What Is the DeatschWerks 9-350 Fuel Pump?

The DeatschWerks 9-350 is a:

• High-flow electric in-tank fuel pump

Engineered for:

• EFI fuel systems
• Ethanol-compatible applications
• Increased horsepower demand
• Modern performance builds

The pump is designed to provide:

• Improved fuel flow
• Stable fuel pressure
• Reliable operation under load
• Better injector support

Especially important once:

• Larger injectors
• Bigger turbos
• More boost
• Flex fuel tuning

…start pushing factory fuel systems beyond their limits.

Which happens surprisingly quickly on modern turbo cars.

Why Upgrade the Fuel Pump?

Factory fuel pumps were engineered around:

• OEM horsepower
• Conservative fuel demand
• Stock airflow levels

Once modifications increase airflow and power, the stock pump can struggle to maintain:

• Proper pressure
• Injector supply
• Safe air/fuel ratios

A high-flow fuel pump helps:

• Prevent lean conditions
• Stabilize fuel delivery
• Support larger injectors
• Improve engine safety

Because lean turbo engines have an incredible ability to destroy expensive parts almost instantly.

Usually while sounding spectacular.

Perfect for Turbo and Supercharged Builds

Forced induction dramatically increases fuel demand.

Whether you’re running:

• Turbochargers
• Centrifugal superchargers
• Roots blowers
• Twin-screw setups

…the engine requires significantly more fuel than stock.

The DeatschWerks 9-350 helps support:

• Higher boost pressure
• Increased injector duty cycle
• Stable fueling under load
• Reliable power delivery

Especially on:

• Street builds
• Roll racing cars
• Drag applications
• Daily-driven performance setups

Because modern boosted cars consume fuel with shocking aggression once boost ramps in.

Fuel pumps aren’t a one-size-fits-all form of product. Proper fuel delivery in your engine involves combining the proper fitment and the proper float. This is the reason the DW fuel pump line is built to cover 7 different dimensional formats Every having different fluid connections, electrical connections, diameters, and lengths.

Why E85 Changes Everything

Modern performance tuning increasingly revolves around E85 because ethanol offers:

• Better knock resistance
• Cooler combustion temperatures
• Increased timing capability
• Higher boost tolerance

But ethanol also requires substantially more fuel volume than gasoline.

That means:

• Fuel pumps work harder
• Fuel systems become critical
• Pressure stability matters more than ever

The DeatschWerks 9-350 is engineered to support:

• Ethanol-compatible fueling
• Modern flex fuel systems
• High-demand EFI applications

Because E85-powered engines absolutely punish weak fuel systems.

In-Tank Fuel Pumps Remain the Best Street Solution

Despite the popularity of external motorsport systems, in-tank pumps still dominate street performance builds because they offer:

• Better drivability
• Quieter operation
• Improved fuel cooling
• Easier packaging
• OEM-style integration

This makes them ideal for:

• High-performance daily drivers
• Street/strip builds
• Turbo street cars
• E85 setups

Cars that still need to survive:

• Traffic
• Heat
• Long drives
• The occasional “Mexico” pull

DW pump formats cover standard fitment in-tank, compact fitment in-tank, specialty fitment in-tank, and 2 different universal in-line pumps. Every pump formats is to be had in as much as 4 different float rates yielding over 20 different format float combinations to be sure to have the proper pump on your build.

Package Dimensions: 6.75 L x 4.25 H x 3.25 W (inches)
Package Weight : 2.8 pounds
Country of Origin : China
Fit type: Universal Fit

Ideal Applications for the 9-350

The DeatschWerks 9-350 is commonly used on:

• Turbo imports
• LS swap builds
• Mustang projects
• Subaru WRX/STI setups
• Mitsubishi Evolution builds
• Honda turbo applications

Especially combinations targeting:

• Moderate-to-high horsepower
• E85 capability
• Larger injector upgrades
• Reliable street performance

Basically:
Any project where “factory fuel system” stopped being enough.

Supporting Mods You Should Pair With It

A high-flow fuel pump works best alongside:

• Larger injectors
• Adjustable fuel pressure regulators
• Flex fuel sensors
• Ethanol-safe fuel lines
• Proper ECU tuning

Because fuel systems function as complete ecosystems.

One weak component eventually limits everything else.

Usually right at peak boost.
Usually while somebody’s filming.

Professional Installation Recommended

Fuel system upgrades should always be installed carefully and professionally.

Especially regarding:

• Electrical wiring
• Fuel pressure verification
• Ethanol compatibility
• Fuel line routing

Improper installation can create:

• Lean conditions
• Fuel pressure instability
• Electrical issues
• Dangerous fuel leaks

And fuel leaks near turbochargers remain one of the automotive hobby’s least recommended experiences.

Why Enthusiasts Trust DeatschWerks

DeatschWerks has become one of the most respected names in aftermarket fueling because they focus heavily on:

• Fuel injector engineering
• High-flow fuel pumps
• Ethanol compatibility
• Motorsport durability

Their products are trusted across:

• Drag racing
• Drift competition
• Street performance
• Roll racing
• Time attack

Reliable fueling remains one of the most important foundations of reliable horsepower.

Not anti-lag flames.
Not giant dyno numbers.
Fuel.

Final Thoughts

The DeatschWerks 9-350 Electric In-Tank Fuel Pump is an excellent upgrade for enthusiasts building reliable modern horsepower on turbocharged, supercharged, or E85-powered platforms.

With:

• High-flow fuel delivery
• Ethanol compatibility
• Stable pressure support
• Proven reliability

…it’s an ideal solution for:

• Turbo street builds
• Flex fuel applications
• High-performance daily drivers
• Modern EFI systems

Because once horsepower goals start climbing, fuel delivery becomes absolutely critical.

And boosted engines have zero patience for weak fuel systems.