Free exhaust design tip

[krusher]

Well thanks for running through that james, youhave to admit it not exactly simple is it. For you average guy on the street thats some heavy math.

I could handle that now but I think if you the initial equation needs tweeking to tell people whats units they need to use and how to actually get a pipe size out of it and not a internal area.

I will have a think about it again tonight and see what I come up with in sizes for an engine I am thinking of building.