The formula to calculate the optimal intake length (L) is:
\[ L = \frac{c}{2 \cdot \frac{N}{60}} \cdot \frac{1}{4} \]
Where:
Let's say the speed of sound (\( c \)) is 343 m/s, and the engine RPM (\( N \)) is 3000. Using the formula:
\[ L = \frac{343}{2 \cdot \frac{3000}{60}} \cdot \frac{1}{4} \]
We get:
\[ L = \frac{343}{2 \cdot 50} \cdot \frac{1}{4} \approx 0.86 \text{ meters} \]
So, the optimal intake length (\( L \)) is approximately 0.86 meters.
Intake length is the distance from the intake valve or port of an internal combustion engine to the point where the intake air reaches sonic speed. The length of the intake path affects the engine’s ability to fill the cylinders with air, and thus its performance. By tuning the intake length, one can optimize the engine’s power and efficiency at a specific RPM range.
