Lol, don't really care. But that's the sound file that was in the board, and the chuff sound matches the smoke fan, so no biggie. Are you suggesting that someone at some point put a different PS2 board in? I'd be surprised, because it all looked tied up nice and beat like the factory does it. Didn't look like a replacement.
In any case, whoever did it did a decent job. And I'm not complaining. I don't want to make anyone jealous, but I got this engine for less than I would spend at Skyline Chili on a 3 way and a couple of Coneys for lunch (not exaggerating). So it can chuff all it cares to chuff as far as I'm concerned!