Reading Iridium Spark Plugs

[808Matt]

Just switched from a TR6 spark plug, to a TR7IX reason being I didn't like how the heat on the strap was close to the weld on the TR6 so I decided to go one step colder and try an Iridium plug. I've never ran iridium plugs before so looking to see if anyone can provide advice on how these look. In fourth gear at 6,500 wide band shows 11.2, what do you guys think. Thank you

 

[03cobra#694]

Go back, had those on mine. I'll stick with TR-6. They got stupid for no reason. Car was breaking up like a bitch with only 8K on the plugs.

 

[Coosawjack]

Iridium will last a long time but it's a poor conductor of electricity relative to copper....take a look at this chart.....decide for yourself!!

 

[808Matt]

Iridium will last a long time but it's a poor conductor of electricity relative to copper....take a look at this chart.....decide for yourself!!View attachment 1531018

I decided to switch back to a copper plug and but one step colder then the TR6 and am running the BR7EF. Car definitely feels smoother during WOT and not like it's fighting itself. Some people may have good luck with the NGK iridium series plugs but my car definitely did not like it. I will be staying away from iridium plugs for now.

 

[GodStang]

I was about to say go back to cooper. Many people are breaking the iridium plugs and I have always had better running with cooper plugs.

 

[98 svt]

Copper for the win.
Iridium/platinum/etc is for low maintenance/longevity.

 

[Shadow Grey 03]

TR-6 and the BR7EF seem to be the way to go for us. I've never had issues with the TR-6s and have plenty of different setups to see how they hold up. No complaints here.