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Ignition System Upgrades

This is a gather of information from multiple sites for ignition options to tracksters or other 2 or 4 stroke engines.
Sites:
http://www.smokstak.com/forum/showthread.php?t=92789&highlight=tecumseh+coil(external link)
http://home.comcast.net/~loudgpz/GPZweb/Ignition/GPZheiModForPoints.html(external link)
http://www.buggiesgonewild.com/gas-ezgo/36840-4-stroke-hei-conversion.html(external link)


Required parts:
Borg-Warner Part Numbers
E51 Twin Towner Coil (aka DR39) (15.00)
CBE4 Ignition Module (HEI 4 prong module) (15.00)
MSD 8891 Coil Stacker Interface (optional mount for the coil)(20.00)

Phase 1: Replace the CDI Amplifier and OEM coils, with a GM HEI module, a small circuit, and a common two piston coil. Later, Phase 2 will replace the points with a proximity Detector.

Circuit to use the current points:
4.7k Ohm 1/4 Watt Resister (3.00 pack of 10)
2N2222 NPN Transister (10.00 pack of 10
4x6cm Universal Printed Circuit Board (optional as component legs can be soldered together) (5.00 pack of 10)

Using the diagram from "http://home.comcast.net/~loudgpz/GPZweb/Ignition/GPZheiModForPoints.html(external link)" I built the following circuit to use the points to trigger the HEI module. Will the planned housing I placed thick double sided tape on the back.

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The HEI Module needs to be attached to something to something (heat sync) to keep it from overheating. I found a couple of these housings on ebay.

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I cut one slightly larger than half.

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I then took what was left and cut the sides off to give me a base plate to attach the sync housing and the coil to.

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Make sure and file off the plastic posts from the HEI module before installing to make sure the whole module sits flush against the metal. Cover the whole back with heat sync paste.

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Continuing with the wiring diagram, everything is wired together, leaving the positive wire, housing to be grounded or a ground wire, and the wire to the points.

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With winter here I have not yet got to test the system as the trackster is currently being used to plow snow at our apartment building.



Phase 2 will replace the points with a proximity Detector.

For Position Sensor:
CSS81 Cam Position Sensor (25.00)
PT5742 Connector for the sensor (25.00)