References for 2-stroke exhaust length tuning

[browney]

Hi,
I was wondering if anyone had any good references for 2-stroke exhaust tuning?
I remember using "Scientific Design of Exhaust & Intake System" but that book is now quite old.

Thanks!

[AngusF1]

Design and Simulation of Two-Stroke Engines - Gordon P. Blair.

[coaster]

There used to be a free software called cone calculator, its for building pipes from flat sheet.
I think your looking for a dyno software, free.
Engine analyzer pro simulates exhaust expansion for 4 stroke, but you need a 2 stroke dyno software, google shall be your genie.