuel column will need a boost. In these cases, electric pumps are often employed, and they need to be at the rear of the vehicle.
It is also worth noting that the fuel type can impact the required flow rate. For example, when using alcohol, the flow rate needs to be doubled compared to gasoline, while with E85, the flow rate needs to be increased by around 30%.
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A -6an feed line can support 870 hp with a high-pressure electric fuel pump
A -6AN feed line is a type of fuel feed line that connects to a fuel filter. When combined with a high-pressure electric fuel pump, it can support 870 hp.
The accel DFI high-pressure electric fuel pump, for example, can flow 435 lbs/hr at 45 psi for engines producing up to 870 hp naturally aspirated or 725 hp with forced induction. The pump is rated at 70 gph free flow and a maximum psi of 65 psi.
The ability of a fuel line to support a certain horsepower depends on the pump. A higher-flowing pump at lower psi with a larger line can result in a higher HP rating. For instance, a -6AN feed line with a pump that can deliver 70 gph free flow or 435 lbs/hr at 45 psi can support 870 hp.
It is important to note that the rule of thumb for carburetors is that a -6AN feed line can support up to 500 hp, a -8 feed line can support up to 800 hp, and then 10 and 12 feed lines for higher horsepower applications.
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