Need info on NGK LFR6A-11 for evo 9...
Jul 18, 2008, 02:22 PM
#6
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This what NGK told me. "The LFR6A-11 is indeed one heat range hotter and will NOT burn colder
than the stock ILFR7H. The other problem is that the set gap of the
LFR6A-11 is at .044" (1.1mm) which is too large for this application and
will not fire correctly if gapped down to .030", as the gap should not
be changed more than .008" from where it is factory set.
To go colder we currently only offer iridium race plugs which are part
numbers R7437-8 (projected tip, street use) or the non-projected, fine
wire, low angle ground electrode version R7438-8 (race use only or high
boost, may foul on street) Hope this helps clear things up. Thank you.
Best regards,
Brandon Peeler
Technical Support Representative
than the stock ILFR7H. The other problem is that the set gap of the
LFR6A-11 is at .044" (1.1mm) which is too large for this application and
will not fire correctly if gapped down to .030", as the gap should not
be changed more than .008" from where it is factory set.
To go colder we currently only offer iridium race plugs which are part
numbers R7437-8 (projected tip, street use) or the non-projected, fine
wire, low angle ground electrode version R7438-8 (race use only or high
boost, may foul on street) Hope this helps clear things up. Thank you.
Best regards,
Brandon Peeler
Technical Support Representative
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Sep 11, 2009, 05:35 PM
#13
as far as gapping more than .008 there might be an issue with some plugs but I gapped mine to .022 and it works just fine 
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