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01-30-2012, 01:00 AM
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#2 (permalink) |
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Member
 
Join Date: May 2011
Location: Port Moresby, Papua New Guinea, the land of the 'Unexpected'
Posts: 78
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Iridium plugs were manufactured in an effort to increase combustion efficiency & as a result milage & in some instances HP, they acheive this by having a laser weld the Iridium electrode to the spark plug, because the tip is much thiner than the standard Copper/platinum electrode the arc (Between electrode and ground) is more concentrated, another benifit of the Iridium is that as engine temps increase so do the resistance values of the electrode, if you had 11000 volts being produced at say 250 degrees and the temp raised up to 300 degrees your resistance through the conductor would increase and you would see a decrease in the voltage at the electrode, decrease in voltage means smaller spark, less combustion efficiency. The Iridium plugs can operate at much higher temps before this resistance changes, so you do not see the decrease in voltage and subsequent spark from the electrode.
Hope this makes some sense.
__________________
2011 YFZ450R SE, Dasa full system, FCI, PC5 ignition/fuel & auto tune, GYTR nurfs, Kibblewhite springs/seals, Stage 3 HotCams, Venom Portwork Hiper Tech 3 rims, Razr 2 F&R, Pro armor full skid, Pro armor swing skid, AC racing front bumper CW 98mm BB, Flexx bars, PP stabilizer, +1 ArsFX steering stem, Arsfx anti vibe mounts, Streamline extended SS brake lines, PowerMadd guards, E sticky graphics, Houser A arms & lowered grab bar, Fox LT floats & Podium rear. 
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