PARAMETER RELATIONSHIPS:  FACTS THAT SOME PEOPLE FIND HARD TO BELIEVE

You will find specific mathematical relationships between the engine’s parameters, and specific engine parameters with mathematical relationships to the camshaft.  It is these mathematical relationships that determine the engine's volumetric efficiency capability at a given RPM, or determine the peak HP RPM limit required to acheive a given VE%.  These parameter relationships can then determine the required values for intake valve area, average intake port area, camshaft seat duration and net valve lift for the indicated VE% at the indicated peak HP RPM.


PARAMETER RELATIONSHIPS AND HOW THEY AFFECT RELATED VALUES  

Bore has a squared relationship to Net Valve Lift.  
So, increasing the Bore by 10% will require a 21% increase in the Net Valve Lift

Bore has a squared relationship to Required Intake Valve Area
Increasing the Bore by 10% will require a 21% increase in the Req Intake Valve Area

Stroke has a direct relationship to Required Intake Valve Area
Increasing the Stroke by 10% will require a 10% increase in the Req Intake Valve Area

Stroke has a direct relationship to Net Intake Valve Lift
Increasing the Stroke by 10% will require a 10% increase in the Net Valve Lift

Stroke has a square root relationship to Seat Duration
Increasing the Stroke by 10% will require a 4.88% increase in the Seat Duration

Port Flow CFM has an inverse, square root relationship to Net Valve Lift
Increasing the Port CFM by 10% will allow a 4.88% decrease in the Net Valve Lift

VE% has a direct relationship to Net Intake Valve Lift
So, increasing the VE% by 10% would require a 10% increase in the Net Valve Lift

Mean Port Velocity has an inverse, square root relationship to Seat Duration
Increasing the Mean Port Velocity by 10% will dictate a 4.88% decrease in the Seat Duration

Mean Port Velocity has an inverse, square root relationship to Net Intake Valve Lift
Increasing Mean Port Velocity by 10% will dictate a 4.88% decrease in the Net Intake Valve Lift

Mean Piston Velocity has a square root relationship to Seat Duration
Increasing the Mean Piston Velocity by 10% will dictate a 4.88% increase in the Seat Duration

Mean Piston Velocity has a direct relationship to Net Intake Valve Lift
Increasing Mean Piston Velocity by 10% will dictate a 10% increase in the Net Intake Valve Lift





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