Magnetoman,
I understand all the figures you've given me , as I said initially I just trying to cobble together a V twin magdyno for another application and wish to understand a couple of things better.
At present I have two good sparks BUT if I move the cam slightly in one direction one spark fades out, and if I move the cam ring slightly in the other direction the brass segment in the slip ring no longer coincides with the pick up, this is because in a magdyno the pickups are 90 degrees out of position compared to a KVF (in relation to the magnets and armature) hence the need for special slip ring with an extended brass segment (I have an article in a Brough technical publication explaining how to convert single cylinder ones to this) which I am doing.
What I'm trying find out as I asked initially is it better to have the second spark early or late, irrespective of which cylinder is which.
Just a thought here, if I timed the cam the other way with what is currently with the #2 spark as the one at max flux the #1 spark would be 25 degrees early (instead of the current #1 spark at max flux and #2 spark late by 25 degrees)
When retarded would I have better sparks as the would now be approximately #2 spark say 12 degrees after max flux and #1 spark around 13 degrees before.
At present they would be #1 spark 12 degrees after max flux and #2 spark 37 degrees after.
Chris.
I understand all the figures you've given me , as I said initially I just trying to cobble together a V twin magdyno for another application and wish to understand a couple of things better.
At present I have two good sparks BUT if I move the cam slightly in one direction one spark fades out, and if I move the cam ring slightly in the other direction the brass segment in the slip ring no longer coincides with the pick up, this is because in a magdyno the pickups are 90 degrees out of position compared to a KVF (in relation to the magnets and armature) hence the need for special slip ring with an extended brass segment (I have an article in a Brough technical publication explaining how to convert single cylinder ones to this) which I am doing.
What I'm trying find out as I asked initially is it better to have the second spark early or late, irrespective of which cylinder is which.
Just a thought here, if I timed the cam the other way with what is currently with the #2 spark as the one at max flux the #1 spark would be 25 degrees early (instead of the current #1 spark at max flux and #2 spark late by 25 degrees)
When retarded would I have better sparks as the would now be approximately #2 spark say 12 degrees after max flux and #1 spark around 13 degrees before.
At present they would be #1 spark 12 degrees after max flux and #2 spark 37 degrees after.
Chris.