I don't know if this is in the right topic but I have a question, (at the bottom, the length of this OP is so i get the specific and correct answer.) I know that you can supercharge, or turbo charge a bike, but do they make ones that are centrifugal, the ones that kinda look like a turbo anyway?? They're a fantastic way to go with car, using a blow through set up back on to the carby, because they spin so much faster than engine speed and blow compressed air into the original air/fuel mixture. However.... What it is that confuses me, for instance, is that say you put one on a V8, that motor may redline @ 6500 RPM. At that speed, an average cf sc would have it's pully going at 1.5 times that speed, with it's internal gearbox spinning the inside bits at 5/5.5 times that speed. Essentially, the blower is spinning at 48-50,000 RPM, not an issue with the typical ones have a limit of about 65-70,000 RPM. So if you were to attach one of these to a bike motor, you need one thats got a 180 odd thousand RPM redline. Is this the reason turbo-charging is much more common with sports bikes? Or are the centrifugal blowers designed to hit 200k RPM? Thanks.