Dyna-S electronic ignition Question

[gwhunran]

I just put a new Dyna S ignition on my 79 GS1000L. I have new coils and wires on order but have not received them yet. A guy at my favorite bike repair shop told me "don't run the bike until you put the new coils on." Supposedly because the new coils are a lower resistance than the factory coils, 3ohms versus 5ohms. He said that running it before the new coils could damage the new ignition.
This doesn't make since to me because, if the current coils have a higher resistence they should put less load on the ignition than the new lower resistence coils will. I am more familiar with audio applications dealing with speakers and amplifiers where higher impedences between speakers and amps cause the amp to run cooler or less hard than lower impedence speakers. Too low an impedence can cause some amps to burn up.
Is my logic right? Is it safe to continue to run the bike until I get the new coils?

Thanks,


Richard

[scotty]

why chabce doing damage---

[renobruce]

Check the resistance on your current coils. I think you will find them about the same as the coils your buying. I ran the GS1000 with stock coils and the dyna s with no problems. You don't have to replace both the coils and the ignition.

[RacingJake]

Nope it won't hurt a thing. The Dyna S is make to run with factory coils or aftermarket. With the lower ohm's you get a better spark. I got 2.2 coils that are going on next week and the past year and a half I've been running 5 ohm on one side and 7 ohm on the other with no problems.

[KEITH KRAUSE]

You can always call Dyna out here in California if you have ANY doubt.

[Planecrazy]

That's the best idea ... I concur. If I'm not mistaken though, the Dyna S is designed to work with both 5's and 3's (stock on my 80 GS550L is a three anyway), so there was no difference between running the stockers before putting on the Accel performance coils and wires...

Enjoy!
Steve 8)

[gwhunran]

I called Dyntek and they are closed until Monday. I emailed them about the safety of running the bike until I replace the coils, so I will just wait and see what they say. In addition to the new coils and wires, I am waiting on K&N pods to replace the Emgo(sp)pods. I already have a Dyno stage III jet kit to install, and new o-rings from B. Barr to put into the carbs. Plus I will be trying out the new Morgan Carbtune to set up the carbs. I love the tinkering, I just hope it all comes together in the end. This bike amazes me already with top end power it has now.
Many thanks to all who have already responded to my questions.

Richard

[Boondocks]

gwhunran,

Your electrical analysis is correct. The 3 ohm coils will run hotter than the 5 ohm coils due to the lower resistance. 3 ohm coils are a high performance option, but are not required for the street.

The FAQ's on the Dyna site are pretty sparse except for the Harley section (I guess Harley riders need more help).

If you check out Why does Dynatek recommend 5 ohm coils for street use and 3 ohm coils for racing?
in the Harley FAQ's you will see that either impedance will work.

[jeff.saunders]

no problem in your situation - as long as the coils are equivilent or higher resistance, the coils and ignition are just fine.

Now you don't want to be running coils that are lower resistance than the ignition setup - this will cause the coils to overheat.

[gwhunran]

Heard from Dyna tech support today

Got an email from Larry at Dyna today confirming what many have said. No Problem running Dyna Elec. Ignition with stock coils. He also said that I would not realize the full potential of the new ignition until I upgrade/replace the stock coils and wires.

Thanks again for all the responses.

Richard