Thread: Whats the Difference here?
07-24-2008, 03:33 PM #1
Whats the Difference here?
So I'm gonna pick up some new spark plugs. I haven't decided if ill replace the ones from 2005 or just keep these on hand, but i found the ones i need.
I'm just curious, Whats the difference between these four?
07-24-2008, 05:32 PM #2
Here's what the various letters and numbers mean on our spark plugs. The factory plug is a DCPR8E.
D: 12mm thread diameter
C: Hex size 5/8"
P: Projected insulator type
R: Resistor type
8: Heat range (2=hottest, 11=coldest)
E: 19mm thread reach
The other plugs you show are the DCPR8E-IX, DCPR8EKP, and DCPR8E Solid
IX: high performance Iridium
K: dual ground electrodes
P: performance platinum
I believe the solid designation refers to a solid copper core vs hollow copper core. The solid core designs tend to make more ignition emf noise but have less internal resistance.
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