Remember that this test is just to get you in the rough ball park of tuning the LSN. For the HSN, just make sure you have good smoke at WOT, and the motor runs consistent. If the HSN is too lean, it'll be fast as hell at first, then start to loose power later in the tank, richen it up if this happens. Important thing to remember about tuning the HSN is to not tune it right away, but run it hard for about half a tank, and then start tuning it.