Converting internal coil to external coil distributors.

[2point6]

This is a basic "how to" showing the steps I took to change a internal coil from a f22a to an external coil h22a distributor. What makes this conversion tricky, is that the USDM h22a Distibutor used comes originally set-up for an external coil.

On the right side of this picture is the (internal coil) distributor from the f22. We will take the parts from this and add to the H22a (external coil set up) distributor on the left.

Here is what the internals look like side by side.

Start by removing the coil. Disconnect the wires leading to the coil. There are 2 phillips head screws that hold the coil in place. Transfer the coil to the h22a distributor housing.

Now we will get into the wiring. This step shows to disconnect the green wire from the h22a ignitor.

In this next picture You can see the jumper (yellow wire/coil negitive) That was removed from the f22a distributor and in place on the h22a.

With the coil in place and the negative jumper attached, we will now work on the positive connection. This following picture shows that right next to the green wire (that was disconnected) is the black with yellow stripe. You will cut this wire aproximately half way between the connector and the plastic tubing. From the f22a distributor you will disconnect the same wire and cut in the same place. This should leave you with a "Y" connection with the connector for the ignitor on one end and a ring terminal on the other. The 2 cut ends will be soldered together. Transfer this wire to the H22a distributor. This will be the only (non factory) connection.

Strip the black/yellow stripe wire and solder and heat shrink the ends together.

Back to this picture for a second. The disconnected green wire can be left in place just be sure to tape it up good so it wont get caught on any of the rotating parts. I however cut it off at the tubing and pull the wire out of the distributor all together.

Here is a shot of the connector with the green wire removed. This wire is completely removed all together as an extra precaution.

This is what the completed distributor should look like. Almost completely factory.

[coupe]

:O wow... maybe one day, when i have the extra time... or even the inspiration to do it. some extra distributors would help tho, i do have a f22b1 but not sure about it... oh no ive gone crosseyeedded

[Chris]

Stickied for later addition to tech articles...

[Gennady]

Wow! Great Job.

[Andrew]

out of curiousity.. why would/did you stick with internal coil???

I converted to external 3 years ago after getting tired of replacing internal coils (not to mention their limiting factors).

[coupe]

not saying i WANT to stay internal... just saying its prolly something ill leave till the end.

[Andrew]

yah i thought about it more, and for someone swapping on a budget this would be real nice.

[2point6]

That was basically the choice here. I would much rather use an external coil. I just posted this info because it comes up somewhat frequently. I will also post the same type of write up for going to the external coil. Just give me a bit.