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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #31  
Old 06-23-2013, 10:12 AM
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snrusnak snrusnak is offline
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I got the oem plugs for my truck and didn't have to get them at the dealer. It is true you should stick with oem.

For those that see this before they change their upper bank plugs, after you rip the boot off, take a piece of copper pipe (can't remember if it's 3/8" or 1/2") and jamb it between the plug and the ripped boot. It will separate them then removal is easy. This works great. Only bad thing is you have to rip the boot off first lol.

Definitely don't use E3 plugs on this engine. There are a couple other plug candidates but they are no cheaper or better so you should stick with oem. Only exception would be you can run the lower bank iridiums in the upper bank.
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Last edited by snrusnak; 06-23-2013 at 10:14 AM.
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  #32  
Old 06-23-2013, 06:14 PM
barnall barnall is offline
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regarding the plug boot on the coil, it probably will get tore up if it sticks to the plug, which is likely. Most all the posts on here and other forums say they are not available as a separate item. I just ordered 8 new coil boots from NAPA for 11.99 each, they said they will arrive tomorrow. Part # BEL702517. If they dont come in I will repost to let everyone know.
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  #33  
Old 06-23-2013, 06:16 PM
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snrusnak snrusnak is offline
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Thanks for that info Barnall! I'm writing it down for next time just in case!
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  #34  
Old 07-01-2013, 06:52 PM
EWC88 EWC88 is offline
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So OEM are the best plugs to get? I need to do my plugs bad, at 98k and I never replaced them since I got truck 60k and have no idea if old owner did them.
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  #35  
Old 07-01-2013, 07:56 PM
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Absolutely, go with oem plugs.
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  #36  
Old 07-03-2013, 12:22 PM
EWC88 EWC88 is offline
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Just curious what makes the OEM the best and not these other brands other people are saying? Seems like there having amazing outcomes compared to the OEM.

I'm a noob to plugs so just wondering, could be wrong with whatever I say.
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  #37  
Old 07-03-2013, 01:00 PM
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It's not that all other plugs are bad, it's just that most are. Most of the known ones are just marketed well, and usually perform worse. There are some plugs out there that will be good choices, but typically they will be AS GOOD as oem, not better.

Any plugs you were considering? I'll let you know advantages/disadvantages of them as compared to oem...
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  #38  
Old 07-03-2013, 02:25 PM
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spark plugs are NOT universal any more

when a engine designer builds the engine, they need a spark that burns off a certain volume of combustible air & fuel that is under extreme pressure

so they make specs for a spark plug that should do the job
they send the spec sheet off to spark plug manufacturers
they attempt to make the spark plug do everything required by the engine designers & those plugs are then tested for hours in running engines that are put through rigorous testing
Some plugs pass the test, some don't, some wear down quicker under testing, some still look almost new, with no rounded edges on the electrodes

i have not used Champion spark plugs for longer than i can remember
but i discovered that the spark plugs that are marked Harley Davidson are in fact, a specially order specked spark plug that is made by Champion. If you try another universal spark plug in a H-D engine, you will notice less performance & a shorter spark plug life

The 5.7L HEMI likes ( check your Owners Manual for the CORRECT GAP )
Champion number is REC14MCC4
( this may be the same plug, from Rock Auto )
CHAMPION Part # 446 Copper Plus
.044 Gap; OE Type; Engine Code EZD

Oriellys auto parts
Champion® Copper Plus - Spark Plug
Part Number: 446

• UPC: 37551012244

__________________________________________________ _______________
NGK LZFR5C-11
Standard LZFR5C-11 #
( may be the same plug from Rock Auto )
NGK Part # 92174 Standard
.044; OEM/OES Spark Plug; Engine Code EZD

( Oriellys auto parts )
NGK Copper Core - Spark Plug
Part Number: 92174
Line: NGK
1 year limited warranty
• UPC: 87295921746
• Plug Number: LZFR5C-11

---
Laser Platinum PLZFR5B13EG * ( these will melt the Coil Pack )
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Last edited by GTyankee; 07-03-2013 at 02:29 PM.
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  #39  
Old 07-23-2013, 11:38 PM
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I switch plugs every 100k but when you do make sure to put dielectric grease on the connections. Also I wouldn't put anything (I.E. seafoam) in your gas tank unless it is an dealership additive that's made specially for that fuel injection system.
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