Planning to take the 355 and the 550 pre/post Tubi for a dyno run. Seeking advice on selection criteria i.e. how to have reasonable confidence that what I'll get back with will make any quantitative sense ? If anyone could give me a checklist of items to look for, that would be most appreciated. I've read with interest the thread on the 360CS run: - coast down run to evaluate driveline loss: is this more accurate than a budgetary estimate like Mitch Alsup did ? - Air/fuel ratio, is it worth measuring and how ? - other gotchas ? Tks.