Thread: Spark plugs
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Old 07-03-2013, 03:25 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

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Laser Platinum PLZFR5B13EG * ( these will melt the Coil Pack )
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Last edited by GTyankee; 07-03-2013 at 03:29 PM.
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