How can i make supercharger for 4hp-100cc-2 stroke?got idea please give me sugg.

I would think the more basic 2 stroke tuning techniques could be tried first at relatively little cost, opening ports, piston skirt trimming ,crank case/ lywheel stuffing, head skimming to increase compression ratio. Re-jetting the carb, tuning the exhaust etc
It would be an idea to see if the main & big end bearings are meaty enough to take the extra power first.

Del

I don't suppose there would be a turbocharger that small available? That would be ideal.

As was mentioned in a earlier post the design of a gasoline 2-stroke doesn't lend itself well to turbo or supercharging. Since the engine he is using is from a snowblower it is probably in a low state of tune and would respond to normal 2-stroking tuning techniques.

Sooo...Same suggestions as Del --> More power would be obtained from altering the port timing, raising the compression ratio, increasing volumetric efficiency, carburation changes and ignition timing.

The additional weight of the extra batteries, electric motor, "blower" and weight of the engine itself added to the scooter would cancel the small power increase that might be obtained from that setup.

Don't forget an expansion chamber modified to fit from a racing go-kart or such. If you research and build it yourself it is probably the easiest and cheapest power adder per dollar. Then you can tear it apart and work on the ports and crank stuffing. If the crank doesn't already have needle roller bearings and you or someone you know is handy at machining, rework the crank for that modification.

There are a lot of snow blower repair shops that might let you dig through their pile of junk and take what you want just to get rid of it, especially if you let them know you are trying to trick out an engine for laughs. They are a good source of ideas and might even get involved.