? flow = HP
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From Superflow:
2.0 Air Flow Through Engines
The power of an engine is directly proportional to the amount of air drawn into the cylinder and retained until ignition occurs. By reducing the air flow resistance of the intake and exhaust tract, cylinder filling is improved and engine power is increased directly.
The average air flow through each engine cylinder can be estimated as follows:
(1) Average air flow (cfm) = 1.67 x HP per cylinder
(2) Average air flow (l/s) = 1.06 x kW per cylinder
The maximum intake air flow rate for a single cylinder will be about 2.5 times the average airflow for the cylinder because the intake occurs during only 40% of the total cycle.
For example, if a Chevrolet V-8 engine produces 440 HP, the power per cylinder is 55 HP.
Average Air Flow = 1.67 x HP = 92 CFM (43.4 l/s)
Avg. Intake Rate = 2.5 x 92 CFM = 230 CFM (108 l/s)
Peak Intake Rate = 2.5 x 230 CFM = 575 CFM (271 l/s)
2.0 Air Flow Through Engines
The power of an engine is directly proportional to the amount of air drawn into the cylinder and retained until ignition occurs. By reducing the air flow resistance of the intake and exhaust tract, cylinder filling is improved and engine power is increased directly.
The average air flow through each engine cylinder can be estimated as follows:
(1) Average air flow (cfm) = 1.67 x HP per cylinder
(2) Average air flow (l/s) = 1.06 x kW per cylinder
The maximum intake air flow rate for a single cylinder will be about 2.5 times the average airflow for the cylinder because the intake occurs during only 40% of the total cycle.
For example, if a Chevrolet V-8 engine produces 440 HP, the power per cylinder is 55 HP.
Average Air Flow = 1.67 x HP = 92 CFM (43.4 l/s)
Avg. Intake Rate = 2.5 x 92 CFM = 230 CFM (108 l/s)
Peak Intake Rate = 2.5 x 230 CFM = 575 CFM (271 l/s)
