I was going through a Motor Trend magazine yesterday. And there was a spark plug advertisement for Bosch Iridium Fusion plugs. Got me thinking.

What kind of plugs are even in our GXP's to start with? Anyone bothered upgrading them? If so, to what?

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Looking for spark plugs upgrade too

From what I understand our engines are very particular to the type of spark plug used. Most people have not changed the plugs. I had to put in the newer OEM plugs that were hotter bc of the cold start issue, and then regap them to .030" for more compatibility to the tune I am running.

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they're AC delco iridiums

There have been a lot of issues with plugs on this motor. I don't recommend a swap.

That's what I was saying

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On the subject of Spark Plug Gap. New TSB revision out today on new plugs for GM V8s, has caught my eye. It appears to contain information about Iridium Spark Plugs that looks general in nature. Wonder if it would apply to the Solstice Iridium Spark Plugs.

Here is parts of the TSB.




Just wanted to toss it out.

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So if you want to change your plugs get a V-8, seems simple enough.

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Actually I think the point was don't play with the gap on the Iridium Spark Plug ... but I could be wrong

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Ya know this is weird too, Ive never met a iridium plug that didnt cause KR compared to good ol fashion copper 'trode and platinum free strap.