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Calculate Optimum Intake Runner Length

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Speed of Sound : ft/sec
Average area of Runner : in^2
Cylinder Volume : CI / cyl
Static Compression Ratio : :1
Desired RPM : rpm
The recommended length is : inches


note 1: Speed of Sound at 60° Farenheit with carb, throttle body = 1209, with mulitport FI = 1114 fps
this number will decrease as temperature decreases
for each degree increase add 2 ft/sec to the speed of sound

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