Armilite
Well-Known Member
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:
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... | |||
Use | Imperial | Metric | |
Displacement | inches | or | 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 Type | Normally Aspirated | Turbocharged/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 Type | 4 Stroke | 2 Stroke or Rotary | |
Peak Power Engine Speed | rpm | ||
| |||
Peak Intake Flow Rate | 138 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. |