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1 peak or 1 average hp difference? I can see a cleaner tune rolling the drum quicker and being a faster truck on the road with the same(within 1 hp) peak power.just a thought.

maybe there is something that just isnt right with that truck?

so the "other" trucks were run at both dynos before and after the mods?
i can think of quite a few times we tried things on bikes that "had to" be an improvement over what was previously done and...

to me it sounds as though some of the "other" dyno shops are doing tricks to make it appear as though they are making more power than they really put down in the real world.