Regan Brown
The R32 GT-R is a high-performance car with a wide and flat fuel tank. This unique design makes it prone to fuel slosh issues, which can lead to engine lean-out and potential damage. To avoid this, it is recommended to keep the fuel tank adequately filled and avoid aggressive driving when fuel levels are low. Running the car with low fuel levels can also cause the pickup of debris from the bottom of the tank and place additional strain on the fuel pump. The R32 GT-R's plastic fuel tank and fuel system design further emphasize the importance of careful fuel management to ensure optimal performance and prevent potential leaks or rust issues associated with the fuel tank and vent lines.
| Characteristics | Values |
|---|---|
| Fuel Tank Capacity | 72 litres (some say up to 80 litres) |
| Fuel Tank Material | Plastic (R32 GT-R), Metal (R32 GTS) |
| Fuel Pump | 190 l/hr or 50 gallons an hour |
| Fuel Slosh Issues | Yes, due to wide and flat shape |
| Fuel Level Gauge Accuracy | May be inaccurate, as some users report discrepancies |
| Ride Height | Very low, impacting handling and causing steep angle of suspension arms |
| Fuel System Upgrades | Frenchy's Performance dual pump setup, Walbro F90000267 pumps, Holley Hydramat |
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What You'll Learn
The R32 GT-R's plastic fuel tank can crack and leak
The R32 GT-R is a high-performance car, but it's important to be aware of some issues with its fuel tank design. Firstly, the R32 GT-R's fuel tank is made of plastic, which can be more susceptible to cracking and leaking compared to metal tanks. While plastic fuel tanks don't fail often, there have been reports of cracked and leaking tanks in the R32 GT-R over the years. The plastic tank can also be more prone to leaks when filling up due to the design of the vent hoses on top.
The wide and flat shape of the fuel tank in the R32 GT-R can lead to fuel slosh issues. This means that fuel can move away from the fuel pickup during hard cornering, acceleration, or when fuel levels are low. Running the engine with insufficient fuel can lean it out and cause severe damage. Therefore, it is recommended to keep the fuel tank above a certain level to avoid this issue and ensure proper lubrication and cooling of the fuel pump.
Some owners have opted to install aftermarket fuel cells or foam in the tank to mitigate fuel slosh, but these solutions may not be perfect and can introduce other challenges. Fuel starvation can still occur, and the foam has a limited lifespan, especially with exposure to ethanol. Additionally, the foam may interfere with the tank level sensor.
Another consideration is the fuel tank capacity of the R32 GT-R, which is typically around 70 to 72 litres. However, some owners have reported fitting up to 80 litres, although this may not be advisable due to potential complications. Keeping the fuel tank adequately filled is crucial for the R32 GT-R's performance and engine health.
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Fuel is needed to cool and lubricate the fuel pump
Driving aggressively with a low fuel tank in an R32 GTR is not advisable. The R32 GTR has a plastic fuel tank, and while they don't fail often, there is a risk of cracking. The R32 GTR fuel tank is also wide and flat, which can cause fuel slosh issues. Running the tank too low can lean out the engine and cause it to blow up.
Fuel is essential for cooling and lubricating the fuel pump, which is a critical component of the vehicle's powertrain. The fuel pump delivers fuel from the tank to the engine, and its proper functioning is crucial for the car's performance.
Fuel acts as a coolant for the fuel pump, preventing overheating and extending the pump's life. When the fuel level is low, the pump can operate at higher temperatures, increasing the likelihood of failure.
Additionally, fuel serves as a lubricant for the fuel pump's internal components. Without proper lubrication, the fuel pump can experience increased wear and tear, leading to decreased performance. Lubrication also protects the fuel pump from corrosion, ensuring smooth operation.
To ensure optimal performance and prolong the life of the fuel pump, it is recommended to maintain adequate fuel levels and consider using fuel additives designed to enhance lubrication, such as Marvel mystery oil.
By following these practices, you can help prevent issues with the fuel pump and maintain the overall performance and health of your R32 GTR.
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Fuel slosh issues can occur due to the wide and flat fuel tank
The R32 GT-R has a plastic fuel tank. While they don't fail often, there have been instances of cracked fuel tanks over the years. The R32 GT-R's fuel tank is wide and flat, which can lead to fuel slosh issues. This occurs when fuel moves away from the fuel pickup, causing the engine to lean out and potentially fail.
Fuel slosh issues can be mitigated by keeping the fuel tank sump or using a larger sump. Additionally, some people have suggested using fuel cell foam in the tank to prevent sloshing, but this can foul the tank level sensor and has a limited lifespan. Another solution is to use a product like Holley's Hydramat, which acts as a reservoir to prevent fuel starvation during hard cornering, acceleration, and other high-performance driving conditions.
