Muffler Calculator
Calculate the optimal muffler size and configuration for your vehicle with our comprehensive calculator. Determine exhaust backpressure and performance based on engine specifications and exhaust system parameters.
Step 1: Engine Specifications
Understanding Exhaust Flow
Exhaust systems must handle the volume of gases produced by the engine. Turbocharged and supercharged engines typically require larger diameter exhaust systems due to increased exhaust flow.
Step 2: Exhaust Parameters
About Backpressure
Some backpressure is necessary for proper engine scavenging, but excessive backpressure reduces power. The ideal exhaust system balances flow efficiency with appropriate backpressure for your engine type and application.
Muffler & Exhaust Results
Required Exhaust Flow Capacity
Muffler Type Flow Comparison
| Muffler Type | Flow Factor | Required Flow Rate | Estimated Backpressure |
|---|
Exhaust System Requirements
Exhaust Flow Formula
Flow Rate = (Engine Displacement × RPM × Flow Factor) / 3456
To calculate exhaust flow rate: Multiply engine displacement in cubic inches by RPM and flow factor, then divide by 3456 (conversion factor). This gives the flow rate in cubic feet per minute (CFM).
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