Ron Burgandy

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Have any of you had issues with the Iridium plugs with the CPR setup? I used the BKR9's before and they seemed to work fine with the S300v2 but when I added the CPR it didn't like the 9 plug anymore. I tested multiple sets of iridium plugs and they all did the same thing......then I would throw in some 7's and it would run fine.......not a big deal but I do like the longevity of the iridium plug over having to take 3 sets of plugs to the track.

Thanks ahead for the info.

HeikDiesel

I've always just used the coppers. 4644 for heat range of 7. Not sure what a heat range 9 would be. That seems like a pretty cold plug. And when you say "issue" what issue are you having exactly?

JRCivic1

NGK doesn't offer a resistor type copper plug that is colder than the "7" heat range... so you have to go to Iridium in the NGK line if you need the colder heat ranges of "8" or "9". I am not sure why the OP would be having problems with Iridium plugs and the COP conversion... I would look at all grounds in the COP system.

SPOOLINmatt

wrong there buddy.

I've been using non iridium NGK 9's since birth in my car. I hate the tiny tips on those iridiums and i have never had a problem with uberdata, Chrome, hondata(for 14+ years) with a distributor and now with AEM and COP.

JRCivic1

Matt, I am unaware of the product that you describe, but would love to use some to keep costs down. Please share the NGK part number so that myself and others can source these.

SPOOLINmatt

https://www.summitracing.com/parts/ngk-5238

JRCivic1

I am familiar with that plug matt... it is a NON-RESISTOR type plug. In my post above, I stated that I was unaware of a RESISTOR type plug with a heat range colder than 7. The Honda/Acura ignition system is designed for resistor type spark plugs. Many use non-resistor type plugs on Hondas and about half seem to have success with them. Unfortunately, many have the normal problems associated with the use of non-resistor type spark plugs... tach jumping, electrical system short/reset, rapid coil and ICM failure, etc. So, these plugs may work for your drag race car, but that doesn't mean that they will work for everyone that reads this post... in fact, they will work about 50/50 for street cars or road race cars.

So, do you have a part number for a resistor type plug with a heat range colder than a 7 from NGK ???

SPOOLINmatt

No missed that part. I've tuned several other race cars and street cars and had street cars of my own in the past, etc. Never had an issue even back when using the non resistor #7's. I think most peoples problems start with WIRING. I've heard the resistor myth for a long time. Some people swear by it, but it's never been an issue for anyone I've ever known. I know some people that can turn wiring into a **** fest really fast.

Ron Burgandy

iTrader: (1)

thanks Matt. Was looking for this plug. I've had good luck with them.

SPOOLINmatt

Stay Classy

Ron Burgandy

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