School me on spark plugs.

[vortecd]

I have another thread somewhere about it. Or maybe vortecd made the thread. We both went to the same track same day. Same 60ft and I picked up like 2 or 3 mph with the stock box.

MPH may have been different in each lane like it does sometimes but we both picked up .07 with stock air box

 

[jonx96]

MPH may have been different in each lane like it does sometimes but we both picked up .07 with stock air box

Just to clarify .07 et.
2 runs with lmi 1 with stock box. The second stock box pass got rained out

 

[vortecd]

Didn’t know that at first but caught it somewhere along the way and was happy to hear that news but THANKS for pointing it out here again. It’s why I mentioned all the stuff about ground strap showing heat range is good and soot marks on threads showing the same thing backing up the one heat range colder you mentioned is liked with increased boost and corn. I like this plug too!! 👍

stock is a 7 heat range the NK 2309 are also a 7

 

[vortecd]

NGK 93893

So after doing some research stock heat range is a 7. The NGK 2309 is a 7. The plugs you choose are a heat range hotter being a 6 and should be a gasket type not a tapered type.

 

[fumanchu182]

So after doing some research stock heat range is a 7. The NGK 2309 is a 7. The plugs you choose are a heat range hotter being a 6 and should be a gasket type not a tapered type.

The stock spark plugs are in the catalog as: "SP196724AB". When cross referenced in RockAuto here: https://www.rockauto.com/en/catalog...supercharged,3309929,ignition,spark+plug,7212 you will see that NGK 93893 are in that list. If you look at the photos posted in previous pictures you will see that the stock ones are gasket based.

I am using that post on the “other” forums lol. So far Ive found that the previous owner was a jackass. Ran boostane…

View attachment 53774

The ones pictured here are gasket based:
https://highhorseperformance.com/mopar-oem-6-2l-hellcat-spark-plugs-sp196724ab/

The ones pictured here are gasket based:
https://store.mopar.com/oem-parts/mopar-spark-plug-sp196724aa

The reason I reference AA instead of AB is because my car was just found to be discovered to be a sub 100 car linearly off the assembly line and out the door 10/14 (talk about a piece of history I have in my hands now and I beat the piss out of it).

I did my research and tried to put the best plug in my car cause I race it and want it to perform well, please show me your research where the plugs are range 7 and tapered?

 

[vortecd]

The stock spark plugs are in the catalog as: "SP196724AB". When cross referenced in RockAuto here: https://www.rockauto.com/en/catalog...supercharged,3309929,ignition,spark+plug,7212 you will see that NGK 93893 are in that list. If you look at the photos posted in previous pictures you will see that the stock ones are gasket based.



The ones pictured here are gasket based:
https://highhorseperformance.com/mopar-oem-6-2l-hellcat-spark-plugs-sp196724ab/

The ones pictured here are gasket based:
https://store.mopar.com/oem-parts/mopar-spark-plug-sp196724aa

The reason I reference AA instead of AB is because my car was just found to be discovered to be a sub 100 car linearly off the assembly line and out the door 10/14 (talk about a piece of history I have in my hands now and I beat the piss out of it).

I did my research and tried to put the best plug in my car cause I race it and want it to perform well, please show me your research where the plugs are range 7 and tapered?

It is a gasket I saw taper cut in description. I was trying to post and ran out the door. If I'm wrong on any thing then that is my mistake. I saw it said heat range 6 so you can do your own research and see if you are fine with that. Stock appears to be 7

https://www.ngk.com/ngk-93893-lfr6aix-iridium-ix-spark-plug

 

[vortecd]

Here is the stock plug

https://www.boschsparkplugs.net/bosch-9748-fr7si332-0242236655-iridium-spark-plug

 

[vortecd]

on rock auto site it shows bosch 9748 (#9745) what ever that means. The 1st is a 7 heat the second is a 6

 

[fumanchu182]

Resurrecting a dead thread? Im potentially seeing 18-20 psi now. Saw 18psi on a quick blip. What is the appropriate plug range and gap for this?

 

[Magnified]

Nice chart.

 

[fumanchu182]

Nice chart.

Thank you, been looking at https://www.sparkplugs.com/manufacturers-numbering-systems

 

[vortecd]

The 2309 NGK would be 1 heat range colder. I have been running them this year and so was @jonx96 and @16GoManGoHC2

 

[fumanchu182]

2309 NGK

any specific gap?

 

[Mean Cat]

At your boost prob. .026 > .028

 

[vortecd]

I used to run .030 at 20 psi on my Mustang. I gapped mine at .028 on the Hellcat. You could go lower if you want

 

[fumanchu182]

At your boost prob. .026 > .028

thank you, @16GoManGoHC2 thoughts? I saw you hit 20psi the other day

 

[Mean Cat]

So if I remember correctly - the stock plug is Bosch heat range 7.
The NGK heat range 7 is 1 step colder.

 

[fumanchu182]

Got 16 of the LFR7AIX at rock auto. 107 bucks, considering the economy I'll take it. Also got a spark plug gapping tool from Amazon, not going to play games on this go around considering the time it takes to get them out. Now next is choosing a gap. Conventional wisdom has it at .26, still haven't heard from @16GoManGoHC2, I Know @zhc has a very high horsepower car and so does @Marc W any recommendtions from you guys?

 

[zhc]

I’m pushing well north of 1600+ whp, not exactly an apples to apples comparison. I prefer Brisk but there seems to be a fair amount of folks who have experienced issues with them. I personally have never had an issue. I prefer them over NGK iridium’s because they’re more likely to melt before actual real damage occurs if things get too hot for whatever reason,

Real example, had a guy’s ice tank pump stopped working before a pass and melted plugs in one of the cylinders on what would have been a mid 8 second pass. I believe, if it had ngk’s in there, it would have hurt something else instead.

As for plug gap, if there’s a question on whether to go bigger or smaller, try smaller. Saves you trouble later if/when it blows out spark cause the gap is too large.

Normally I recommend .025 - .026 for a setup like yours. Use whatever brand you’re comfortable with.

 

[16GoManGoHC2]

thank you, @16GoManGoHC2 thoughts? I saw you hit 20psi the other day

NGK 2309 at .028 have been working great. Remember the bigger the gap the bigger the spark and more molecules get lit off. I’d go no bigger then .028 at 20 psi, in good air I’ve seen 22 psi and no problems at .028”