I had similar dumb people in my auto body class back in high school.
I had one guy claim he had a 280zx turbo, little did he know I was in to Z cars. He starts talking about it and pointing at his emblems he obviously got from a junkyard from some random cars..... i ask him to pop the hood and he points at his "turbo." I just sat there and started laughing...... he was pointing at the plastic injector cooling fan. i just told him to stop talking and go sit in the corner.
another time someone brought in a lt1 camaro with a pretty stout set up that he was getting painted. my friend.... im almost ashamed to cal him that..... asks him what all is done to the camaro. The guy that brought in the camaro clearly has everything he is talking about. he starts by saying its a 383 with ported intake, cam, heads, etc., and the car is loud as sin. not to mention he also has a supercharger that he was waiting to plumb that was mounted in the engine bay but not quite hooked up. my friend isnt the brightest crayon in the box and asks the guy "so its stock." he was dead serious and the camaro guy just walked off.
we still give him crap for that one. luckily he has learned a little more about cars since that moment.
Kevin