Enter the peak torque RPM into the Intake Runner Length Calculator. The calculator will evaluate the Intake Runner Length.

## Intake Runner Length Formula

The following two example problems outline the steps and information needed to calculate the Intake Runner Length.

IRL = 17.8 + ((10-PT/1000)*4.3)
• Where IRL is the Intake Runner Length (cm)
• PT is the peak torque RPM

## How to Calculate Intake Runner Length?

The following example problems outline how to calculate Intake Runner Length.

Example Problem #1:

1. First, determine the peak torque RPM.
• The peak torque RPM is given as: 4000.
2. Finally, calculate the Intake Runner Length using the equation above:

IRL = 17.8 + ((10-PT/1000)*4.3)

The values provided above are inserted into the equation below and computed.

IRL = 17.8 + ((10-4000/1000)*4.3) = 43.6 (cm)

Example Problem #2:

For this problem, the variables required are provided below:

peak torque RPM = 5000

Test your knowledge using the equation and check your answer with the calculator..

IRL = 17.8 + ((10-PT/1000)*4.3) = ?