hahaha we had the same thing go on our dyno runs we had a hot rod day and were offering $25 dyno pulls. One guy came in with a pro charge 5.0 mustang did 3 runs and came out 200 hp less then what the previous dyno shop quoted him on, needless to say the guy was pissed especially in front of a crowd. We told him if you want those numbers its as easy as a couple clicks on the good old computer and you can get your desired readings.....the point to his story is i don't believe the guy at all...and taking it to his buddies speed shop does not do it justice...
ya know what i can't wait to see is someone posting in the Craigslist thread of "some guys rig" boasting he has a 2.5L cherokee bored to a 3.0 pulling 400hp and 500ft lbs bahah