Spark Plug discussion.

Nate for the win.
After this entire thread Im changing my spark plugs today and will be getting NGK 4306.

 

:thumb2: Excellent info and testing.

 

I am going to pick up a set of the NGK 4306 tomorrow. What gap you guys think I should run with the above mentioned mods? .036? Larger?

 

I ran a 40 and the car feels like a champ.

 

I would say between .036 and .040 should be fine with what you have planned. Maybe even 1 step colder :shrug:





A note on the Pulstars. My friend at enerpulse (i.e. the company who builds pulstar plugs) did some testing on the plugs I was running and from the looks of things the plugs had to high of a resistance on the gap so they suggested a shorter gap on them .035 IIRC. That could have been why I saw what I did but until I get the fresh set in and test some more I can't say for sure.

 

Those Pulstar plugs run around $100 a set right? I take it you are a tester for them?

I didn't know the NGK 4306 have "the one step colder"

You must be talking about the NGK irridiums.

 

For the most part yes, and yes they are about $25 a plug.

I think NGK has a colder plug in coppers just not the 4306 line but yes there is also a colder iridium plug you can run as well.

 

Spark Plug Part No. Stock No. Plug Gap
V-Power LZTR5A-13 4306 .052 --Normal copper plug with V-groove
G-Power LZTR5AGP 3381 .052 --Platinum tip = junk
Laser Platinum PLZTR5A-13 * 4998.052 -- Platinum tip = junk
Iridium IX LZTR5AIX-13 2314 .052 -- Might be good...

All available from the NGK website for 2.4 turbo.

 

great info there on your testing. i had seen those plugs but never heard of anyone actually trying them, at $100 a set no one wanted to be the guinea pig i guess lol. have you done any of the same types of logging with other plugs to compare? just curious as to what types of readings you might get....

 

Got a set of the NGK 4306 today. $8.4X cents for a set and they were in stock for once!
The only way I would buy the Pulstar plugs is if they last for the life of the vehicle and never foul out.

 

I logged with a set of 4306's gapped at .040 and a set of pulstars gapped the same. The numbers I gave for the pulstars use the 4306's as a reference. All of the logging was done on a s1 ecu with a thermal exhaust o2 back exhaust, stock wga.

 

I use these plugs LZTR7AIX-13 (5107).

gapped at .028


no spark blow out at 30psi of big boost from a angry GT35R and over 600hp.

 

sad to say but thats what i pulled out of the car and they were fouled bad- could have been bad gapping from the owner before me??

 

could just be because your car doesn't like those plugs. try a different plug, each car is different and will respond different .

 

Probably due to the fact he isn't pushing 600 horses! Bad gapping too.

 

I don't get a long lifespan from them, but I don't get spark blow out in high boost, which has been a issue with the GT35R...

Gabe made 520hp also with these plugs....

 

Is there really that much of a difference in plug wires?

I mean, I am running the Autozone Duralast wires. They have a lifetime warranty on them. Whenever they go bad or so I think they go bad I get a new set. Would I notice any benefits with a more expensive plug wire? I tried both the MSD and Granatelli's. Both of them did not want to fit on my NGK 4306. They simply did not want to clamp on the plug. Big headache that was. The car came with Accel wires when I got it two years ago. So I really have only tried the Accel and the Duralast.

Is there really any way to test a plug wire out to see if thats your issue?

My car seems to run fine, but stutters at bit when cruising at 40 in 4th gear. I have a new OEM coilpack and NGK 4306 plugs. I am running the coilpack heatshield. Plug wires come with little plastic sleeves that go over them to further help with heat. They only have about 3k on them, but then again they are cheap wires..

Let me know what you guys think.

 

i have an 05 srt4 and a 98 neon R/T. my srt has 30k on it and I pulled my plugs -WOW they were ugly! i switched to NGK v powers @ .035. I was then getting sluggish about 2500 to 3500 right when you need her to hit. so i swithed out my stock wires on the srt for the ones on my 98. ran fine no more lag. i then installed my old srt wires on my 98 and it would not even run on those wires w/ onlu 30K!!!

 

I heard its best to change them out every oil change so Ive had the 4306 since they are cheap and plugs need to be changed often due to the turbo neon...

 

than u heard wrong about changing them out every oil change i also have the 4306 with about 10k miles on them without problems (i dont put many miles on mine a year)