How to Install an HHO on an Older Car
Older vehicles can accommodate HHO, or Oxyhydrogen, more easily than fuel-injected models. Using simple hardware, the HHO device can be connected to the carburetor easily; the carburetor must be adjusted mechanically for a lean burn after the device is connected. The average backyard mechanic can install an HHO generator into a carburetor-equipped car in about an hour.
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Things You'll Need
- Four feet of 1/4-inch fuel hose
- Hose clamps
- 10 gauge wire (20 feet)
- Electrical tape
- Screwdrivers
- Wire stripper
- Flashback arrester
Instructions
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Determine the entry point for the HHO output on the carburetor. Most installations will have the HHO run into the air intake, to mix with incoming air. Some aftermarket carburetors will allow for running the HHO through a service vacuum port, attaching the fuel line to the port with a hose clamp.
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Run a length of fuel line from the HHO generator output nozzle to the air entry point, with a flashback arrester in-line. If using the service vac port, secure a hose clamp to the line and turn it clockwise until it is tight. The HHO generator inlet can be run to a small air filter, or left open. The vacuum of the engine running will draw the HHO into the carburetor to mix with the gasoline. If the carburetor backfires, the flashback arrester will prevent the HHO generator from exploding.
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3
Connect the positive terminal on the HHO generator to an "ignition-only" hot terminal in the vehicle. A good choice is the fuse panel, as some older cars will have empty terminals that are switched on with the ignition. The generator can also be run through a switch, for user control. The HHO generator should not be wired directly to the battery, because it will continue to produce gas when the car is switched off. The negative power terminal on the generator can simply be grounded to the body of the car.
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4
Adjust the carburetor to accommodate the extra fuel. This can differ from one carburetor to another, but there are commonly two idle adjustment screws on the front of most models, with a mechanical adjustment method for upper-cruise mixture settings. This method can be replacing the metering rods, or making adjustments to the jets and floats of some stock carburetors. It is easier to work with aftermarket carburetors and HHO gas; during the 1980s, some OEM manufacturer's carburetors were computer-controlled, complicating the installation.
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Tips & Warnings
Use a flashback arresting device when adding HHO to a carburetor.
Use extreme caution when working around flammable gas.
