Following a ride in my friends new Lotus Exige S I couldn't get the idea of having a supercharger out of my head. The noise and torque is so addictive. I started conducting a little research and couldn't find much for inspiration. A company called TTS Performance produce a supercharger kit for later R1's but sadly not for my 2003 5PW engine.
Not letting the lack of off-the-shelf kits get in my way I have set about creating my own! The main obstacle to overcome is finding a way to get drive from the engine to power the supercharger. Sadly the standard R1 engine does not have any external pulleys to use so I needed to come up with a solution.
I have designed a custom timing chain cover that incorporates a housing for a bearing and oil seal that will hold a custom shaft connecting a pulley to the crank via something called a cush coupler. Cush couplers are used inside superchargers to transfer the nose cone pulley input to the internal rotors.
Eaton M45 superchargers can be picked up on eBay between £100 - 150 at the time of writing. They are often listed using different reference numbers so here is a handy list.