Electronic superchargers, ebay chips dont work im afraid. If they did every car would have them. You could try fitting a valver fuel pump and eventually get a re-map. I got a valver fuel pump you can have quite cheap, just needs the filters changine. For 100 bhp you will need head and inlet work, cams, and the laguna throttlebody, 4-2-1 manifold, re-map, exhuast system. Costs a bit of money, well over a grand, prob nearer 2 or 3