Have you seen this article? https://www.musclecardiy.com/perfor...tem-math-build-high-performance-engines/
Written by John Baechtel. He talks a little about the different programs available and then explains how to calculate header dimensions using formulas from Jim Mcfarland. Checked dead nuts against one of John Kaase's engine masters entries.


Also some of David Vizards books cover exhaust tuning.

Last edited by GomangoCuda; 09/21/20 04:09 PM.
In theory, there is no difference between theory and practice. In practice, there is.