How come horsepower tv gained a very small amount of hp off a 70mm TB on a 97 stang?

[GodStang]

one thing you have to think about on the shows. It is not live. They get to show you what ever clip they want to. I had my car dynoed today. on the first run I dynoed bone stock 271.8 HP and then with my second run with no mods I put down 277.6 HP. That is a gain of 5.8 HP with ABSOLUTLY nothing done. So say they run it three times before mod and take the lowest and then take it three times after the mod. Take the lowest from the first and highest from the second set and send it to the editing room and bam you have a big gain due to what ever. I mean if after the first run I brushed off my tires and then did the run again I could of said that I gained 5.8HP from cleaning my tires. All I am saying is becareful of TV and Magizines, the products that they are deminstrating are the ones sponcering them.