Confused over Dyna coils and spark plugs

[Nessism]

I was told that you need a resisitor in one of the three or you can fry your coils.

Who told you that?

I'm not an electrical expert so I'll defer to those more knowledgeable than me on this one.

[trintek]

I have never fried a coil due to non-resistor wires/plugs, however on one of my newer cdi bikes, adding resistive plugs cleared up an idle issue and timing issue the bike had. probably the reason i got the bike so cheap.

I have also never heard of frying a coil from not using resistive plugs or wires, however i have seen loads of issues with tci and cdi ignition systems caused by not using them. I have not seen a blown cdi or tci from not using them though, not to say it couldn't happen.

bottom line is, if resistive cables are called for, use them or resistive plugs. if you have non-resistive cables, grab resistive plugs, they're cheap and provide the same performance... whatever you do, don't use resistive wires and resistive plugs at the same time.

all the resistors do in this application is kill (or reduce) emi in onboard systems. cdi, tci, cell phone, two way radios, am radio, (even some gps units) etc... if you are running mechanical (point ignition), you won't harm anything, if you are running tci or cdi, you may experience some timing issues, if you have converted to fuel injection, or a microsquirt (or comparable) system, you may experience any number of issues.

[rustybronco]

If a system (gps, radio, ect..) is properly designed and takes into account EMI interference, you don't have issues with corrosion in your connections; you shouldn't have issues. the problem with most electronic items today is cost. designing in overkill has a price.

resistor wires and plugs go a long way towards reducing EMI.

where's Jim when you need Him.

[trintek]

If a system (gps, radio, ect..) is properly designed and takes into account EMI interference, you don't have issues with corrosion in your connections; you shouldn't have issues. the problem with most electronic items today is cost. designing in overkill has a price.

resistor wires and plugs go a long way towards reducing EMI.

where's Jim when you need Him.

very true. i would also say size is a limiting factor, i have a garmin gps that works great inside of any of my vehicles, and i have a little usb dongle that needs to be 3 feet or so from my netbook and engine (finally just velcroed it to the ceiling)... major diff between the two, the garmin has an older engine and loads of shielding, the dongle is completely unshielded.

i can't say either way if going resistorless will have any detrimental effect. my vw's always run non-resistive with bosch blue coils, but the 2-meter radio i use in them has a shielded base and has the option to run on a battery pack, so never noticed an issue. from experience, the only problems i have ever noticed are timing/idle related when dealing with electronic ignitions.

[rustybronco]

As you know, 2 Meter radios are FM. the signal produced by the ignition system is AM. so unless a properly designed front end is over loaded on your radios, you shouldn't have an issue.

de kb8hsd

[trintek]

true, most noise i had was while using the cigarette adapter and rubber duck antenna. the sent audio was fine regardless of being plugged in or not, and received audio was fine when using the battery pack. as this was on a vw and a jeep cherokee that were both running modified ignition systems, i suspect it was just the usual electrical interference speaker noise (high to higher pitch whining depending on rpm). of course the old hotwater 202's were great for modding, but imo were lacking in other areas.

the antenna i used on the vehicles were a pvc encapsulated copper tube slim jim and same materials 1/4 wave j-pole.

btw, nice to see another radio op

if you are ever in the terlingua/big bend area, hit the repeaters. kb5rob always has his on as does n1vzl, mine is kb5kou (for some reason still not showing as tech class, need to call them and sort that out).

[Steve]

I was really looking for nice yellow Accel 8mm copper core wires, but nobody around here carries them or had even seen them for years.

I have some yellow Accel graphite core suppressor wires that I took off one of the bikes I got.

You want them? You can have them.

They are complete with the right-angle boots for the coils and straight boots for the plugs.

.

[Turtleface]

Z1 also has some Dyna yellow suppression 7 m.m.s. Ordered a set with my new coils and plugs yesterday. Hopefully they'll get here about the same time as my stator, R/R, fork rebuild, POR-15. Next weekend's looking full.

Here's a link to the Z1 wires, they're gawdawful hard to find one their site. http://www.z1enterprises.com/detail.aspx?ID=207