Ignition Modules

They replied with the graph you see below.  Note that the numbers in the boxes don't line up vertically with the chart.  It looks like they're using 29 degrees, rather than the 26 that Rotax has by default.  This would likely explain the higher static RPM that was reported.  They also have some curve, but it's at full advance by 2400 RPM so it's not quite what I'd expect.  They also seem to drop the advance to 0 at 5900, which I'm assuming is to act as a rev limiter.  I asked them to verify that this can be changed with their provided software, but I'm 90% sure the answer to that is yes.  If so, I'll probably order a couple and play with them.  I have an engine on a test stand as well as one on my Onex.  

Thanks,

Rusty

Thanks for sharing the graph it's very interesting, I wonder how they came up with 29 degrees and why they have a curve from idle to 2400rpm.

I got another reply from them:

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You can to adjust it with software. But we are not sure if it will solve your problem.

In software is 29, but realised is 26, because maximal advance is determined by shape of pickup system (by angle length of pulse lobe).

Radical decrease of ignition advance in curve fuction as soft rev limiter.

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It sounds like they're saying this is the same 26 degrees as stock, and the extra 3 degrees is just to compensate for how they read the input pulse. It should be pretty easy to compare the two ignitions with a timing light.  I'll probably order a couple modules, and try them on the test stand engine.  If nothing else, the price is right.  You can literally get 6 of these for the price of one stock unit.  I had to buy a pair of those a few years ago and it was $1800.  

Cheers,

Rusty