Olkutty
Member
I’ve been told to run the oem plugs, but wonder if anyone else with more knowledge has a different opinion?
Best spark plugs for a cammed 5.7?
- Thread starter Olkutty
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T Ram 20
Junior Member
I have a 2020 with detonation issues I'm going to try a 1 step colder less projected tip plugs and see if it helps any I know just about all 5.7 hemis detonates to some degree but I just want it to stop.
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So does anyone know the years they went from copper to iridium plugs? Seems NGK is the Mopar manufacturer but curious on when they switched.
Jwithing
Senior Member
I think 2015, but I could be wrong. Maybe 2013? I run iridium in my 2015.
EdGs
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Any reason to run copper plugs on 2012? Did they end up changing the suggestion to run Iridium in the earlier years after the fact?
EdGs
Senior Member
Not sure, and only guessing as to the year, read something somewhere about upgraded factory coils?
Seems like I also read about people with pre 2013 trucks using the iridium plugs without issue.
The only drawback to using copper that I see, is just having to change them more frequently. One member on this forum went 220,000 miles + on his iridiums, and they still looked great.
Sorry, I'm not totally sure about it.
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All good am just curious is all.
EdGs
Senior Member
My other Ram is an '02 1500 with the 4.7.
I know its a different gen. but when we changed the plugs. the originals almost had the electrodes completely gone, and they still fired. Unbelievable.
Wild one
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2013 is when they started to switch over to irridium plugs,by 2014 everything came with irridiums.I prefer a copper plug over an irridium plug,but the life expectancy isn't as good,but it's a more efficient plug.The coils were also upgraded when they went to irridium plugs.You can use irridiums in the earlier trucks,but to do it right,you should also upgrade to the newer coils.As far as i know if you buy an OEM coil now from the dealer,they're the newer upgraded coils
808ram1500
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I own a 2011 4.7, anyone know if the top plugs differ from the bottom or are all 16 plugs the same? I order most my parts through rockauto and they just say 16 plugs required. Only Mopar plugs state their plugs are top/bottom specific. Help...
EdGs
Senior Member
Rick, just how are the copper plugs more efficient than the iridiums?
I am not doubting you, I just don't know the why's of it.
I do know the iridium are very hardy, and after 100,000 and even 200,000 miles they still look pretty damn good with very little wear. That's pretty amazing.
When we got our '02 1500 RCSB 4.7L 160,000 miles, we pulled the copper (or nickel) plugs. The electrodes were burnt right down to the ceramic, and they still were firing with a .100 gap. Very impressive.
I am not doubting you, I just don't know the why's of it.
I do know the iridium are very hardy, and after 100,000 and even 200,000 miles they still look pretty damn good with very little wear. That's pretty amazing.
When we got our '02 1500 RCSB 4.7L 160,000 miles, we pulled the copper (or nickel) plugs. The electrodes were burnt right down to the ceramic, and they still were firing with a .100 gap. Very impressive.
It's my understanding that Copper is the most conductive material, where Iridium is slightly less conductive, but more durable. But I'm not up to ***** with the details.
As for plugs, I'd speak to the tuner and see what they recommend. They'll be able to read what the engine likes.
Wild one
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Bandit basically covered it Ed,copper is a more efficient conductor.
EdGs
Senior Member
Really surprised there's not a plug with gold conductors.......lol
Wild one
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You'd need to rob banks for a living to afford them,lol
Wild one
Senior Member
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Been almost 10 years since i was playing with a 4.7,but i remember my old 4.7 using 2 differant plugs between the upper and lower plugs.If Ma Mopar calls for 2 differant plugs,i'd stick with the OEM plugs
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