How to Build an Electric Supercharger Kit
If you have an electric supercharger, there are a number of ways to mount and wire it. Some people choose to switch the mechanism manually, while others prefer to activate it by a full-throttle switch like a nitrous system. As these systems will most likely be used only under extreme acceleration, this article will focus on the full-throttle activation method and will focus on centrifugal-type blowers like those from Auto Accessories.
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Things You'll Need
- Aftermarket Short-Ram intake system (ex: Weapon R)
- 3-inch piece of 4-inch-diameter rubber tubing
- Two 4-inch-diameter hose clamps
- Flat-head screwdriver
- Full-throttle activation switch
- Switch mounting bracket for you vehicle
- Full set of wrenches
- 20 amp capacity, 12-volt automotive relay
- Drill
- Hexagonal sheet-metal screw bit
- Five self-tapping sheet-metal screws
- Electrical connector kit
- 20 feet each of 16-gauge red, black, green and yellow wire
- Wire cutters/crimpers
Instructions
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1
Install Short Ram intake system on your car as per manufacturer directions, but do not install air filter.
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2
Install hose clamps on either side of tubing section, do not tighten.
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3
Install tubing section on the end of intake tube and tighten hose clamp with flat-head screwdriver.
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4
Slip electric supercharger outlet tube into tubing section, ensuring that there is at least 8 inches of open space in front of the center air inlet on compressor. Tighten clamp.
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5
Install air filter onto turbo inlet, just as you would have on the original intake tube.
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6
Install full-throttle activation switch onto throttle body, as specific to your application. Procedures will vary.
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7
Adjust throttle switch to activate at full throttle only. Procedures will vary.
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8
Place relay on fender well, near intake tube. Attach to body with self-tapping sheet metal screw through hole in plastic relay tab.
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9
Cut 4-foot lengths of: one green, one yellow and two each red and black wires.
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10
Connect female quick-disconnect fittings to one end of each length of wire.
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11
Strip 1/2-inch of insulation from the non-fitting end of the black wires.
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12
Connect one red wire to "power-in" side of relay and opposite end of the wire to whatever power source you would like to use.
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13
Connect other red wire to "power-out" side of relay. Connect free end of this wire to the red spade terminal on the supercharger with a female quick-connect fitting.
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14
Connect one end of yellow wire to "signal-in" terminal on relay and the other to "signal-out" terminal on full-throttle switch with appropriate connector.
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15
Connect one end green wire to "power-in" throttle switch terminal with appropriate connector and the other to power source of your choice.
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16
Loosen wire connector going into the negative battery terminal with 1/2-inch wrench.
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17
Slip stripped ends of both black wires into space between wire and terminal body and re-tighten.
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18
Connect one black wire to ground terminal on relay and the other to black spade terminal on compressor motor.
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Tips & Warnings
Due to a lack of clearance, some installations will require using an in-line type supercharger. Try to avoid using this type, since centrifugal blowers are far superior.
Installation particulars will vary from vehicle to vehicle, as will wire routing and ground connections. Have a variety of connectors and wrenches available.
