NGK 6510 Gap Confusion

[Nodster]

I know this has been covered a lot, I can see by the many search results I got back, but I'm so confused. I was trying to find out the gap for the NGK 6510 plugs to use with my Vortech supercharger which is coming next week (thank you @beefcake!!!).

Some posts mention 0.30" - 0.35" (this was Procharger recommendation):

https://www.mustang6g.com/forums/threads/procharger-supporting-mods.69305/post-1596646​

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Not sure if it's necessary but I think it's certainly recommended. Gap is 0.30 - 0.35 (Procharger commented to stick to 0.35 unless making ridiculous power).​

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https://www.mustang6g.com/forums/threads/procharger-supporting-mods.69305/post-1599796​

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The NGK 6510's is what I use...​

Gapped at .32​

Never do any plug cold, and Anti-seize is your friend. ​

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https://www.mustang6g.com/forums/threads/misfires-2016-gt-procharged-please-help.118126/post-2481425​

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I have tuned countless coyotes since 2011.... all have the gap set to .032 with NO issues.​

The only time I close the gap is cars making 800+ rwhp, and then I run .026​

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99 out of 100 times someone says "I have miss-fires" I pull the plugs and find them cracked, from installation.​

I now have a bucked of spark plugs as a reminder... (they usually crack the rear plugs, due to using the wrong length extension)​

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Looks like Beef recommends 0.28" however:

https://www.mustang6g.com/forums/threads/best-plugs-whipple-on-93-then-e85.85529/post-1913378​

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brisk or ngk , 1 step colder, we typically gap at .28​

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Then we have NGK saying don't move the ground electrode more than 0.12". So if they are gapped at 0.44" that means no less than 0.32":

https://www.mustang6g.com/forums/th...ix-11-vs-sp-519-cyfs-12-y.122516/post-2555838​

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I sent a email to ngk and the response was:​

"Checking the specifications of the original spark plug. You can use the iridium IX LTR7IX-11 stock number 6510, but you will need to set the gap to OE specification, not to exceed movement of the ground electrode by .012"​

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Talk about keeping the ground electrode parallel as well:

https://www.mustang6g.com/forums/threads/misfires-2016-gt-procharged-please-help.118126/post-2481425​

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Ngk 6510's come at .044 out of the box, NGK never recommends closing their gap more then .008, the electrode is no longer parallel to the ground strap then which is important. I run NGK 95822, not only was it specially designed for boosted applications it comes preset at .030 so running them down to .026 is not an issue.​

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So if NGK say no more movement than 0.12", making the gap 0.32" (assuming my plugs are 0.44" - TBC), that would seem to fall in line with the Procharger recommendations. I only have the Stage 1 Vortech Kit with LU42 injectors so I'm assuming I'm not going to make mega power - I was thinking ~650rwhp. Therefore would a 0.32" gap be OK? Or am I likely to see issues and if so, what?

Finally, is it 0.32" or 0.032"? I saw some posts when people were talking specifically about 0.28" gap and they then sometimes say 0.028". Which value is it?

Thank you for helping me out.

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[beefcake]

we typically go right to .28, that should cover you up to around 12 to 14 psi, more than that we start tighening the gap, i run 30 psi on the turbo and we are around 18

 

[gimmie11s]

Gap them to where the car runs the best.

 

[Zrussian13]

Ngk 95822 come gapped at .031 so you can easily go to .028 and work just as well as 6510s. The are a few bucks more per plug though.

 

[LSchicago]

Mine were set to .024.

 

[TheBigChubowski]

I had my car tuned by Lund and they told me .028 so if nothing else check with your tuner.

Edit: I've got the same plugs (good ol' beefcake special)

 

[Proshop]

.027 on my NGK’s.

 

[Nodster]

Thanks for the replies so far. I've reached out to NGK just to see what they say. I'll check with Wengerd as well, good idea, when the time comes. I'm currently leaning towards trying 0.032" (0.8mm). I've ordered a gapping tool and feeler gauges.

 

[Proshop]

Thanks for the replies so far. I've reached out to NGK just to see what they say. I'll check with Wengerd as well, good idea, when the time comes. I'm currently leaning towards trying 0.032" (0.8mm). I've ordered a gapping tool and feeler gauges.

Wengerd will tell you exactly what gap to use!

 

[wazslow]

Thanks for the replies so far. I've reached out to NGK just to see what they say. I'll check with Wengerd as well, good idea, when the time comes. I'm currently leaning towards trying 0.032" (0.8mm). I've ordered a gapping tool and feeler gauges.

Your over thinking this. NGK 6510s gapped at .028 and go. 90% of us forced induction guys run that plug with a gap in that range with no issues.

 

[Nodster]

Your over thinking this. NGK 6510s gapped at .028 and go. 90% of us forced induction guys run that plug with a gap in that range with no issues.

Oh 100% no doubt. I just hate not being able to get a definitive answer.

 

[Nodster]

Wengerd says 0.027".

 

[GregO]

Wengerd says 0.027".

Does Wengerd’s .027” plug gap finalize the gap you’ll set to ?

 

[Cory S]

Mine were set to .024.

This is the money gap. .023-.026”.

 

[SupremeFocus]

0.26 Lund said

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