NGK Iridium Spark Plugs

Phrog · 04-17-2003, 07:33 PM

Anyone have experience or thoughts about using the NGK Iridium plugs in an 84 Carrera.

911pcars · 04-17-2003, 07:54 PM

No experience, just thoughts. They would be an expensive substitute. Are you looking for more power? If so, I don't think you'll won't find any in this area.

Sherwood Lee
http://members.rennlist.org/911pcars

Rot 911 · 04-18-2003, 05:55 AM

Waste of good money. You will get no more power than with the standard NGK plugs.

movin · 04-18-2003, 10:04 AM

Using them right now in my '87. I was using Bosch Platinum+. Actually feel the Bosch was marginally a better performer and a lot less expensive. Most fell NGK or Bosch Copper core are the best performers. That's my next switch, NGK BP6ES.

Paul Thomas · 04-18-2003, 11:22 AM

I use the NGK BP6EY. The guy at NGK tech support told me to give them a try. They have a split electrode, they weren't any more expensive, so what the hell.

Paul

island911 · 04-18-2003, 11:29 AM

Platinum .. .Iridium . .. I'm holding out for the plugs made from unobtainium.

Superman · 04-18-2003, 11:32 AM

Anything but kryptonite. I use copper plugs. I like NGK and Bosch. Trusted mechanics invariably recommend the simple copper plug. Besides, copper plugs contain no kryptonite. Can't be sure about the other ones.

jester911 · jester911's Garage

I know some people seem to be ok with split electrode plugs but I put some in my car last year and after about a week they started causing the car to miss so bad I couldn't drive it. They were bosch platinum. And yes they were the ones prescribed for my car.

After doing some research and asking around evidently there have been cases of people burning a head with these plugs.
Just a word to the wise.

These cars were engineered with certain things in mind and I think when you deviate from those at the least you are wasting money and the worst doing permanent damage.

I went with the standard bosch at .99 each and the car ran great and still does.

Phrog · 04-18-2003, 12:52 PM

Thanks everyone for your input, I'll stay with the old tried and true copper plugs.
Kevin

Rouxzy · 04-18-2003, 04:34 PM

A gear head friend of mine explained the deal with platinuma and iridium plugs. Platinum takes less voltage to create a spark compared to copper and iridium takes less voltage than platinum. Is this enough to make a difference or just enough to burn cleaner. For those of you who need to pass emissions tests, (sucks to be you) it might be something to think about and investigate.
Tom

ChrisBennet · ChrisBennet's Garage

I've heard from a shop owner friend of mine that the trouble with the Bosch Platinum's is that the sintered platinum electrode falls out. This is the $2 Bosch platinums, not the $20 one that some older 911's use.
-Chris

orph · 07-31-2003, 02:31 PM

Called one of the better known tuners in the Midwest and ordered several tune-up items from him. Received the package today and noticed the plugs sent are the NGK's Iridium.

For an '86 turbo, anyone know what gap these should be set to ? I'm thinking .028.

john walker's workshop · 07-31-2003, 02:56 PM

i use them in my harley. it fouled bosch platinums eventually, but not these, yet.

orph · 07-31-2003, 05:57 PM

Thanks for your reply ! Got 4 of 'em in tonight. Started assembling new Magnacore Plug wires into a new distributor cap-geez they seem to be a real bear to get the leads down into the respective slots and seated firmly !

mm86911 · mm86911's Garage

Running Platinums in my 3.2, check them ocassionally and never had a problem.

David · David's Garage

I run them in my road racing shifter kart. They've either added power or changed my luck, but I couldn't see putting them in a street car, unless you just really needed to spend some money.

1fastredsc · 07-31-2003, 08:38 PM

I believe the only advantage to platinum is that past a certain temperature it becomes a self cleaning metal. Hence the reason why the claim to go 100k miles without changing. But copper conducts electricity much better than platinum (or at least that what i remember from chemistry). Iridium i have no clue of, but then again if you want the best conducting metal, just have someone make gold plugs for you. Or go second best with silver. I like copper better myself and a tuner in san diego told me the same thing i've stated above.

BennyBroadcast · 08-01-2003, 04:17 AM

I tin' de gol an silvr wil melt maaan.................

lendaddy · 08-01-2003, 04:46 AM

"if you want the best conducting metal, just have someone make gold plugs for you"

Actually this is not correct. Many people believe this because all kinds of high end electronics come with "Gold Plated Terminals". They do not do this because gold is such a great conductor of electricity, rather it is a good conductor that has great anti corrosion properties. Unless I am mistaken silver is one of the best conductors along with lead?(not sure on that one).

KTL · 08-01-2003, 06:22 AM

Aren't the precious metal plugs more durable than the usual copper core plugs.

Meaning, they last longer than the coppers?

Other than the longevity issue, I think it's been mentioned around here a number of times that the high dollar plugs don't provide any significant advantage?

The spark plug issue is alot like the oil preference- buy whatever makes you happy?