Some R32 owners have opted for a dual-pump fuel system, which includes a baffle inside the tank to prevent fuel surge. This system can support up to 1000hp with twin pumps. However, some have found that even with a powerful electric fuel pump, it may not be enough to supply sufficient fuel. In these cases, a mechanically driven fuel pump system may be required.
It is worth noting that the fuel pump in the R32 GT-R is rated at 190 litres per hour, but fuel flow decreases with pressure. This can be a concern during high-performance driving, especially when combined with fuel slosh issues. Therefore, it is recommended to keep the fuel tank above a certain level to avoid any potential issues.
In summary, fuel slosh issues in the R32 GT-R can occur due to the wide and flat fuel tank design. This can lead to fuel moving away from the fuel pickup, causing engine lean-out and potential failure. To mitigate these issues, it is recommended to use a larger fuel tank sump, a product like Holley's Hydramat, or a dual-pump fuel system with a baffle. Keeping the fuel tank above a certain level can also help avoid slosh issues and ensure adequate fuel flow during high-performance driving.
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The stock fuel pump may not be powerful enough
The R32 GT-R has a plastic fuel tank with a capacity of 70-72 litres. While these tanks don't fail often, they can crack and leak, especially when filled to the top. The R32 GT-R's fuel tank is also wide and flat, which can lead to fuel slosh issues. This means that fuel can move away from the fuel pickup, causing the engine to lean out and potentially fail.
To address this issue, some people recommend using fuel cell foam in the tank to prevent sloshing. However, this can foul the tank level sensor and has a limited lifespan. Another option is to use a product like Holley's Hydramat, which acts as a reservoir to prevent fuel starvation during hard cornering, acceleration, and low fuel conditions.
Additionally, it is important to keep the fuel sump full or use a larger sump to ensure proper fuel pickup. Running the car too low on fuel can cause issues with the fuel pump, as the fuel is also used to cool and lubricate it.
The stock fuel pump on the R32 GT-R has a flow rate of 190 litres per hour or 50 gallons per hour. However, fuel flow decreases with pressure, and older return-type fuel systems typically have higher fuel pressure than the R32 GT-R's fuel pump can handle. As a result, the stock fuel pump may not be powerful enough to maintain adequate fuel flow at higher pressures, especially when combined with the fuel slosh issues of the wide and flat fuel tank.
Upgrading to an aftermarket fuel pump setup, such as the Frenchy's Performance dual pump system, can provide increased fuel flow and support higher horsepower levels. These aftermarket systems often include features like a baffle inside the tank to prevent fuel surge and ensure reliable fuel delivery, even during aggressive driving.
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Rusting can occur in the fuel tank
The R32 GT-R is a legendary car, but even legends have their flaws. One issue with the R32 GT-R is its wide and flat fuel tank, which can cause fuel slosh issues. This means that fuel can move away from the fuel pickup, starving the engine of fuel and causing it to run lean and potentially damaging it.
To prevent this, it is recommended to keep the fuel tank as full as possible, especially when driving aggressively. Running the car too low on fuel also increases the risk of sucking up any debris or trash from the bottom of the tank, which can clog the fuel filter and damage the fuel pump.
Now, rusting can occur in the fuel tank, especially in older vehicles or those with metal fuel tanks. The R32 GTS variant, for example, had a metal tank that was more prone to rusting. Moisture in the fuel tank is the main culprit, as water settling at the bottom can accelerate the oxidation process, leading to rust. This moisture can enter the tank through contaminated gas or a loose fuel filler cap.
Rust flakes can clog the fuel filter and damage fuel injectors, resulting in a lean running condition. Therefore, it is essential to regularly inspect your fuel tank for rust, especially if you drive an older vehicle. Proper cleaning of the tank may be sufficient for minor rust cases, but more severe cases may require welding or even fuel tank replacement.
Additionally, some R32 GT-R owners have reported issues with the vent lines on the tank leaking, which can cause fuel leaks. To prevent this, it is recommended to keep the fuel tank full and maintain the vehicle properly.
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Frequently asked questions
The R32 GTR has a plastic fuel tank, which can crack and leak. Running the car with a low fuel tank can cause the engine to suck up trash from the bottom of the tank, which can damage the fuel pump.
Driving aggressively with a low fuel tank can cause fuel starvation, as the wide and flat shape of the tank means fuel can slosh away from the fuel pickup. This can cause the engine to lean out and potentially fail.
You can install fuel cell foam in the tank, which helps to prevent slosh. However, this can foul the tank level sensor and has a finite life. Another option is to use a product like Holley's Hydramat, which acts as a reservoir to prevent fuel starvation.
If your R32 GTR's fuel tank is leaking, you may notice fuel leaking when filling up the tank. You may also notice a strong fuel smell or see fuel stains on the ground underneath the car.
