Nett® Catalytic Converter Sizing Program

Method 3: Estimate Flow Rate from Engine Speed and Displacement

This estimate, based on assumed volumetric efficiency factors, tends to somewhat underestimate gas flow rates from newer engines with sophisticated turbocharging and aftercooling systems.

Engine Aspiration
NaturalTurbochargedT-Aftercooled

Engine Cycle
4-stroke2-stroke2-stroke, ps*

Displacement
litercm3CID

Rated Speed
rpmHz

Exhaust Temperature
°C°F

Exhaust System Configuration
Single tailpipe, 1 catalytic converter per engine
V configuration, 1 converter per bank (2 converters per engine)

Preferred system of units:
Metric
US