ML Silencer Pro — Engineering V2

Engineering review build. Bev’s ML empirical pressure-drop method is used for estimates. CFD and acoustic performance are not guaranteed; confirm engine limits and actual silencer construction.

1. Engine Exhaust Data

Exhaust Flow Flow Units Reference Gas Density (kg/m³, for mass flow) Flow Basis Reference Temperature (°C) Exhaust Temperature (°C) Gas Absolute Pressure (kPa) Target Maximum Velocity (m/s) Engine Maximum Back Pressure (mbar)

2. Acoustic Requirements

Unsilenced Noise (dBA) Required Noise (dBA)

3. Exhaust System

Pipe Internal Diameter (mm) Straight Pipe Length (m) 90° Long-Radius Elbows (quantity) 90° Short-Radius Elbows (quantity) 45° Elbows (quantity) Branch Tees (quantity) Straight-Through Tees (quantity) Rain Cowls (quantity) ML Silencer Family Silencer Connection / Flow Bore (mm) Additional ML Configuration Constant Use +0.05 or +0.50 only where Bev’s documented construction rules apply. For special CFD configurations use model-specific review, not automatic correction. SCR / DPF / Catalyst Pressure Loss (mbar) Other Independently Known System Losses (mbar)

4. Bore Size Calculator

5. Preliminary Silencer Selection

6. Back Pressure Calculator

7. Engineering Checks

Pressure loss uses Bev’s historical ML empirical coefficients (2024 edition), not conventional dimensionless K factors. Pipework coefficients apply at the selected pipe bore; silencer coefficient applies at its own bore. Verify real internal diameters, gas properties, CFD applicability, pressure boundary conditions, engine limits and acoustic insertion loss before final design.