What Is Hei Distributor


Is a HEI distributor better?

An HEI distributor is a great piece of equipment for an over-the-road car because it is completely self-contained. But without an external coil, a stock HEI cannot provide a strong spark at rpm levels commonly seen on the racetrack. Engines with higher compression or more horsepower also require a hotter spark. via

How does an HEI distributor work?

The HEI distributor is still an inductive-discharge ignition, but exchanges points for an electronic device called a module. Since this system produces more voltage and amperage output than a point-type ignition, it requires a larger-diameter cap to prevent voltage crossfire inside the distributor cap. via

How do I know if I have an HEI distributor?

Re: How to tell if I have an HEI distributor? Google HEI, look at pics, then look at yours. HEI looks much bigger since the coil is in there, making the cap way bigger. Or look for an external coil and a coil wire going to the top center of the cap. via

Can I convert my distributor to HEI?

When converting from a points-style distributor to an HEI unit on most 1970-and-earlier vehicles, it's a good idea to run a new 12-gauge wire from the BAT terminal in the HEI distributor cap, then splice into the ignition key on the main feed wire (usually the pink one). Remember to also install new HEI plug wires. via

How many volts does a HEI distributor need?

An HEI should have a 10 guage wire run to it. If it's hooked to stock wiring it may not be getting a full 12 volts. Many cars had ballast resistors or resistor wire running to the stock coil. A GM HEI should run on as low as 9 volts but 12-14.5 is required for good performance. via

Does HEI add horsepower?

According to the chart, points makes more hp than stock hei and gain only a couple hp from performance hei. via

Does HEI distributor have dwell?

Instead of having a fixed coil saturation time (dwell) as breaker points did (usually 30° on a V-8 engine), the hallmark of the HEI module was a patented expanding dwell. To confirm the expansion of the dwell, simply connect the green lead of an old tach/dwell meter to the tach terminal on the HEI distributor cap. via

How do you set up a HEI distributor? (video)

What's better HEI or points?

"We recommend converting to an electronic ignition on a musclecar engine over a point-type ignition system for several reasons. Also, HEIs allow full alternator voltage to go through the ignition system, which with our 50,000-volt coil allows larger plug gaps for better combustion and more power. via

What are the signs of a bad distributor?

Symptoms of a Bad or Failing Distributor Rotor and Cap

  • Engine misfires. Engine misfires can occur for a number of reasons.
  • Car doesn't start.
  • Check Engine Light comes on.
  • Excessive or unusual engine noises.
  • via

    Why is my distributor not getting spark?

    A Bad Rotor Or Distributor Cap (cracks or carbon tracks that are allowing the spark to short to ground). Often the distributor cap is suspect. Consequently, it could short out the coil voltage and cause a faulty connection inside the terminal of the distributor cap. The result is a misfire in the spark plugs. via

    How do you test a HEI distributor module?

  • Test for power at the pink BAT terminal. You should have battery voltage w/ the key in the start and RUN positions.
  • Connect the ground side of your test lamp to the battery POSITIVE cable.
  • Remove the cap & rotor.
  • DVOM (meter) still connected to green & white leads.
  • via

    Do you need a coil with HEI distributor?

    Most—but not all—HEI systems have the ignition coil mounted in the distributor cap. A control module and magnetic pickup are mounted in the distributor, in place of a conventional ignition system's breaker points and condenser. via

    How do you convert a distributor? (video)

    How do I convert my distributor to electronic ignition?

    A conversion to electronic ignition can be as simple as removing the old points and installing a new magnetic pickup in the distributor. Your car's ignition system consists of two main components – the distributor and the ignition coil. via

    How many volts does a distributor need?

    The battery supplies twelve volts of direct current. In order to achieve combustion, though, there needs to be about 40,000 to 100,000 volts at the spark plug. via

    How do you check voltage on a distributor? (video)

    How many volts should my coil have?

    The electrical system in your vehicle works on 12 volts, so every component must be based on 12 volts, as well. There is a wire connected to the ignition coil (known as a "hot wire") that carries the 12 volts into the coil itself. via

    Does HEI distributor need vacuum advance?

    See all 6 photos In a GM HEI distributor, vacuum advance is limited by the length of the advance slot. The further the rod travels, the more spark lead the unit provides. Original GM vacuum advance canisters can provide as much as 25 degrees, and possibly even more. via

    What can an HEI system cause?

    An HEI distributor that has a worn pick-up coil or corroded magnetic poles will produce a weak spark, with insufficient voltage to ignite the combustion gases. This can be seen by a sporadic miss when the engine pulls under a heavy load or the vehicle has to climb a hill or steep mountain pass. via

    Does MSD add power?

    Each spark an MSD ignition produces is an extremely high current spark. This is because MSD uses Capacitive discharge technology to produce a very high primary voltage. Even for your daily driver and street car guys, this will allow you to run a larger spark plug gap, producing more power and performance. via

    How do you wire a GM HEI distributor? (video)

    How do you change a HEI distributor module? (video)

    What three types of trigger sensors are used in HEI distributors?

    Most modern electronic ignitions use one of three types of sensors in the distributor (or crank position sensor). They use either a variable reluctor (VR) sensor, a hall sensor, or an optical sensor. via

    How do you adjust the timing on a distributor? (video)

    Where is number 1 on a distributor cap?

    Turn the engine over by hand, until you notice number six valves are on the rock, exhaust just closing and intake opening. Number one will now be in firing position and the rotor will be pointing to number one on the distributor cap. It is usually alongside the clip which holds the cap down. via

    How do you remove a HEI distributor? (video)

    How does point gap affect timing?

    A wider gap will advance the timing. The sooner they open the wider the gap will be. As you increase the gap, the dwell angle will decrease because the points will open earlier. The spark occurs when the points open, hence increased spark timing. via

    How do you tell if you have points or electronic ignition?

    If you do have a standard distributor cap, you can open the cap up and peek inside. A points type ignition will have what are called points (duh) installed in the distributor, just below the rotor (that colored plastic part that spins around when the engine is running). via

    What are distributor points?

    distributor point - a contact in the distributor; as the rotor turns its projecting arm contacts them and current flows to the spark plugs. via

    How often does a distributor need to be replaced?

    Replacing the distributor cap and rotor at the same time should be completed every 50,000 miles, regardless of whether or not they are damaged. If your vehicle does not put on a lot of miles every year, it's also a good idea to replace them every three years. via

    What will a bad distributor cause?

    Since the engine needs that spark to run, a bad distributor can result your car stalling when it idles. 4. Your engine is misfiring: If the distributor isn't providing enough juice to the spark plugs, it can cause your engine to misfire, which typically feels like the engine is stumbling. via

    What happens when a distributor condenser goes bad?

    A failing points and condenser system can cause rough running, misfires, lean and rich conditions. If your vehicle runs rough, the engine will not fire, or the vehicle will not start at all, it may the points and condenser system that is the issue. via

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