Racing Downloads and Software

Header ProgramHeader Sizing Calculator

(1) Program (.exe)
Calculates a good starting point for the proper header for your combination. Even better, by playing with the numbers you'll get a great education on how changes in the engine affect the required header dimensions.
  • Input: Bore Size
  • Input: Stoke Length
  • Input: Exhaust Valve Opening Point (BTDC)
  • Input: Peak RPM
  • Output: Primary Tube Diameter
  • Output: Primary Tube Length
  • Output: Collector Diameter
  • Output: Collector Length

Runs on all versions of Microsoft Windows

Part of the "Engine Pack" collection of programs.