Hi all,

I'm working on fitting a edis style trigger wheel inside an A series points distributor. The small 63mm laser cut wheel I got off Trigger-Wheel for 31 pounds (http://www.trigger-wheels.com/store/contents/en-uk/d5.html). It fits inside the upper part of the distributor with a small amount of clearance ~1mm.

I need some help making a bushing up since I don't have access to a lathe. All I need to do is machine a 7mm pilot and a 12.4mm diameter shoulder onto a 20mm long piece of 3/4 hex bar. I don't have the material either. (A bit bigger/ smaller hex would be fine). I'm in the northern suburbs of Melbourne and would appreciate help with a lathe or being pointed in the direction of a machinist. Plan is to cut an M8 thread into the distributor shaft and bushing and fix it all with a lock nut. Happy to supply the pdf workshop drawing.

With that bit done I'll fit a sensor into the side of the distributor and I'll have a cam trigger wheel to run coil on plug.

Attach file:

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  Bush.jpg (50.49 KB)

Did you ever get this set up working? Looks awesome!

The distributor runs at 1/2 the speed of the crankshaft. So will using a crank trigger wheel work in the distributor?

I did get it working but it wasn't reliable, once it got to ~5500 rpm the trigger signal went haywire. I suspect it was because the sensor was too large. I tried to focus the sensor area with a piece of steel because the tooth gap was only 2-3mm. There was also a little run out on the distributor shaft. I cut my losses and used a conventional edis4 crank wheel setup.

Yeah the shaft runs at 1/2 rpm but I used an edis8 module to drive it. It also meant all the timing values in the ECU had to be half of the desired value.

good to know

A low-profile crank trigger wheel takes almost no room.


Super-simple to install, needs no machining as the crank bolt alone will hold it in place. The photo shows a set-screw/bolt, but it is not needed (there is no load on the trigger wheel, so the center bolt will hold it in place perfectly)

One of those sheet-metal wheels can be fabricated out of thick sheet. DIYAutotune sells 1/8" thick version for $29

I used a nice-looking $5 cast trigger wheel from the junkyard but it did add about 10 mm to the front of the crank. It looked superb to my eyes. I used a flat plate bolted to the engine cover to mount the sensor (which look homemade, but oh well...)



You could easily put the sensor to the bottom of the engine, wherever there is room. The trigger wheel can be rotated to put the missing tooth 6 teeth away from the sensor

I see that DIYAutoTune now sells trigger wheels for Nissan Optical CAS so that's another option, for example using an FJ distributor in the A-engine