Vance, while it true turbos are a natural for aircraft, I think that many people want to use a supercharger because it is much easier for non-professionals to plumb. There is the drive belt of course, but the bearings are usually grease lubed and there is no oil froth and return to sump to deal with. The other plus is there is no need for high temp manifolds or mounts. All that said turbos are one of the few add on devices that can actually improve efficiency and are still my favorite. Bill Jepson
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