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If you cannot find an answer to your question, please reach us at info@induction-logic.com
We built this software with the purpose of calculating the cam requirements that will fill and trap the most air in the cylinder for the given components and RPM. MCR has no relationship to, and no affect on cylinder filling. If you want to use 15:1 compression with a mileage cam, you should not be using this software.
Our port velocity values are calculated with the in/h2o created by the piston motion and are not relative to 28" as in other software. These are operating values, which is needed to calculate the correct valve opening values.
You didn't read the user's manual, did you? Always model with the 100% displayed on the quik button. This will calculate the best cam for your entered values and will achieve the best all around performance with the widest operating range. If you want to soften the cam for longevity, the MPV button will decrease the valve lift to it's minimum for that combination and RPM by increasing the mean curtain velocity up to, but not above the mean port velocity (MPV). This will have less Torque and CBHP. If you are willing to give up some torque for a little more CBHP, the 300 button will slow the curtain velocity to 300 fps and increase the valve lift to it's maximum for that combination and RPM. This is also used for specific situations that are explained in the manual.
Your intake valve area is smaller than the CID & RPM requirement, which is acceptable for drag racing...to a point. The required valve lift will increase to compensate and the profile will become to violent. In that case, lower RPM or get a bigger valve. Colors will also change if you have way to big of valve for application. Like putting a pro-stock head on a street engine. If that's the case, don't waste your time. Get the correct head, valve sizes and port flow.
Potential VE% can only begin to be achieved when the piston is moving at a mean velocity well above 4500 FPM. Achieving the heroic theoretical values displayed will require 5500 FPM piston velocity and above.
In 1952, the "Gulp" factor was introduced in an SAE paper. It described choke occurring at .5 to .6 of Mach 1, with .6 Mach being 669.7 fps. Since then, no one has ever proclaimed an exact number, though in recent years many engine and port experts believe the current port designs are reaching up to 760 fps. Most now agree that choke is directly related to the port design. Choke will be at it's highest when the port is straight, short and at a zero angle.
First, we measure Manifold Air Pressure after the intercooler. Unless you're increasing the intercooler efficiency proportionally with the boost, the higher boost creates more inlet charge temperature. The increase in temperature is causing some of the manifold air pressure increase, requiring less CFM.
The CFM demand created by the piston disc area at the crank degree of maximum piston velocity.
Our standard hydraulic profile clearance ramps are .006" +/- .0002". But the user can enter a value as low as .004".
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