I've quickly found in the turbocharging world there are experts, assholes, and nobodies. Assholes can know their shit, or just be belligerent. Arguing with one on the subject of turbocharging is not a good idea. I was told by a friend that I couldn't "comprehend" how a blow through turbo system works.
A week later, we had another conversation and he couldn't believe how incredibly simple it was, the math involved to figure pitot tube size is idiotic simple and takes some trial and error if you don't have a knowledgeable source. Where is it placed in the intake charge pipe? Well, it's defeated some of the greatest minds I have known in the forced induction world locally, but once again, if you experiment and talk to someone that is well versed in such things, the nickle and dime shit is all you worry about.
Connections make a 100% difference in turbo costs. I may talk a pretty big game about knowing my way around a compressor, but it's the priceless connections I've made and maintained through my years as a motorcycle rider/builder that allows me to go pick through parts bins, talk shop with some of the more gifted minds in the industry, and allows me the freedom to create whatever my budget can handle, all because, all I gotta do is ask.
Local turbo guru #1, Bill Whisenant of Motorcycle Performance, turbo bike builder extraordinaire.
Gotta have some thick skin to talk turbo's with Bill, but he is a great guy. Built alot of forced bikes and alot of race bikes, specializes in Ducati's. Was working on a supercharged Hyosung GT250R a few years ago, and I quote, "It was giant waste of time once it blew up the 3rd time on the dyno!!".
Local turbo nuts #2 is retired drag bike builder Arnie Heller. He still has enough years left in him to talk some shop and still has some go-fast bits he would let go for the right price, including an old Mr. Turbo system for a air/oil Suzuki, amongst many, many other cool parts related to boosted bikes. Been itching to go chat with him at the end of the month, see what kinda deal I can strike for a few scavenge pumps.
^^ Back in the 80's the local motorcycle scrap yard owner did this with the help of gasoline engine turbo guru Arnie "King Pin" Heller to reach 9 world records their rookie year in funnybike.
Mr. Heller has this sitting amongst his toybox he calls a shop:
Over 30psi, nitrous injected, tons of billet bits, top secret pistons and cam setup, it really isn't a KZ900 engine anymore.
Unless your well connected, don't expect things to come easy, or cheap. Even then, you still have to pay your dues where it counts, know the right people, and be financially well off enough to "pay to play".
The turbo world is ugly, unforgiving, and expensive. I want more turbo bikes on the road as much as the next guy, but look at ME, I am better connected than 90% of the people I know, I afford rent, a car, a few motorcycles, and beer every friday, but I still can't afford to spend the nickle and dime of a turbo bike just yet. Hell, I've got a few thousand budgeted and can't pull off all the basic parts needed to just get rolling on plumbing everything together for the eventuality of boost.
If you want to get into turbocharging, start with EFI cars. Much more forgiving.