ALS is already possible using Speeduino; but some understanding of the functions is required. If you look at the features you'll see how it's rather simple to do for someone familiar with ALS, who would also know how easy it is to damage the engine and the turbo. We (I) do not advertise the methods for this reason. If you know what you're doing, review Speeduino Accessory features, and you'll quickly see how to do it. If you already have the hardware necessary for ALS — go have some fun!
PS: Do a search for posts and threads, and there's at least one video of a Speeduino user on the track with ALS active from a couple years ago.