gee, that's a neat engine. Looks like a aeroplane engine or a BMW motorcycle.
another way to 'turbo' is to use a leafblower with some NOS. watch the blue GMC ute.
http://www.youtube.com/watch?feature=player_detailpage&v=pMcIH0SQGPQ
problem with that is blow-through, it's been done, I know, but on 4-strokes because blow-through isnt an issue thanks to the valves. I even saw a video of a guy getting 20 extra hp from blowing N2O generally around the intake. What you're thinking of is more or less a supercharger, requires another source of power to run it (most cases it's an engine belt, but weaker, electric ones do exist as well and would be the equivalent of using a leaf blower, my friend did this with his honda: at my old job an oven blower fan needed to be replaced so he used the old one, and it added a bit of extra power.
A real turbo introduces resistance into the exhaust, which due to the nature of the spindle, makes exhaust essentially think its a variable length expansion pipe, boosting power throughout the whole range of the turbo. Then in turn it pushes more air in = bigger bang = more exhaust, and so on. The resistance doesnt allow much blow-through and because of the resonance effect, will actually help the motor be more efficient (Which isn't possible with a supercharger, it will work, but only at a specific RPM will the exhaust prevent much blow-by). the motor (according to some very generalized calculations) only sucks in 10CFM of air at a whopping 8500 RPM, so in theory even a good computer fan could help alot (most 120mm fans I've seen push around 80-110 CFM, some high power ones up to 220CFM). Of course you'd also want high static pressure, which from my understanding, is how much pressure a fan can cram into a finite area before the pressure pushes back through the spinning fan blades. High static pressure will allow the fan to cram as much air into that engine as fast as possible before it closes (allowing it to build up pressure before the next opening and repeating the process).
For example, these bad boys are considered high static pressure (note how close the fan blades get to the rim?) and push around 6x the air the motor draws, theoretically enough for these motors to rev to 27,000 RPM (of course other factors such as materials, friction, porting, etc. also come in to play to limit your speeds). But if I can find a properly sized funnel, I may give it a shot.
http://www.ncix.com/products/?sku=70461&vpn=CO-9050008-WW&manufacture=Corsair&promoid=1360
