Is gap same for NGK PFR6G-11 and NGK PFR7G-11 Spark plugs 4 USDM B18c & JDM B18c ITR?

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Oct 21, 2013 | 02:20 AM

NinjaJDMB18c

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Is gap same for NGK PFR6G-11 and NGK PFR7G-11 Spark plugs 4 USDM B18c & JDM B18c ITR?

Hello,

According to ngksparkplugs.com the Gap for the NGK PFR6G-11 spark plugs is 0.044" for the 1998 USDM B18c ITR. I have a 1998 JDM B18c ITR motor. If I used the NGK PFR7G-11 spark plugs would I also gap them to 0.044"? The difference betwern the USDM B18c and JDM is USDM is 10:1:0 compression and JDM is 11:1:0 compression. Thank you in advance for any posts!

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Oct 21, 2013 | 08:18 AM

CHEETAH

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Re: Is gap same for NGK PFR6G-11 and NGK PFR7G-11 Spark plugs 4 USDM B18c & JDM B18c

the "-11" in the spark plug part number means 1.1mm which is equivalent to the 0.4 gap, so no need to gap the plugs, use them how they are. 10:1 vs. 11:1 compression will not require a change in gap, or at least a very immaterial change anyway.