Adapted by from data in the nomogram in “SELECTING A MECHANICAL SECONDARY CARBURETOR“ in the file “Selecting A Carburetor.pdf” on the Holley.com website: http://holley.com/data/TechService/Technical/Selecting%20A%20Carburetor.pdf
Spreadsheet with curve fit: http://alteredz.com/tools/HolleyMechSecSizing.xls
A spreadsheet that calculates the Mechanical Secondary carb flow needed, depending on the minumum rpm that Wide Open Throttle (WOT) will be applied, and the engine displacement (in cubic inches). This tool replicates the data in the nomogram to within +/- 6 cfm. Be aware that the advertised "size" of some carburetors are much lower than the actual flow that they are capable of producing at the standard 1.5 inHg. For instance, the Barry Grant Mighty Demon 650 mechanical secondary carb flows approximately 830 cfm.
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Cam Timing vs. Compression Analysis
From the equations presented on: http://victorylibrary.com/mopar/cam-tech-c.htm
A spreadsheet that calculates the cranking pressure (dynamic compression) and a "Volume Pressure Index" of an engine based on it's static compression ratio and camshaft seat timing specs.
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Valve Spring Calculations
A spreadsheet that calculates different valve spring loads at various installed heights.
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Tire and Engine RPM as a function of transmission, gearing and tire size
