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How Do I Read My BluePrint Dyno Sheet?

Every dyno-tested BluePrint Engine includes a dyno sheet showing horsepower, torque, engine RPM, and other testing data. Understanding what those numbers mean will help you better understand your engine's performance and setup.

 What Is A Dyno Sheet?

A dyno sheet is a record of your engine's performance during BluePrint's dyno testing process.

The dyno sheet shows:

  • Horsepower
  • Torque
  • Engine RPM
  • Air/Fuel Ratio (when applicable)
  • Test conditions
  • Peak performance values
Horsepower vs Torque

Torque

Torque is the engine's twisting force.

Higher torque generally improves:

  • Acceleration
  • Towing performance
  • Low RPM responsiveness

Torque is measured in:

Foot-Pounds (lb-ft)

Horsepower

Horsepower is a measurement of work being performed over time.

Higher horsepower generally improves:

  • High RPM performance
  • Vehicle speed potential
  • Overall engine output

Horsepower is measured in:

Horsepower (HP)

Why Are Horsepower And Torque Different?

Horsepower and torque are related, but they peak at different engine speeds.

Many engine combinations produce:

  • Peak torque at lower RPM
  • Peak horsepower at higher RPM

This is completely normal.

What Is Peak Horsepower?

Peak horsepower is the highest horsepower number your engine produced during dyno testing.

Example:

540 HP @ 6,200 RPM

This means the engine produced its highest horsepower output at 6,200 RPM.

What Is Peak Torque?

Peak torque is the highest torque number your engine produced during dyno testing.

Example:

535 lb-ft @ 4,800 RPM

This means the engine produced its highest torque output at 4,800 RPM.

Why Doesn't My Vehicle Feel Like The Dyno Sheet?

The dyno sheet reflects engine performance under controlled testing conditions.

Once installed in a vehicle, performance is influenced by:

  • Vehicle weight
  • Transmission type
  • Converter selection
  • Rear gear ratio
  • Exhaust system
  • Air cleaner assembly
  • Fuel quality
  • Altitude
  • Weather conditions

As a result, your vehicle may not perform exactly like the dyno cell environment.

Does The Dyno Sheet Represent Flywheel Horsepower?

Yes.

BluePrint dyno sheets reflect engine output measured directly at the engine.

Vehicle chassis dyno numbers are typically lower because drivetrain losses occur through:

  • Transmission
  • Driveshaft
  • Rear axle
  • Wheels and tires

What Fuel Was Used During Dyno Testing?

Your dyno sheet and engine specifications will identify the fuel requirements for your engine combination.

Always run the minimum recommended octane fuel or higher.

What Timing Was Used During Dyno Testing?

The dyno sheet specifications generally include:

  • Initial timing setting
  • Total timing setting

If timing differs significantly after installation, engine performance may change.

What If I Change Parts After Installation?

Changing major components can affect horsepower and torque.

Examples include:

  • Carburetor
  • Intake manifold
  • Headers
  • Exhaust system
  • Fuel injection system
  • Ignition timing

The dyno sheet reflects the engine as tested by BluePrint.

Frequently Asked Questions

Does every BluePrint engine get dyno tested?

Most complete BluePrint crate engines are dyno tested and include a dyno sheet.

Why is my chassis dyno number lower?

Chassis dynos measure power after drivetrain losses, while BluePrint dyno sheets measure engine output directly.

Can weather affect power?

Yes. Temperature, humidity, altitude, and barometric pressure can all affect engine performance.

Can I make more horsepower than the dyno sheet?

Possibly. Component changes, tuning adjustments, and vehicle combination changes can affect power output.