SuperFlow® Launches SF-Black Widow EX2: The Ultimate Extreme Performance Engine Dynamometer

The New Benchmark in Extreme Engine Testing: 6,000 HP of Precision Power

SuperFlow, a Power Test®, LLC brand and industry leader in dynamometers, specialized test systems, and data acquisition and control systems, proudly announces the launch of the SF-Black Widow EX2, the highest-capacity engine dynamometer on the market. Designed for unmatched versatility and precision, the Black Widow EX2 sets a new standard for extreme performance testing.

Engineered to handle everything from small-block performance engines to Pro Mod and large tractor engines, the SF-Black Widow EX2 can be configured in dual-absorber or single-absorber setups, delivering both high-speed power capability and low-speed torque capacity. Its special-grade stainless steel absorbers resist cavitation, ensuring exceptional durability and long service life.

The SF-Black Widow EX2 represents the next generation of performance engine testing. With its combination of raw power, precision, and intuitive automated controls, it allows engineers and racers to achieve repeatable, reliable results under the most demanding conditions.

Key Performance Capabilities

• Up to 6,000 hp (4,470 kW) and 5,000 lb-ft (6,780 Nm) of torque
• Absorber speeds to 12,000 RPM
• Special-grade stainless steel absorbers designed to resist cavitation for exceptional durability and long service life
• Integrated starter system, eliminating the need for bell housings or engine-mounted starters
• Precise closed-loop load and speed control through advanced water management
• Optional gearbox configurations for increased torque capacity at lower engine speeds

At the heart of the EX2 is SuperFlow’s exclusive quad water valve strategy, featuring four high-response servo valves, two per absorber, to deliver instant load adjustments. This technology enables the dynamometer to react rapidly to sudden changes such as nitrous oxide activation or sharp volumetric efficiency increases from turbocharged or supercharged engines. Stainless steel inlet and outlet valves powered by high-speed stepper motors ensure unmatched control and responsiveness, even under extreme test conditions.

Ease of Use & Advanced Test Automation

The SF-Black Widow EX2 is equipped with automated test sequences and intuitive step-by-step prompts, simplifying operation and ensuring consistent, repeatable results. Standard pre-scripted tests include:

• Acceleration sweeps
• Step and steady-state tests
• Engine break-in cycles

With up to 500 user-configurable data acquisition channels, teams can tailor the system to meet evolving testing requirements. A modular sensor box with expansion panels allows for easy integration of additional sensors over time.

Ideal Applications

• Professional racing teams seeking high-fidelity tuning for Pro Mod, drag racing, and boosted engines
• Engine builders and performance shops requiring extreme horsepower and torque capability
• Agricultural, industrial, and heavy-equipment manufacturers testing large-displacement and high-torque engines
• R&D and engineering organizations focused on emissions, durability, calibration, and advanced development programs

Backed by SuperFlow’s engineering expertise, the SF-Black Widow EX2 is poised to become the benchmark for extreme engine testing, providing the precision, control, and reliability required for next-level performance development.

For more information, visit our SF-Black Widow EX2 page