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[TwinTurbo]

Originally Posted by rammertide07

So guess thats why the duramax had the supercharger feeding the turbos. Instant pressure on the "exhaust side" of the turbo to spin them up faster and the turbos are capable of producing more boost...and the supercharger can keep them spun up even after engine rpms drop. Except I dont think boat engine rpms drop. I would see it as a benneficial set-up in something with a transmission though.

Just want to clear up this statement a bit - first I'm not sure what setup you were looking at but I don't think you could set them up this way, the setups I've seen the turbos feed the supercharger - so at low boost from the turbos the supercharger is creating a vacuum on the compressor wheels and basically making them freewheel. As heat and RPM build the exhaust begins to spin the freewheeling turbos faster and provide more air than the supercharger requires so there is pressure now between the turbos and the supercharger which enables the supercharger to compress it even further than just by itself - very similar to a compound turbo effect at peak power. Hope that makes sense - feel free to correct if I'm wrong.