it's not a joke (although in hindsight, i can see where the zip tie mount job seems coould make it seem pretty convincing!)
lemme preface by sayiing that i'm not nearly as familiar with turbochargers as some of you clearly seem to be! very cool! this is a learning experience for me anyway. yeah, so, my pops is lending pretty credible leadership with the project. he's a field engineer for garrett and has been working with turbo's his entire adult life, both professional and recreationally. (my pop is a fuckin' genius)
anyway, this is not going to be a "proper" install in the truest technical sense of the word. all technical discussions aside, he's mentioned many of the same issues you brought up concerning boost, lag, flow, etc. however, the objective isn't a genuine, brutally fast racer (although, he's certainly more than capable of most at doing that). it's just gonna be a wickedly kick ass street toy with plenty of looks to match the devistating sound. on a stripped frame, that base 750 engine will be more than strong enough to make up for the lag on the street. so really, you can imagine the freedom all this allows.
like that tank huh? me too! great lines! yeah, bilateral sectioning will bring the proportions up to the size of that larger frame...about 6" back, 3" up, and 3" wide...with deep knee and bar scallops, it should make a pretty wicked fuckin' tank. at least, the one in my head is pretty tight...