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<x-charset iso-8859-1>Hello- > Very interesting thread about modern A/C equipment. > Does anybody know in which rpm ranges those Sanden compressors are designed > to work? Well, to overanalyze the problem, look at www.sanden.com and stare at the jillion charts they have. The simple answer, though, is "regular rev ranges," i.e. semi-normalish setups work fine. > Wouldn't it be possible to attach the compressor directly to the crankshaft > pulley with some kind of flexplate or any other flexible coupling? Will the > rpm be sufficient for "enough pumping"? The rpm is sufficient, but the fabrication, installation, and maintenance (you have to charge the thing and add oil) would be a PAIN and a half!!! > I imagine the compressor mounted on some rigid support INSIDE the air duct > opening, before where the air bellow is mounted, and connected to the crank > with some kind of flexible joint, so that the air flow isn't much restricted > and the balance of the crank isn't affected. > Then the pipes/hoses to and from the compressor could be routed up through > the air plenum and perfectly sealed, so that hot air from the engine > compartment never will leak through. An easier task would be to mount it like "normal" then make a sheet metal shroud kinda like the one for the gen belt around the A/C belt. > A wild idea, perhaps, but is it a good or bad one? Any thoughts? It's not a _bad_ idea - I was tossing the same thing around in my head for awhile, too! But, it is certainly a very difficult one. Oh, and BTW, the Sanden compressors are all reversible, so there is no issue of it running counterclockwise (like your setup describes and like my T4-in-T3 setup is) verses clockwise (like normal). Take care, Shad Laws LN Engineering http://www.LNengineering.com ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/ </x-charset>