Calculation Of Intake Runner Length

Description : This is a tool made in Java Script to calculate the optimum
length of the intake runners, measured from the valve seat to funnel.
This is merely a translation of the original script made by Williams which
can be found here.

Note! Decimal numbers are entered using dot (.) i.e. 95.6 for example.



Calculation of cylinder volume
Cylinder bore (mm)
Cylinder stroke (mm)
Number of cylinders
Cubic capacity (cm3)

Calculation of ideal runner diameter
Use values from previous calculation
Cubic capacity (cm3)
Number of cylinders
Target RPM
Runner diameter (cm)

Calculation of runner length
Use values from previous calculation
Target RPM
Runner diameter (cm)
Duration intake valve (degrees)
Runner length (cm) or

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