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How to Build Supercharged Mini V8s

There are many types of internal combustion engines, from 2-strokes to four-strokes, diesels and rotaries. Each type of internal combustion engine can be divided into two classes: naturally aspirated or forced aspiration. Superchargers, sometimes called blowers, are among the forced induction systems. Conceptually they are the same on any scale, whether you're building a small-block V-8 or machining a scaled miniature model of supercharged V-8. The following instructions are intended for experienced mechanics.

Things You'll Need

Machinists lathe or vertical mill
Micrometer
Wrenches and sockets
Screwdrivers

Instructions

- 1
  Fabricate a supercharger housing that will fit your intake manifold. In addition to fitting the manifold, the design must create enough cubic feet of air per minute to feed the engine more than it could draw into itself using only the vacuum.
- 2
  Machine an intake port and an outflow port in the supercharger housing. The intake port will be the smaller of the two openings. The outflow port should match the intake profile of the intake manifold.
- 3
  Fabricate two interlacing worm gears to create a positive displacement pump. Design them so the gear tips nearly touch the inside of the supercharger housing. Install the first of the gears in the housing on high quality bearings.
- 4
  Extend the pulley axle of one of your crankshaft driven pulley, so a second pulley can be added. Slide a second pulley on. It must be fastened to the axle so it does not spin. This can be done in a variety of ways, from a splined axle to a D-shaped axle to a set-pin.
- 5
  Fabricate a gear axle for the second gear which extends beyond the end of the gear. Machine a hole in the supercharger housing that allows the gear to be mounted on high quality bearings, with the long end penetrating through the housing towards the same plane as your new crankshaft-driven pulley. Install the second gear. Install the supercharger assembly onto the intake manifold.
- 6
  Attach a pulley on the end of the gear axle which extends through the supercharger housing. The supercharger pulley must be aligned in the same plane as the crankshaft-driven pulley, so they can be linked together. Add a belt, connecting the two pulleys. Starting the engine will now drive the crankshaft, which in turn will drive the supercharger, which will force more gas and air into the engine, creating more power.

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