EFI and Engine Dynamic Notes

I don't know if anyone is interested but here are my PERSONAL NOTES from an online EFI course i'm taking. I emphasize PERSONAL NOTES because they are just that, I typed them and they may have errors. speaking of errors, if anyone could please point them out so i can change them it would be much appreciated.

these will be edited/updated as i progress

NOTES:

Volumetric Efficiency

-Cylinder Volume (CV): 3.14159 x Radius of Bore Squared x Stroke
*Measured in CI

-Engine Volume (EV): CV x # of Cylinders
*Measuerd in CI

-Theoretical Airflow (TAF): (EV x RPM)/1728
*Measuered in CFM

-Volumetric Efficiency (VE): Actual Airflow/Theoretical Airflow
*Measured in %


Standard Conditions

-Standard Atmospheric Pressure: 14.7 PSI or 101.3kpa

-Standard Temperature: 59f or 15c

-Absolute Pressure: Pressure measured against Absolute Vacuum
*Zero = 0 PSI
*Zero = 0 kpa

-Guage Pressure: Pressure measured against atmospheric conditions
*zero = 14.7 PSI
*Zero = 101.3 kpa

-Rankine Temperature Scale (R): Temperature F Measured against Absolute Zero
*Absolute Zero ~ -460f

Air Density

-Air Density (D): (2.7 x Absolute Pressure in PSI)/Temperature on Rankin Scale
*Measuerd in LBs (Pounds)
*Rankine Scale: Temperature Fahrenheit + 460
*Air Density under Standard Conditions:.076LBs

-Theoretical Mass Airflow (TMAF): TAF x D
*Measured in LBs/Min

-Mass Airflow (MAF): Actual Airflow of Engine x D
*Measured in LBs/Min

Air Fuel Ratio

-Air Fuel Ratio (AFR): Mass of Air/Mass of Fuel
*Displayed as a ratio

-Stoichometric AFR (Stoic): The Ratio at which complete burn of fuel is acheived
*Gasoline: 14.7:1
*Diesel: 14.5:1
*Ethanol: 9:1
*E85: 9.8:1
*Methanol: 6.4:1
*Hydrogen: 34.2:1
*Propane: 15.5:1

-Lambda (Goofy ass symbol): AFR/Stoic
*Measured as % usually two decimals
*<1 is Rich
*>1 is Lean

Break Specific Fuel Consumption

Break Specific Fuel Consumption (BSFC): (Fuel Flow in lbs/hr)/Horse Power
*Amount of Fuel (in lbs) needed to make 1 HP for 1 Hour

end

that's all for now