Waht does your buddy do that he wanted an engine Dyno? They are superior because there are fewer variables to influence relationships, but it comes at the cost of inconvenience. Most people prefer either to be able to hook the wheels in and run it for ease of use, and the only times I've ever seen anyone use engine dyno was for a spec engine and configuring and testing it for racing applications(because its so much work to tear your engine out just to dyno it).
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