#1 spark plug pulled @ 54,0000 added Counterfeit NGK plugs?

MyStang

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Any input on reading plugs? Stock plugs @ 54,0000 (CYFS12Y) Gap still @ .052 using feeler gauges.
Motorcraft or NGK?
18 manifold, GT 350 cold air/throttle body, Hp tuners.
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MyStang

MyStang

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On the way
NGK iridium ix spark plug ltr6ix-11
What would be the best gap for the plugs, thinking .050.
 

Cory S

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NGK iridium ix spark plug ltr6ix-11
What would be the best gap for the plugs, thinking .050.
.048-.050" yep.
 


jacknifetoaswan

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.048-.050" yep.
Just replaced mine last weekend with the NGKs at .050". She runs perfectly.

Well, other than the giant cloud of oil smoke on first start because my #8 plug well tube is leaking oil, but...

JR
 
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MyStang

MyStang

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Darn internet has me double guessing my purchase!
Any one with a picture of a genuine NGK iridium ltr6ix-11 spark plug?
I may have received a counterfeit set.
Taper shoulder has NGK I I I I I I I LTR6IX I I I I
HEX has U1Z8 stamped on them.
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Zrussian13

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These are 6510s but should give you something to compare too. Don't mind the orange tips. I run a shit ton of octane booster.
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MyStang

MyStang

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Zrussian13,
Thanks feel better now!
 

 
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