Do you gap the NKG DR8EIX Iridium?

....with stuck spark plugs. Here is a Ford factory tsb which cites anti-sieze as SOP.

NOTE: They specifically state to NOT use it on the threaded portion of the plug!

Even in this problematic application, anti-seize is not recommended for plug threads.

Just another data point to support the anti-anti-seize position statement!

Life Is Full of Surprises,
vincenzo
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Because it is such a common occurrence. If I want to know about motor oil, I ask the people who make it whose job it is to be sure I use it properly and be happy with it as well as the people who built the engine I intend to use it in. I don't ask a bunch of people on the internet with no bona fides and plenty of opinions. After all, isn't that what happened here?

Despite the information that Ferrari chose to set the plugs at .6 and NGK says to set them at .65 you chose the internet wives tale of install as received.

Am I in error?

As far as being ignorant goes if you choose to make the word a pejorative that is up to you. I am happy to admit I am ignorant on any number of issues.

 

I asked the question because iridum plugs are a different type than the ones Ferrari specified the gap for 30 years ago. No more than that.

I was interested in everyone's opinion, and yours is to stick to Ferrari's 0.6 regardless of whether these plugs are indeed different or not. Everyone respects your opinion, including me, but you call everyone else's opinion "internet wives tale" and describe my decision as choosing ignorance. Nice for everyone here.

Enough time spent on this parenthesis.

 

Need to do a mea culpa here. Went back and dug out some old NGK packaging, and what I wrongly interpreted to be a "do not adjust" symbol was/is actually a "don't use the center electrode as a fulcrum to bend the side electrode" symbol -- my bad.

 

what I have written here about gapping is only for the "normal" plaugs, so only 1 center and 1 ground eletrode.
I´m still for vacation in thailand and have not read exactly the title: DR8EIX, there you cannot adjust without damaging or even weaknesses the material

 

Christophe, keep in mind the gap has been determined by the factory according to engine compression, ignition system power, etc. If all is still factory original the gap should allways be adjusted to factory spec.

Too wide and the ignition will be too weak to jump the air gap under compression. BTW checking if a plug does have spark when out of the engine doesn't mean it will spark when in the engine under load.

 

I think we're making a mountain out of a mole hill here. Its not John Forces top fuel race car. I wouldn't gap the plug according to the engine manufacturer unless I was using a stock plug and ignition. What about the fuel chosen? What about the fuel formulation of todays fuels vs 1990 fuel and fuel from what country? Is the gap really more important than the fuel formulation? The BTU rating? No. The guy changed his plugs and the car runs fine. Its like setting my tire pressures according to the owners manual for the stock wheels when Im running a different brand, size and composition from factory.

 

Learn something new every day on this forum! No anti seize with NGK.
How about Denso?

 

I totally understand your point Paul, but with so many variables why not chose to stay with the factory spec? Well, this is my thinking.

I do the same with my tires

 

I'm obviously thinking along the same lines as Paul here, things have changed since, maybe settings should change as well? Why not give it a try? Well, I tried at 0.8 with these iridium plugs and it ran great. As an attempt to get data points, I re-gaped all of them this afternoon to 0.6, and it ran exactly the same, throughout the rev range. For what it's worth.

 

Try under hard acceleration or up a hill. Spark work hard under load not at high RPM.

 

Christophe I think you opened a can of worms not knowing there were worms in there

But some of us will learn something again.

I know of a man who index the plugs for ANY engine he built, no matter the use of it, race engines or showroom collector car for him there is only one way to build an engine. Perfection.

I told a man who allways had his engines build by him, you are in your sixties and your cars are collector cars. Do you need a titanium ultra light high cost bicycle for your sunday afternoon village ride?

 

Anybody want some popcorn?

It'll lighten the atmosphere.....

No worries... anti-seize was not used in the production of this popcorn...
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Then it will stick in the bottom.

 

Lots of olive oil!

VIRGIN olive oil!

 

Hi Claude, yes, I drove my car both time both in light and hard acceleration. The road was in hills around my house, it was going up and down. Sorry, that what I meant, I should have better described it!

 

Now you have to try it at 290kph up a hill in the rain to be 100% sure!

 

Ha!