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I just ordered a JB4 and I see that Burger sells Denso plugs, but all of the info about them is for the Stinger. Anyone running a JB4 have these plugs or something different? I think I did see where you can regap the stock plugs to .026 and use them on map 1?
 

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It's up to you whether you'd want to go with cooler plugs right away or just regap the stockers.. BMS has made comments about map1 likely being "safe" with regapped stock plugs.

I'll add my own data point. Daily driven for a couple thousand miles now, I've found that the stock plugs regapped to be working well so far. That's with 93 octane and a custom map 6, pretty similar to map2. I don't baby the car, but I don't abuse it either. It's also the cool season, but I'll see how the stockers hold up to 90+ degree heat in a few months here in the South. However, if I were gonna beat the piss out of the car and/or track it I'd probably upgrade plugs right away though.
 

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It's up to you whether you'd want to go with cooler plugs right away or just regap the stockers.. BMS has made comments about map1 likely being "safe" with regapped stock plugs.

I'll add my own data point. Daily driven for a couple thousand miles now, I've found that the stock plugs regapped to be working well so far. That's with 93 octane and a custom map 6, pretty similar to map2. I don't baby the car, but I don't abuse it either. It's also the cool season, but I'll see how the stockers hold up to 90+ degree heat in a few months here in the South. However, if I were gonna beat the piss out of the car and/or track it I'd probably upgrade plugs right away though.
So I have 37k on my VN PP and I just installed the jb4 and I kept the stock plugs on it and just regapped to .025 the car was running fine for a few days on the stock plugs on map 3 I beat the **** out of the car it was also running fine for a couple days on a map 6 as well but now when I put the map 6 from 3rd gear and up the car gets a break up after 4500 5k when I put it on map 2 or 3 the car won't let me pass 10lbs of boost in 2nd gear so I put the car back to map 0 and the car has been running just fine hitting 16 to 17lbs in 2nd gear and holding 15 to 16lbs in the higher gears I think it's safe to say that the stock plugs are not good at all they do not like all of that heat on higher boost
 

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Ok, I DO NOT have a JB4 but I run the Scorher. With any piggyback they say to run a colder plug. I have used both the HKS and the NGK. I can tell you the the NGK DOES last longer and there is NO chance of a blow out from increased boost. I have had a blow out with the HKS while in the throttle and let me tell you the car does not like it! I have had NO such instances with the NGK's. The NGK's have a much better ground strap that prevents blow outs. I just wanted to post my findings so people can make a more educated decision. Hope this helps?


Best regards,

-Mike
 

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Ok, I DO NOT have a JB4 but I run the Scorher. With any piggyback they say to run a colder plug. I have used both the HKS and the NGK. I can tell you the the NGK DOES last longer and there is NO chance of a blow out from increased boost. I have had a blow out with the HKS while in the throttle and let me tell you the car does not like it! I have had NO such instances with the NGK's. The NGK's have a much better ground strap that prevents blow outs. I just wanted to post my findings so people can make a more educated decision. Hope this helps?


Best regards,

-Mike
I know this is an old post and I hoping someone will know. Can I use these same plugs on a 19 VN with no PP?
 
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