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Peak Intake Flow Rate/Peak Horsepower Calculator

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Armilite

Well-Known Member
Joined
Sep 5, 2011
Messages
3,738
Location
AMES, IA USA
Here is an interesting Peak Intake Flow Rate/Peak Horsepower Calculator for 2 Strokes, and 4 Strokes.

Peak Intake Flow Rate/Peak Horsepower Calculator


I punched in a Skidoo 670 which I know has been Dynoed making 92hp at 6500rpms. It says for 669cc at 6500rpms:

Please enter the displacement in metric or imperial...
UseImperial Metric
Displacement inchesor cc
(For rotary engines make sure you use the mechanical capacity not the taxed capacity)
Please enter the volumetric efficiency or boost depending on your aspiration type...
Aspiration TypeNormally AspiratedTurbocharged/Supercharged
Volumetric Efficiency %or psi boost
(Unmodified engines are about 90% / engines with modifications are about 95% / seriously modified engines can achive 100% or more)
Engine Type4 Stroke 2 Stroke or Rotary
Peak Power Engine Speed rpm

Peak Intake Flow Rate138 cfm 65 litres/sec
Peak Horsepower
92 crank hp
Please note, the Horsepower figure is a rule of thumb approximation, unlike the Flow Rate figure.
 
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