Single fire ignition.
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From: NW AR
I think the one advantage of the non-waste-spark systems is you can adjust the timing individually, at least with some systems. "I've heard" people say that retarding the rear cylinder 3 degrees is helpful. Never tried it myself, and that was with top fuel drag bikes, so may or may not apply to a street bike.
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From: almost there
Thanks Doc, the reason I brought this up was my timing is now fairly retarded to keep from a barely audible slight ping at 3000rpm under wot. My thought being with an adjustable ignition, I could get a more "advanced timing" with the adj timing curves.
Seasoned HDF Member
Joined: Aug 2007
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From: NW AR
Well, depending on what you have now for an ignition and what you have done to the bike, that can lead to pinging. A fully programable ignition curve on a custom built high compression motor would be a good thing. You wouldn't necessarily need the individually fired stuff, just programable.
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From: almost there
I havnt really had a ping problem unless I try to advance the timing, then it's very minimal hardly audible. It's, 80", EV27, heads built & shaved, 10.1, Dyna S ignition. ETC.
So I believe the better adj ignition would be benefit. It runs great now but I think it can do better in terms of advancing without ping.
So I believe the better adj ignition would be benefit. It runs great now but I think it can do better in terms of advancing without ping.
Seasoned HDF Member
Joined: Aug 2007
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From: NW AR
That 10:1 on an air cooled motor can lead to pinging, certainly. Even the factory motors that were 10:1 pinged. Of course, premium gas only. Does that Dyna S use the VOES? Is that working? Are there different curves or retard settings available for that ignition?
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Seasoned HDF Member
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From: almost there
I only use premium gas and my Indy took off the VOES, said I didn't need it. I never get any ping below 3000 rpm so I don't think the Voes an issue. Idle & starts are great, Take off from dead stop is very quick, no stumble on throttle snap. The Dyna S has no adjustments besides rotating it Advance-retard.
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Seasoned HDF Member
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From: almost there
I think a stock engine you wont need an adjustable ignition. JMHO.
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Seasoned HDF Member
Joined: Sep 2012
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From: almost there
I think with everything discussed, The adj. ignition could give me more advanced setting without the 3000 rpm jingle. which would squeeze better performance and a happier engine.