Dyna S to Points
Thread Starter
|
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,210
Likes: 3,040
From: St.Louis Mo.
Dyna S to Points
A buddy of mine wants to go back to running points and keep his duel coils and duel plug setup. Anyone have any idea how to wire the coils up ? I'm thinking the wire from the points will go to the neg. side of the coils and then the 12 volts to the positive side of the coils. What do you think ?
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,569
Likes: 3,324
From: Cental, MI
Not gonna be OK... Dual coils are generally like 3 Ohms some are 5... but, mostly 3...
If you put the coils in parallel the Points will see less than 3 ohms... if they are 3 ohm coils and less than 5 if they are fives... either way... points life will suffer... However... if you have 3 ohm coils, and you wire them in series.. the points will live.
No More Single fire, of course... but dual plugs still light the fire in two places vs one... so yea still an advantage...
I can draw you a schematic if needed... but, points trigger to one side, lets say neg, of one coil, then pos of that coil to neg of second coil, then, 12v on pos side of that second coil... it will be fine.. If one of those 4 tower coils... IDK... I would Not...
BTW if the points setup is dual points, single fire.... just wire it like the dyna-S was...
If you put the coils in parallel the Points will see less than 3 ohms... if they are 3 ohm coils and less than 5 if they are fives... either way... points life will suffer... However... if you have 3 ohm coils, and you wire them in series.. the points will live.
No More Single fire, of course... but dual plugs still light the fire in two places vs one... so yea still an advantage...
I can draw you a schematic if needed... but, points trigger to one side, lets say neg, of one coil, then pos of that coil to neg of second coil, then, 12v on pos side of that second coil... it will be fine.. If one of those 4 tower coils... IDK... I would Not...
BTW if the points setup is dual points, single fire.... just wire it like the dyna-S was...
Thread Starter
|
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,210
Likes: 3,040
From: St.Louis Mo.
I think i get what you are saying, but his coils are 5 ohm and he's got it wires like i was saying above. Both negs. to points and both pos. to 12 volts. Are you saying this would be wrong ?
Club Member
Joined: Mar 2009
Posts: 66,106
Likes: 51,387
From: Niles Canyon Ca.
Sure seems like that's a backwards step, never ran dual coils with points. I have run a splitter tower that plugged into a single coil that used 4 wires, found the points pitted out faster when using it, was actually what got me to go to the Dyna S in the first place.
There's a couple different dyna coil setups and they wire a bit differently depending on what you'r doing and which dyna-s unit is there. Makes a difference including which hole the plug wire from what coil goes where.
May be worth a phone call to dynatek to find out so nothing gets cooked.
There's a couple different dyna coil setups and they wire a bit differently depending on what you'r doing and which dyna-s unit is there. Makes a difference including which hole the plug wire from what coil goes where.
May be worth a phone call to dynatek to find out so nothing gets cooked.
Seasoned HDF Member
Joined: Apr 2010
Posts: 9,524
Likes: 7,861
From: Long Island, New York
Better to spend your time convincing him not to go backwards to points. No advantage to points. Yeh I know, "I can fix it on the side of the road". And with points you will need to , with electronic ignition you will not need to fix anything. Once in 10 years thing to fry one, if even then. My opinion, good luck.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,569
Likes: 3,324
From: Cental, MI
I also personally like Single Fire on dual plugged heads... otherwise... Dual Fire is just fine...and single fire shows No Performance Advantage... with single plug heads..
Thread Starter
|
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,210
Likes: 3,040
From: St.Louis Mo.
Well he's thinking the Dyna S is bad because it won't let him time the bike. Can't static time it or time it with a light. If he uses a test light it just stays lit all the time. Installed points and it's doing the same thing. It will not let you time it static or with the light. It runs good. He has to have something else going on as the big just went back together after being down all winter. Thanks guys for the help.
Trending Topics
Club Member
Joined: Mar 2009
Posts: 66,106
Likes: 51,387
From: Niles Canyon Ca.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,569
Likes: 3,324
From: Cental, MI
Agree... those mechanical advance units still require Maintenance... Points or Dyna-S... For my Youngest... Not a problem, he does the maintenance... the Eldest???? Nope, he gets the "Cup" trigger, and full EI...
Thread Starter
|
Seasoned HDF Member
Joined: Oct 2012
Posts: 11,210
Likes: 3,040
From: St.Louis Mo.
.
I'll post again when he gets to the bottom of this problem.