Single fire ignition.
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
I thought the VOES is only for retarding at lower RPM, not at 3000-3500? Will I be able to set my timing more advanced with the VOES restored?
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
1997bagger, He does not use a VOES on his hot rod bagger either.
Club Member
Joined: Apr 2011
Posts: 5,764
Likes: 7,798
From: SE Louisiana
Dyna S does not use a VOES, it has advance weights and the advance is all in by 2000rpm.
Aces, you said your weights and springs are modified, so it may advance quicker than that or slower or how much it's advancing.
Might want to recheck the static timing to get a reference where the stock timing would be, mark your module, and go from there.
page 2
http://www.zodiac.nl/instructions/232290.pdf
or get a programmable ignition and cable & software, test and find out which canned map works best, then tweak that map where needed.
Just something else to think about,
I don't know if maybe that yost powertube has you a little lean in the mid range under hard accel,
a smaller air bleed jet will let the main jet come in sooner.
Aces, you said your weights and springs are modified, so it may advance quicker than that or slower or how much it's advancing.
Might want to recheck the static timing to get a reference where the stock timing would be, mark your module, and go from there.
page 2
http://www.zodiac.nl/instructions/232290.pdf
or get a programmable ignition and cable & software, test and find out which canned map works best, then tweak that map where needed.
Just something else to think about,
I don't know if maybe that yost powertube has you a little lean in the mid range under hard accel,
a smaller air bleed jet will let the main jet come in sooner.
Cruiser
Joined: Sep 2008
Posts: 185
Likes: 0
From: North Myrtle Beach, SC
As "Pop" always told me, "Sonny Boy, If It Ain't Broke Don't Fix It". I also have a single fire on my Evo Bob-ster and I can't tell crap for difference between single or duel.
I've been looking at the VOES switch hanging on the Flat Black Bagger I'm building... Hummmmm?
I've been looking at the VOES switch hanging on the Flat Black Bagger I'm building... Hummmmm?
Road Warrior
Joined: Apr 2007
Posts: 1,952
Likes: 15
From: Senoia, Ga., by way of Miami, Fl..
Something to think about with the VOES, while I'm no expert on them, they rely on vacuum to operate and adjust your timing based on the vacuum produced in the intake. A strong engine with larger cam will not produce the same vacuum as stock. So, is it needed?? I guess it depends on your package, but it certainly needs to be calibrated for your engine package, if you have one. I tend to believe a good ignition system should do the job w/o it..
Thread Starter
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
Dyna S does not use a VOES, it has advance weights and the advance is all in by 2000rpm.
Aces, you said your weights and springs are modified, so it may advance quicker than that or slower or how much it's advancing.
Might want to recheck the static timing to get a reference where the stock timing would be, mark your module, and go from there.
page 2
http://www.zodiac.nl/instructions/232290.pdf
or get a programmable ignition and cable & software, test and find out which canned map works best, then tweak that map where needed.
Just something else to think about,
I don't know if maybe that yost powertube has you a little lean in the mid range under hard accel,
a smaller air bleed jet will let the main jet come in sooner.
Aces, you said your weights and springs are modified, so it may advance quicker than that or slower or how much it's advancing.
Might want to recheck the static timing to get a reference where the stock timing would be, mark your module, and go from there.
page 2
http://www.zodiac.nl/instructions/232290.pdf
or get a programmable ignition and cable & software, test and find out which canned map works best, then tweak that map where needed.
Just something else to think about,
I don't know if maybe that yost powertube has you a little lean in the mid range under hard accel,
a smaller air bleed jet will let the main jet come in sooner.
Wish I could fly you in to fine tune this beast. Also my Indy used the medium springs so I should be OK there. Indy also said the advance is already done before 3000 rpm.
Last edited by aces&8s; Mar 12, 2014 at 04:57 PM.