Suggestions for race ignition coils?

davomoto · Post by **davomoto** » Thu Feb 25, 2010 6:22 pm

Yes, needs a rectifier, regulator not required on CB CLs .

davomoto

rbaselt · Post by **rbaselt** » Thu Feb 25, 2010 7:30 pm

Davo, I don't know what a computer-grade capacitor is. Could you maybe find something on ebay as an example of what is needed? Would one capacitor be sufficient for a 2-coil system? Thanks!
--Randall

teazer · Post by **teazer** » Fri Feb 26, 2010 12:37 am

You are using DC coils then the capacitor is simply replacing the battery, so it is one per bike.

I'll let Davo respond to the capacitance issue.

rbaselt · Post by **rbaselt** » Fri Feb 26, 2010 6:42 am

Teazer,
Thanks for the capacitor help. Yes, the photo is a CR72, it uses a small 2-coil alternator, no rectifier or battery, and the original coils are about 0.9 ohm. They are referred to as the energy transfer type. --Randall

davomoto · Post by **davomoto** » Mon Mar 08, 2010 4:58 pm

Randall, sorry just got caught up on this post! Here's an example from ebay, same mfd rating I am using, but you want to have a higher than 12volt rating, mine is rated at 20 volts.

davomoto

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... MEWAX%3AIT

rbaselt · Post by **rbaselt** » Mon Mar 08, 2010 6:56 pm

davo,
Thanks for the capacitor link. I just bought a Honda C100 coil, it is a 6 volt AC coil that presumably would not need a capacitor or rectifier. It is 3.5 ohm, however, compared to the 0.9 ohm of the original energy transfer coil. I'll give it a try to see if it will generate a spark by simply turning the engine over. --Randall

davomoto · Post by **davomoto** » Mon Mar 08, 2010 9:31 pm

Yes, I remember as a young guy running my SL100 straight off of the ac generator, just one wire to the coil, after stripping every light and wire off of the bike!

davomoto