On Wed, 24 Sep 2008 11:15:34 GMT, Ross Herbert
wrote:

On Tue, 23 Sep 2008 15:26:42 -0400, default wrote:

oes anyone have a schematic for a simple four pin HEI ignition module
:from 1970's+ ignition systems. They appear to contain an SCR and a
air of diodes and resistors.
:
:Pickup Coil connects to two terminals and battery and induction coil
rimary the other two, mounting screw provides a ground connection.
:
:Original type mounted to the distributor plate on GM cars and others
:and was ~1/4 round shape - I want to adapt it to a motorcycle that has
ickup coils mounted remote from the modules.



Most 70's era street bikes would run from the 12V battery supply so you would
have to buy a kit suitable for this power supply. I don't know where you are but
here is one kit http://www.jaycar.com.au/productView.asp?ID=KC5442

The bike is 80's runs from the battery. They call it a CDI but it
isn't - runs from 12V with no HT generator coil - the module just has
4-5 components in it (potted in black goo) induction coil is ~3.5
ohms.

The advance is managed in the pickup coil end of things.

The dealer wants $200 per module and I need two for a bike worth
~$1,000. The 70's style module for cars runs about $40 now (was $15)
each.

If your bike doesn't have a battery which is chaarged from an
alternator/generator then it will probably use an generator supply winding to
produce the input voltage. In this case a simpler kit can be used
http://www.jaycar.com.au/productView.asp?ID=KC5466

Physically too large even if it was suitable. The originals are only
one cubic inch with mostly heat sink.

turned this up in my searching
http://members.aol.com/pullingtractor/ignition.htm
Interesting site with lots of DIY mods for small gas engines.
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