single fire ignition

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Apr 18, 2006 | 03:57 PM

snowyhog

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Cruiser

Joined: Dec 2005

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single fire ignition

My friend has heard , that fitting a single fire ignition like dyna will improve his 78 shovel fxs , he would like to know how it works and the best system to buy ?
Thanks any help appreciated

Apr 18, 2006 | 05:36 PM

springer_

Road Captain

Joined: Sep 2005

Posts: 583

Likes: 5

From: Maine

RE: single fire ignition

Anything but the Dyna "S". The Dyna 2000i or any other system will work good. The Dyna "S" has inherant problems in the design.

Apr 24, 2006 | 12:33 AM

daryl71bus

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Joined: Apr 2006

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RE: single fire ignition

It`s a little complicated, kinda. The shovel, as most Harleys have two cylinders. one coil, and one point of spark. Now it take two sparks at different times to fire the motor. A stock (igintion) sends spark to the coil then the cylinders. But it`s sending the spark to both each time, a single fire only sends the spark to the cylinder the is on it`s compression stroke, stopping what some call the duel igintion carb-caugh. As to what kind to buy, good question & good luck!

Apr 24, 2006 | 12:38 AM

Shovelhead Bob

Outstanding HDF Member

Joined: Apr 2006

Posts: 2,537

Likes: 21

RE: single fire ignition

Concur w/ Springer......

I installed the 2000i on a 76 Shovel, easily installed, easy to manage, and gives you the flexibility of single or dual (Wasted) spark configs...

Two coils, relatively compact, and extremely powerful...

Apr 24, 2006 | 12:46 AM

daryl71bus

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RE: single fire ignition

I installed mine in 89, coils are anything but compact, I stuck a set of at the time we`re the trick-ticket Rivera duel plugs, so I`ve got two, yes I said two, dyna duel post coils. I get a bruise from the coil cover everytime I go for a put!

Apr 24, 2006 | 01:09 AM

springer_

Road Captain

Joined: Sep 2005

Posts: 583

Likes: 5

From: Maine

RE: single fire ignition

Quote:

ORIGINAL: daryl71bus

I installed mine in 89, coils are anything but compact, I stuck a set of at the time we`re the trick-ticket Rivera duel plugs, so I`ve got two, yes I said two, dyna duel post coils. I get a bruise from the coil cover everytime I go for a put!

Depending on what you are running for a coil mount and the type of bike, there is a nice conversion we used to do to resolve the problem you mention. We used to use a FXR top motor mount and run a Vulcan (Motorway Engineering) FXR dual coil bracket. It allows you to mount the dual dyna or revtech coils off the motor mount and out of the way. It looks slick works well.

If you should want more info, let me know.

Apr 24, 2006 | 01:23 AM

daryl71bus

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Joined: Apr 2006

Posts: 44

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RE: single fire ignition

Thanks for the info. I just got hit by the IRS, $27plus. I thought we were getting back. I`m in that "if it ain`t broke don`t fix it, cause I`m broke mode". Almost glad that it`s been raining so much now. When it rains, don`t ride, when I don`t ride the shovel don`t break. That`s easy!!

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May 24, 2006 | 06:03 PM

bluezguy

Intermediate

Joined: May 2006

Posts: 28

Likes: 3

From: Florida

RE: single fire ignition

Hey,
I love my DYNA S single-fire system.
Specifically, it's the DS6-2 with a pair of DC8-1 hand grenade coils.
I went through 2 SPYKE setups in 3 years and said "screw it"!!!
I duo-plugged my heads and my shovel has been 'all it can be' now for 4 flawless years. When I say 4 years, I mean 4 years... we ride all year here in Florida.
For 74 inches, I dare say I have the smoothest, most vibration-free shovel in the world

.
She's bored to .060 over with Wiseco K1611 pistons, Andrews B grind, S&S heads & Super 'E' carb, Jim's hydraulic improved angle lifters & rods and a Jim's oil pump.
I had Magnacor wires made up special for my duo-plugs. Oh yeah... the rubber mounts and 5-speed might have somethin' to do with it...