RE: TURBOCHARGER on my nitro car, and it works
The RBInnovations supercharger does not in fact "supercharge" RC engines. The extra air that is forced in through the carb merely blows out through the exhuast port as killer89 mentioned before. Therefore when the air and fuel is forced out of the exhaust, you are merely leaning the engine by taking away the fuel and replacing it with air. Therefore, instead of paying $180 for a heap of metal, you can just lean out your engine. Also you have to realize the supercharger is draining HP and torque from the engine by giving extra load to the engine to spin the vanes.
BTW, shvdcat if you want to race supercharged, watercooled engines, why don't you come on down and race my Charger. Then afterwords I'll smoke you with my Rustler.
P.S. I believe he is running a traxxas engine, not a marine engine. So he did have to modify it.