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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Conversions >> Homebrew ignition?
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Homebrew ignition? - 10/11/2009 7:37 PM   
Scota4570


 

Posts: 182
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Joined: 1/8/2009
Last Login: 3/21/2010
From: Salinas, CA, USA
Status: offline 		I've seen the open source CDI post on this site. That is more than I want to get into. I do make tube radios as a hobby so, I am no stranger to a soldering iron. For fun, I was thinking of making one of these,

http://www.floridaame.org/GalleryPages/IMG2008/DFK/IgnitionMoreTransistor.pdf

The only hang up is the coil. I can't find good specific information about winding one. Can I use or adapt the magneto coil off a chain saw etc? What would be the specs if I used a little choke or transformer and rewound the secondary. I was thinking a little power supply choke that put out 600V B+ and had a 6V filiment winding would step up to a bunch if used it backwards. Could I use a fly back transformer? I do not want to buy a coil, on general principle.

It seems I could make a mechanical ajustment to retard the spark for starting.



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RE: Homebrew ignition? - 10/11/2009 9:08 PM   
Patxipt


 

Posts: 522
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Joined: 10/13/2006
Last Login: 3/21/2010
From: lx, PORTUGAL
Status: offline 		The coil is a regular TCI/non-CDI automotive coil. The smaller ones available are motorcycle coils.

Good luck!

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Once you hear the sound of a multicylinder 4-stroke, you''ll be hooked forever!

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