Spark Plugs - LTR6AI-13 vs LTR6BI-13 vs LTR6IX-11 vs SP-519 (CYFS-12-Y)

[Burgo]

Apparently all of these plugs will fit my NA 2017 5.0, does anyone know the difference between all of these and which one is the pick of the bunch if money isn't an option?

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[18 Smoke]

Apparently all of these plugs will fit my NA 2017 5.0, does anyone know the difference between all of these and which one is the pick of the bunch if money isn't an option?

Not sure what the difference is in all of them. But I do know the LTR6IX-11 (6509) is the right heat range for NA and [email protected] worked perfect for me and several other coyote owners I know

 

[Schwerin]

They all have the same heat range.

NGK LTR6BI-13
Gap: .053"
Type* : Laser Iridium
Centre Electrode : Iridium tip
Ground Electrode : Platinum pad/chip
Service Life ** 100,000 miles


NGK LTR6IX-11
Gap: .043"
Type* : Iridium IX
Centre Electrode : Iridium tip
Ground Electrode : Nickel
Service Life ** 50,000 miles


NGK LTR6AI-13
Gap: .050"
Type* : Laser Iridium
Centre Electrode : Iridium tip
Ground Electrode : Platinum pad/chip
Service Life ** 100,000 miles

Motorcraft SP-519 - Cant find anything on it.

 

[18 Smoke]

They all have the same heat range.

NGK LTR6BI-13
GAP - .053"
Type* : Laser Iridium
Centre Electrode : Iridium tip
Ground Electrode : Platinum pad/chip
Service Life ** 100,000 miles



NGK LTR6IX-11 GAP - .043"
Type* : Iridium IX
Centre Electrode : Iridium tip
Ground Electrode : Nickel
Service Life ** 50,000 miles



Motorcraft SP-519 - Cant find anything on it.

NGK LTR6AI-13 GAP - .050"
Type* : Laser Iridium
Centre Electrode : Iridium tip
Ground Electrode : Platinum pad/chip
Service Life ** 100,000 miles

Hey man! Can I ask where you found the .043 gap info? My factory plugs were @.050 and owners manual states .049-.053
Thanks

 

[Schwerin]

Hey man! Can I ask where you found the .043 gap info? My factory plugs were @.050 and owners manual states .049-.053
Thanks

It's all from NGK.com

 

[18 Smoke]

It's all from NGK.com

Cool thanks

 

[18 Smoke]

It's all from NGK.com

NGK site shows LTR6IX-11 gap .052. Checked cause I thought I was crazy

 

[Schwerin]

NGK site shows LTR6IX-11 gap .052. Checked cause I thought I was crazy

Sure you're looking at the right number?
https://www.ngk.com/product.aspx?zpid=9887

 

[18 Smoke]

Sure you're looking at the right number?
https://www.ngk.com/product.aspx?zpid=9887

 

[Schwerin]

Seems their own site conflicts lol.

 

[18 Smoke]

Seems their own site conflicts lol.

Yep. That’s why I checked by application. Also didn’t realize they call out different ones for the 18-19, but the 6509 & 6510 work fine. I ran 6509 NA and now run 6510 boosted

 

[blue350gt]

I have a 18 running NA, is the 6509 the correct plug? it didnt show up on the ngk search
what gap should I be running them at?

 

[18 Smoke]

I have a 18 running NA, is the 6509 the correct plug? it didnt show up on the ngk search
what gap should I be running them at?

They work great. Gap them .050

 

[blue350gt]

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"

 

[18 Smoke]

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"

I had spoken with them as well and the 18-19 use 1 step colder plug, so 6510 would be correct. That’s the same plug I’m running now boosted. But I did run 6509 last year gapped @.050. 11.30@124 with no issues

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