The Rajay setup I've got for my CB750 is a drawthrough setup. This was done primarily because of the technology of the time, but also because of the limited space (the Rajay setup fits a stock frame). The major downsides to draw-through are reduced efficiency and more frequent turbo rebuilds. The fuel droplets eat away at the compressor vanes. No one can give me a straight answer on how many street-miles I could see from a draw-through setup between turbo rebuilds. The racers used to rebuild them fairly often, so I don't know. That's a problem 'cause Rajay is out of business and no one is making the rebuild parts at the moment. Mr Turbo is trying to outsource some of them, but no luck right now.
Here's my plan. I've traded for another single-inlet turbo intake from an HC board member. I'm thinking about taking a sportster CV carb and attaching it directly to the manifold, and running it in blow-through (blow-through single carb setup). Blow-through affords me more control via a wastegate, and also is more efficient. I think it would be a really interesting system to run a single blow-through carb. I can run a modern, smaller, cheaper turbo that still has rebuild parts available. Who's got turbo experience and would like to weigh in on this system?
