Dyno Room - ECU Power Flash Tuning & Performance Testing

Discuss UTV dyno testing, diagnostics, and ECU tuning with FastUTV / Corona Motor Worx in Corona, California. Testing should be planned around the actual vehicle, fuel, hardware, and intended use.

Prepare for a Tuning Consultation

• Exact year, make, model, and ECU
• Fuel type and measured ethanol content when relevant
• Engine, intake, exhaust, turbo or supercharger, and fuel-system modifications
• Current calibration, target power, and any drivability concerns

From Our Shop

In a joint June 12, 2026 Instagram post, Corona Motor Worx and FastUTV report a 35 HP gain from E85 tuning on a stock Pro R. The caption does not provide a complete dyno sheet, correction method, or measured ethanol content. Treat this as a shop-reported result for that build, not a guaranteed gain for every vehicle or tuning stage.

See the August 28, 2026 RZR 170 tuning feature, which identifies a vehicle that had already been tuned before arriving at the shop. It is not an untreated-stock baseline.

Compare Results Correctly

Crank horsepower and wheel or hub horsepower are different measurements. Compare runs using the same measurement method and documented fuel, hardware, conditions, and calibration. Ask for the test record that matches your proposed setup.

Browse FastUTV aRacer standalone ECU packages. Dyno time and custom work are included only when the selected listing expressly says so.

Contact FastUTV / Corona Motor Worx to discuss your vehicle and confirm availability before arranging a visit.