Iridium Spark Plugs

[mcgovern61]

I am having an issue with interference with my new radio setup. In the process of troubleshooting, I discovered some dumb things I did (as far as the radio circuits are concerned). I installed non-resistor spark plugs in my '83 transplant engine a few years ago and also new 8mm solid core copper wires. The ignition system works like a clock, but my new radio setup is picking up big time ignition noise that winds up as the engine speeds up. (My mistake)

The plugs are due to be changed anyway and I have some friends that talk up Iridium plugs as the next best thing they ever did on their bikes! Me, I'm prone to stick with OEM recommended stuff for the simplicity of consistency. I have heard that there is stronger pull on hills and uses less gas.

Any experience out there with stock 1100 ignition using these plugs?

 

[joedrum]

yes they seem to be very good ... the 1100 dreser or the angry dresser had them .....i could tell the difference some ...id just buy some regualar resistor plugs and try um to see if it helps stop the noise

 

[slabghost]

I've tried fancy plugs of different varieties over the years in older motors. I was never really satisfied with them. As long as they don't say Champion on them I buy the cheapest plugs available.

 

[zman]

Did NGK ever get better?..We had a nickname for them "No Good Kind" for the insulators ability to crack..Always used Nippondenso plugs back then but I really havent checked as of late.

 

[dan filipi]

One of the engines I ran had a broken oil ring and smoked a lot.
The irridiums would fire good when the standard type ngk would foul.
I think the irridium plugs are good but not sure they are worth the $10 each they cost me and I really don't think they improve mpg or power. I never noticed any difference.
2 of them have since shorted internally somewhere and I'm running regular ngk now.

 

[backlander]

I know this ain't about plugs, but would a in-line rf filter in your hot wire take care of the problem. Haven't tried one in years but we use to put them in the old muscle cars of the fifties and sixties.

 

[Ansimp]

I love irridium plugs. But I won't waste my money on the GWs as it is too easy to change the plugs as they are so accessible. You get 5 sets of standard plugs for 1 set of irridiums. That said all the petrol Foresters and the CBRs get irridiums :yes: :good:

 

[mcgovern61]

backlander » Thu Apr 24, 2014 3:26 pm[/url]":3bu6fozs]
I know this ain't about plugs, but would a in-line rf filter in your hot wire take care of the problem. Haven't tried one in years but we use to put them in the old muscle cars of the fifties and sixties.

Mike, I have one in there already and it did not help. :thanks:

 

[mcgovern61]

Good advice all. Yep the IR plugs are expensive. I went and purchased some good old fashioned NGK RESISTOR plus for $2 ea. :thanks:

 

[C5Performance]

This is an old thread but I have a bit of feedback in case someone stumbles onto this.

Iridium is a tougher material which has less material transfer during the ionizing that occurs during a spark.
It does not filter noise, it only lasts longer on high mileage vehicles or on multiple spark ignitions (MSD, Ford, C5, and others).

If you have resistor caps and plugs, I HIGHLY suggest using the Moroso brand 800 ohm per foot "Blue Max" plug leads. It is the only wire endorsed by Power Arc and offers the best EMI protection you can buy (except MagnaCore which are really expensive).

I hope this helps!