Rate my Plugs

[zoomin0074]

Just changed my plugs in my 06 4.7 to NGK Iridium, its been about 30,000 miles since I put this last set of champion copper plugs in. Current mileage is 146,000

I would like to get some opinions on how the the champions look after 30,000 miles. So far the NGK Iridium ones seem to have smoothed out my idle and provide better throttle response.

 

[usaf2006]

Look pretty rough for 30k imo... it's there anything left?

 

[Hemi5speed]

Looks normal to me. I don't see much electrode left on the old plugs but 30k is about when I change copper plugs so you were probably due

 

[ST-8]

Those look beat compared to the oem champions i replaced an they had 79,835 miles on them

 

[emjohn4]

They look pretty worn to me - but without any other good 30k comparisons - it's hard to tell if they are excessively worn.

 

[xb1230]

The plugs you had were beaten badly. How is your driving? What are your driving conditions (Lots of hill climbing, towing heavy loads, Warm/cold climate, etc.)

Electrode erosion is often the result of too high lead content in the fuel used. It can also come from corrosion, which often comes from very short commute where the engine does not have the time to warm up enough and then condensation occurs in the chamber causing corrosion which when the engine is started again, leads to erosion of the electrode. In some cases, engine overheating can cause a breakdown of the electrodes, so if you are making your engine work very hard in towing conditions, or carry very heavy loads in the bed while having to deal with a lot of hill climbing that can also lead to this kind of results.

Also, you already got the IRIDIUMs in, but I would recommend you to go back to simple copper core Champions 439 (or equivalent NGK).
You may feel the IRIDIUMs to make your engine less responsive as the IRIDIUM core put a lot of strain on the Coils which were not designed for them and they have a hard time firing them properly. The other negative side effect is that while putting more strain on the coils, it can wear them out faster. Also since the plugs are not firing enough you are exacerbating the carbon build up issues these engine are known for.

I have gotten much better results in regards to both performance and MPG with the standard copper core CHAMPIONs, and even though they have to be changed a little more often it is not a job you do every month so it's not too bad considering the benefits.

If you engine has a tendency to run "HOT", getting plugs that run a little hotter can help. NGK actually recommends a plug that is 1 step hotter than the direct replacement of the CHAMPION 439. I rougher driving conditions they help, and last a little longer.

Just thought I would let you know. just in case you feel your engine is not running better even with new plugs.

Hope this helps.

 

[NYCruiser]

Do use any fuel additives that may add lead?


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[zoomin0074]

Currently I run a SuperChips 87 tune with slight custom trans tuning and volant CAI. After changing to the new iridium plugs my rough idle seems to have been smoothed out and I get better throttle response. With this truck being a QC and a 4.7 I do need to get into the gas more to make it move the way I want, guess I have a lead foot. I was not aware that the iridium plugs could cause my coils to fail.

The plugs you had were beaten badly. How is your driving? What are your driving conditions (Lots of hill climbing, towing heavy loads, Warm/cold climate, etc.)

Electrode erosion is often the result of too high lead content in the fuel used. It can also come from corrosion, which often comes from very short commute where the engine does not have the time to warm up enough and then condensation occurs in the chamber causing corrosion which when the engine is started again, leads to erosion of the electrode. In some cases, engine overheating can cause a breakdown of the electrodes, so if you are making your engine work very hard in towing conditions, or carry very heavy loads in the bed while having to deal with a lot of hill climbing that can also lead to this kind of results.

Also, you already got the IRIDIUMs in, but I would recommend you to go back to simple copper core Champions 439 (or equivalent NGK).
You may feel the IRIDIUMs to make your engine less responsive as the IRIDIUM core put a lot of strain on the Coils which were not designed for them and they have a hard time firing them properly. The other negative side effect is that while putting more strain on the coils, it can wear them out faster. Also since the plugs are not firing enough you are exacerbating the carbon build up issues these engine are known for.

I have gotten much better results in regards to both performance and MPG with the standard copper core CHAMPIONs, and even though they have to be changed a little more often it is not a job you do every month so it's not too bad considering the benefits.

If you engine has a tendency to run "HOT", getting plugs that run a little hotter can help. NGK actually recommends a plug that is 1 step hotter than the direct replacement of the CHAMPION 439. I rougher driving conditions they help, and last a little longer.

Just thought I would let you know. just in case you feel your engine is not running better even with new plugs.

Hope this helps.

 

[Harley Harrold]

I changed my plugs shortly after purchasing my truck when it reached 60K, the original plugs were never replaced. The old plugs showed about half of what I see with your plugs. From all my research, on proper long life plugs for the HEMI engine, Champion Copper Plus are the best. By the way in normal operation the spark gap will increase about a thousandth of an inch per 10K miles.