timing

[drunkmunkey6969]

yeah.....thats what i thought.

[sideout]

Interesting, automatic retardation due to the period it takes to trigger and then produce the spark being costant versus an decreasing cycle time as the revs increase

I suppose the electronic ignition system was designed for reletively low speed use so wasn't optimised for the sort of revs that a tuned engine sees?

This is probably something which could be seen on a dyno output, if you could grab the trigger v revs data? I'd like to see a graph of the variation of timing (in degrees or time) against revs, anyone done it?

Cheers,

Nigel

Once a few years ago now, When playing around with an Electronic with a 12 volt conversion I used a dual channel Oscilloscope this had two displays on the one screen, and by using two attenuators (one on each circuit) it seemed to show up a time shift when you overlayed the Ignition relative to the pickup pulse, it seems to me to be the time it takes to trigger the Thyristor and then discharge the capacitor in the CDI unit to fire the coil....which causes the Ignition retarding at revs....If this is a fixed time, then as you say as the revs rise it will take longer relative to the decreasing cycle time....

Seems feasible to me Jims, thanks for explaining it!

Nigel