WHAT PLUGS ARE YOU RUNNING WITH YOUR JB4

[WHITEGT]

Denso. Got them from BMS when I ordered my JB4. I run map 2 daily, go to 3 and 5 occasionally when using E30. Pretty much always in sport mode and I drive spirited when conditions allow. No problems yet!

5346 step 1 or 5347 step 2?

thanks

 

[cncBilly]

5346 step 1 or 5347 step 2?

thanks

5346 it’s in my sig

 

[Stingin' Away]

Did it my self. Your first time will be tricky. After that it will be like childs play. Save your money do them yourself, you’ll be very happy you did when you finish.

Did the Denso come pre-gapped?

 

[General_Vodka]

Did the Denso come pre-gapped?

I think they do if you get them from the forum store. I got the HKS and they came pre gapped

 

[Stingin' Away]

I think they do if you get them from the forum store. I got the HKS and they came pre gapped

How long have you been running JB4 with the HKS plugs? Any issues?

 

[General_Vodka]

How long have you been running JB4 with the HKS plugs? Any issues?

sorry, no JB4. Also, the HKS are new, the previous owner used stock plugs. So far I am pretty happy with the HKS with the stage 2 tune. However, I would be very surprised if anyone gets issues with HKS. Literally no one complains about them. Ask in a few months, since I beat on that engine a lot.

 

[Hockster]

Denso's are NOT pregapped. HKS claims to be but always check.

 

[cncBilly]

Did the Denso come pre-gapped?

No.

 

[ecko04]

Did the Denso come pre-gapped?

Technically speaking, all plugs come pre-gapped; in that the insulator is bent towards the electrode. Whether it comes with the appropriate gap for your specification is where you need to measure, confirm, and adjust.

Basically, never trust a pre-gap.

 

[turboAWD]

I bought a used jb4, which included a set of used (for a few thousand miles) Densos. I re-gapped / checked just to be sure. I've done like 5000 miles on the jb4/Densos so far in a year (without Covid would have been a few thousand more). Run the (current) maps 0-3.

Based on various reports / people looking at their Densos after 20k miles, etc, I'll probably look into replacing mine at 15k (sometime next year, most likely). May put the re-gapped OEM plugs in for a year - haven't heard of any real issues with re-gapped OEM plugs - and after that, probably buy some HKS.. Or, I may go straight to HKS next year. Densos seems to be hit-or-miss in terms of quality control. Some suspicion of fakes being shipped through Amazon, and even BMS - badly soldered tips, etc. Haven't seen that with the HKS.

 

[Stingin' Away]

Technically speaking, all plugs come pre-gapped; in that the insulator is bent towards the electrode. Whether it comes with the appropriate gap for your specification is where you need to measure, confirm, and adjust.

Basically, never trust a pre-gap.

Thank you for explaining out loud what I was asking; I figured you knew what I was asking. But that does sound like a fun game:

Technically speaking, all cars are meant to start; in that the electronic starter is receiving power from the battery

 

[Wongus]

A shop is most likely going to charge you shop rates. Also, you aren’t voiding the warranty by changing the spark plugs — they’re routine maintenance.

Changing the plugs isn’t difficult. As long as you have a decent tool set, some extensions, and a lot of patience. I would estimate an hour and a half on the first go round with you being very meticulous.

Subsequent changes would take under and hour once you have it down.

It’s not hard. And to pay a shop 3-4 hours of shop time is absurd unless you have money to blow.

Now if you don’t have a garage and you’re changing them in the blistering heat then I can see why you’d be inclined to pay someone. But assuming you have some shade, tools, and time — then I don’t see why you can’t get it done yourself.

Did you have to gap the hks
spark plugs too?

 

[ecko04]

Did you have to gap the hks
spark plugs too?

It is good practice to verify and gap all spark plugs, even if they are supposed to be pre-gapped.

 

[Wongus]

It is good practice to verify and gap all spark plugs, even if they are supposed to be pre-gapped.

Gotcha. What is the size they should be gapped to? I think I've seen a few different #s

 

[ecko04]

Gotcha. What is the size they should be gapped to? I think I've seen a few different #s

.024

 

[Brianong18]

I bought a used jb4, which included a set of used (for a few thousand miles) Densos. I re-gapped / checked just to be sure. I've done like 5000 miles on the jb4/Densos so far in a year (without Covid would have been a few thousand more). Run the (current) maps 0-3.

Based on various reports / people looking at their Densos after 20k miles, etc, I'll probably look into replacing mine at 15k (sometime next year, most likely). May put the re-gapped OEM plugs in for a year - haven't heard of any real issues with re-gapped OEM plugs - and after that, probably buy some HKS.. Or, I may go straight to HKS next year. Densos seems to be hit-or-miss in terms of quality control. Some suspicion of fakes being shipped through Amazon, and even BMS - badly soldered tips, etc. Haven't seen that with the HKS.

What did you gap the stock plugs to? I only have 2k miles on my car so I figure I could probably run the stock plugs gapped for maybe 10k miles before switching.

 

[turboAWD]

What did you gap the stock plugs to? I only have 2k miles on my car so I figure I could probably run the stock plugs gapped for maybe 10k miles before switching.

I have not gapped the OEMs. I did 0.024, IIRC, for the Densos. IIRC, OEM is either 0.026 or 0.024. But double check.

 

[1st sting]

Don't have a stinger yet but it's coming.
With my optima sxt, I hava dp, intake and jb4 with m40xl plugs Gapped at 0.028 and on 2 separate occasions I got a loose insulater on cyl 2. Are regapped stock plugs good enough on a jb4 tuned stinger running map 1-2?

 

[cncBilly]

Don't have a stinger yet but it's coming.
With my optima sxt, I hava dp, intake and jb4 with m40xl plugs Gapped at 0.028 and on 2 separate occasions I got a loose insulater on cyl 2. Are regapped stock plugs good enough on a jb4 tuned stinger running map 1-2?

Some have with no problems but if you’re going through a plug change may as well upgrade. Regap and save the stocks for spares....you’ll likely never use them.

 

[1st sting]

Some have with no problems but if you’re going through a plug change may as well upgrade. Regap and save the stocks for spares....you’ll likely never use them.

True. Is HKS the way to go?