GT350 spark plug gap spec revised for 2019?

[galaxy]

I also had an ever so slight hiccup that went away with new plugs.

Which plugs was that?

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[WItoTX]

Which plugs was that?

The plugs out of spec was cylinder 8 (passenger rear). I could be wrong on that cylinder number, but it was passenger rear.

It was the factory plug as best I can tell.

 

[galaxy]

@WItoTX No, I was asking what plugs did you use to fix the stumble you had.

 

[WItoTX]

@WItoTX No, I was asking what plugs did you use to fix the stumble you had.

Ahh gotcha. I replaced them with the stock motorcraft plugs (SP548). After doing more research, I will probably go the route HB did and go one level colder when I swap them next year. I still have a stock tune, so at least there is one less variable in there to play with.

On second look, the old plugs were iridium's, so They've definitely been swapped at least once, and had I known that before I pulled them, I probably would have gone with the iridium's (SP90) again.

I have a track day this weekend, so if any anomalies come up, I will keep you updated.

 

[galaxy]

LTR7IX-11...$5.94 ea at RockAuto right now.

 

[fpa1974]

Did not see this plug mentioned here, NGK US recommends - for a 2019 - ILTR7N10 (NGK 95856) it seems. Gapped at 0.037"

 

[galaxy]

Out with the old-in with the new at 35,000. I don’t see anything disturbing here; you guys? 4 and 8 look as similar as all the others.

Stock plugs were pretty darn consistently gaped at .052 - .054”.

I figured since the the plug gap was updated, the new ones are going in as gapped out of the box. NGK’s QA is petty good. All eight were pretty much spot on gap at .040” by my gauge.

4 8
3 7
2 6
1 5

8 7 6 5

1 2 3 4

 

[galaxy]

And wow….12 ft lbs feels like nothing, lol.

 

[WItoTX]

I've referenced this thread a dozen times while swapping spark plugs. Thanks for posting OP!

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