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Thread: Gap of the Iridium spark plug?

  1. #1
    Inactive Member Mr Rogers's Avatar
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    Well I am running a gap of .043 on my Iridiums and have had not a single problem. I was running some Hi-po Platinums at the same gap b4 the Iridium's so I know that the Iridiums could go further but why? Good luck

    ------------------
    98 GS-scR w/ 8psi JRSC, Walbro HO fuel pump, AEM cai, DC 4-2-1 one peice header, Thermal Exhaust, Skunk Works cam gears, J&S safeguard, RC 310's, Cartech FMU, Vortech regulator, H&R sports and KYB AGX's, and of course to slow down, KVR X-drill F&R rotors and Carbon Kevlar pads and V1 to signal the slowing down and soon to go on the "Juice" and a CF diet.
    Best et ==>13.6 @ 103mph w/ 2.3 60ft

  2. #2
    1fstGSR
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    I am running .049 right now with no problems. I have a MSD SCI box with a Blaster SS coil and MSD wires. This is with 9 psi of boost on a built motor though.

  3. #3
    Inactive Member GSRKOH's Avatar
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    Question

    I have a plan to install JRSC kit on my 2000 GSR. I got Denso Iridium IK22 that is gapped 8mm from factory. I heard that JR recommend 9mm (0.035~0.038") for the gap. I think that I have to adjust the iridium plug differently because it has thinner tip that requires less voltage to make spark. Should I apply the same gap as other conventional plugs? Or, please let me know the gap for iridium plug that I plan to use with JRSC.

    Cheol
    Hamden, CT

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