Do-it-yourself multi-electrode candle from a regular one

There are three-electrode spark plugs on the market. They are not cheap and are not sold for all engine models. Many who have used multi-electrode spark plugs in their practice note more stable engine operation at both low and high speeds. In this master class you will learn how to convert a regular spark plug into a multi-electrode spark plug.

Converting the spark plug into a six-electrode spark plug

It is highly advisable to use a new spark plug that has not been used. We fix it in a vice. Using wire cutters, bite off the side electrode.

We place the threaded body into 6 equal parts. To limit the length of the cut, we wrap the thread of the candle with a piece of electrical tape. We cut the slots with a grinder.
For this operation you need to use small circles, scraps that are usually thrown away. They will be much more convenient to work with.

We make six cuts, each time loosening the vice and turning the candle over.

We remove bends and chips from the inside with a thin screwdriver, which usually form during sawing.

Using pliers, bend the electrodes towards the center, controlling the same distance of 1-1.5 mm with a probe.

The draft is ready.

Using a flap sanding wheel, we grind down the thick edges, making them sharper towards the center.


We reduce the graininess of the circle and bring the side electrodes to a shine.

The result looks very nice.

In the working nest.

Tests

Let's make a visual comparison of the performance of our sample with a regular candle and a three-electrode one.
Regular spark plug:

Three-electrode:

Self-made six-electrode:


The discharge power is noticeably higher, but the point here is not in the design itself, but in the fact that this specimen was made from a candle with low internal resistance, and not from a standard design.
I don’t know how to do it for a car, but making such a candle for a motorcycle is very good.

Watch the video