how to close gap on ngk iridiums
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This is a discussion on how to close gap on ngk iridiums within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I'm planning to buy some 1 step colder ngk iridiums and I found out that the gap is somewhere around ...

  1. #1
    Registered User prspect06's Avatar
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    how to close gap on ngk iridiums

    I'm planning to buy some 1 step colder ngk iridiums and I found out that the gap is somewhere around .40. I read that the optimal gap should be between .28 and .30 so I need some closing up to do. I also read that the iridium tip is very fragile. So how should I go about closing the gap on the plugs?

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  3. #2
    Registered User prspect06's Avatar
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    bump...need some advice please

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    i wouldn't buy the iridium, i think the copper works the best.

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    Registered User prspect06's Avatar
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    well...i already purchased iridiums and i need help with those.

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    Registered User cyrilgrey's Avatar
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    I have these plugs. The tip itself is fragile, so don't hit it. The strap, however, is the same metal as always.. so I pushed it against a concrete wall until it bent to about where i wanted it, checked the gap, readjusted with wall if necessary, and installed.

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    You really don't want to narrow the gap. A wider gap will burn the fuel more efficiently. I can't remember the exact science at this moment, but the wider the gap the better as long as your coils can fire it. I always ran a .50-.55 gap in my cars but I always upgraded to a Accel Supercoil. I don't know much about the coils on a WRX, though, so I might just be blowing smoke where they are concerned.

  8. #7
    Registered User cyrilgrey's Avatar
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    I would stick with the manufacturers recommendation.

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