that is not true.
the pc is 2 dimensional and the sert is three dimensional.
the sert lets you dyno the bike under different loads.
the ecm recognizes these loads and adjust the bike accordingly.
most tuners dyno the bike with the pc under no load.
that produces high dyno numbers. unfortunately riding on the street is totally different. especially with a windshield and some luggage.
i can't really explain it.
the name of the shop is Jim moroneys cycle. call and ask for dyno George he can explain it better. 845-564-5400
It sounds to me like someone wanted to sell you a SERT, and started making some pretty wild claims, most of which are total nonsense.
When tuning a SERT or PC, proper tuning requires running the bike at different loads. This is why Dynojet, the maker of Power Commander, makes the DJ-250 load cell dynamometer. This dyno allow an operator to set a steady speed, regardless of throttle posistion, allowing the tuner to tune at any load he chooses.
Like I said, someone is feeding you some bull with statements like
most tuners dyno the bike with the pc under no load.
I'm not jumping on you, but it is amazing how much dis-information is spewed about in order to sell one product over another.