pamcopete
XS400 Enthusiast
The new E-Advancer for the Yamaha XS400 is now available. www.xs400ignition.com
Looking good.
Out of curiosity, what's the limiting factor on the coil primary resistance/current? Lack of heat sinks on the MOSFETs?
Yes, that is correct. The price point objective was less than $200 and that was achieved by using a plastic box and no heat sinks among other design features. There are not that many suitable coils for the XS400 that are less than 4 Ohms and we also wanted to encourage the use of stock coils to keep the installed cost down. The IGBT transistors will actually carry more than 10 Amps without a heat sink, so it was really the choice of an inexpensive plastic box rather than an aluminium box that could act as a heat sink.
The blue box is from Hammond manufacturing in Guelph, Ontario, by the way.
Last stupid question. Dwell angle, 60 vs 105 degree stock?
I imagine it's a lot more efficient than points and doesn't need to charge the coils as long?
It'd answer a question in another thread about your igntions being better on the alternator.