The DW300 Fuel Pump: Reliable High-Flow Fuel Delivery for Performance Engines
The DW300 fuel pump from DeatschWerks is a high-flow in-tank fuel pump engineered to deliver consistent fuel pressure and volume for engines producing up to 600 horsepower. Designed as a direct replacement for OEM pumps, it provides significant performance gains for turbocharged, supercharged, and high-compression naturally aspirated engines without requiring complex modifications. Unlike many competitors, the DW300 combines drop-in installation compatibility with enhanced durability and whisper-quiet operation, making it the go-to upgrade for daily drivers, track cars, and street-performance builds needing reliable fuel delivery.
What Exactly is the DW300 Fuel Pump?
The DW300 is an in-tank electric fuel pump manufactured by DeatschWerks, a leader in high-performance fuel systems. It replaces stock fuel pumps while significantly increasing flow capacity. Constructed with billet aluminum housing and advanced brushless motor technology, the DW300 maintains stable fuel pressure (typically 43.5 PSI for gasoline applications) while flowing up to 340 liters per hour. This extra flow supports increased horsepower demands and prevents lean conditions during aggressive driving. It fits most vehicles using common pump assemblies like Bosch, Delphi, or Denso designs, ensuring broad compatibility.
Primary Applications and Performance Benefits
This pump targets vehicles requiring fuel flow beyond OEM capabilities. Common scenarios include turbocharger or supercharger installations, engine swaps, nitrous oxide systems, and ethanol flex-fuel conversions. The DW300 prevents fuel starvation at high RPMs, reduces the risk of detonation from lean mixtures, and ensures consistent performance during sustained high-load driving. For forced-induction engines, this is critical to avoid catastrophic engine failure. Real-world testing shows it reliably supports 500-600 HP on gasoline and 400-450 HP on E85 ethanol blends. Its brushless motor also eliminates the electrical arcing and carbon buildup that plague brushed motors, extending service life.
Key Advantages Over Competing Fuel Pumps
Superior flow and durability set the DW300 apart. Many "high-performance" pumps operate noisily, but the DW300 uses precision-balanced components to reduce audible vibration, matching OEM quietness. Its brushless motor design withstands higher temperatures and ethanol corrosion better than competitors like Walbro 255 models. DeatschWerks’ U.S.-based manufacturing ensures strict quality control, with each pump tested before shipping. The DW300 also integrates seamlessly with factory fuel pump controllers and wiring, avoiding voltage drop issues common with universal kits. Users report consistent performance without pressure spikes or "hot start" problems after ignition-off periods.
Proper Installation Guidelines
First, verify compatibility using DeatschWerks’ online application guide. Always disconnect the battery before starting. Installation requires removing the rear seat or trunk access panel to reach the fuel pump assembly. Carefully detach fuel lines and electrical connectors, then unbolt the lock ring securing the pump module. Remove the OEM pump from its basket and replace it with the DW300, ensuring all seals, hangers, and fuel socks transfer correctly. Reassemble the assembly and reinstall it into the tank, tightening the lock ring to factory torque specs. Prime the system by cycling the ignition key 3-5 times before starting. Improper sealing or voltage checks can cause leaks or poor performance.
Troubleshooting Common Issues
If the engine struggles to start post-installation, confirm wiring polarity and full submersion of the pump in fuel. Low-pressure output often stems from pinched O-rings during reassembly. Always replace old seals with the kit’s included Viton variants. Unusual whining noises suggest trapped air; verify tank ventilation and that the pump is fully primed. If pressure drops under load, inspect the fuel filter and electrical connections for corrosion or low voltage. The DW300 requires stable 12-14 volts; weak factory wiring may necessitate a relay upgrade. Consult DeatschWerks’ troubleshooting portal for specific error codes or diagnostics.
Maintenance and Lifespan Expectations
The DW300 delivers a 30-50k mile service life with basic maintenance. Use high-quality fuels and replace fuel filters every 12-15k miles to prevent clogging. Avoid running the tank below ¼ capacity, as low fuel levels cause pump overheating. For E85 users, ensure all fuel system components (lines, injectors) are ethanol-compatible. If performance degrades, conduct a fuel pressure test to identify pressure drops. DeatschWerks offers a limited lifetime warranty for manufacturing defects. Note that warranty voidance occurs if installed without proper supporting modifications or used beyond recommended horsepower limits.
Frequently Asked Questions Answered
Does the DW300 require a tune? Not exclusively. Though pairing it with upgraded injectors or forced induction typically needs tuning, the pump alone maintains stock pressure for plug-and-play functionality.
Is a fuel pressure regulator upgrade needed? Only if modifying pressure settings; the DW300 works with factory regulators.
Can it handle ethanol fuels? Yes, full E85 compatibility is standard due to corrosion-resistant internals.
What causes intermittent pump cycling? Usually a low-voltage issue. Test alternator output and ground connections.
How does it compare to the Walbro 450? The DW300 matches the flow while offering quieter operation and better OEM integration.
The DW300 fuel pump remains a benchmark for balancing reliability, power capacity, and everyday drivability—an essential investment for modified engines demanding uncompromised fuel supply.