5.9L Magnum questions

Wouldn't say the test worthless, could be better, 380hp crate is a little excessive not many gonna run manifolds on one and from the sounds of it the dude is building a fairly mild 5.9l maybe 50 hp higher than this engine so about 17% more airflow. The overall numbers of gain and losses probably go up slightly maybe around 17%.

Some info is better than no info, you generally can extrapolate, engine performance is somewhat predictable.