John .... A very interesting reference to the "Amherst Villers" supercharger. I had never heard of them and would have ordered one if I could fid a web page or source for them (Ha).

Just a note on progress. I bought a spare exhaust header and had the tube for the second cylinder rerouted under the tube for the first cylinder. That frees up significant space behind the generator for the input duct to the supercharger. If my manifold gaskets arrive today, I will install the manifold this weekend.

After the manifold is installed, I should be able to try fitting the unit to determine its final position. At the moment, I am leaning toward utilizing a second crank pulley and using a SLK mounting bracket for the compressor and the generator. The price for the bracket, idler pulley and tensioner is about $300 and would make a clean installation. It would also allow me to adjust the crank pulley size to adjust boost.

I am still looking for an "inexpensive" vacuum controlled bypass valve that could also be adjustable as a blow off valve. Anyone have any good sources or ideas?

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"