Volumetric eff.

[Edward Hernandez R]

"Unless Engine Analyzer is a true airflow solver (with user-defined 
mesh points, etc) and the user enters info like intake runner 
cross-section, inertial supercharge index, etc, it is dealing with 
approximations"

I use a true airflow solver on the job. It's called MANDY, which 
stands for MANifold DYnamics, and is mentioned in papers submitted to 
various engineering societies and journals(most recently in SAE 
automotive Engineering last month).It's proprietary, but very
accurate. Our mesh isn't user-defined, it's automatically generated. 
We do input runner lengths and cross-sectional areas(among other 
things), but there is no 'interial supercharge index', a term we've 
never heard of. If you mean 'inertial charging', true solvers will 
calculate it; it's an output, not an input. In spite of it's accuracy,
 we'll be the first to admit that it's still an approximation.