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Sparkplugs on a Boosted Maxima

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Old 02-28-2012, 10:38 AM
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Sparkplugs on a Boosted Maxima
Im in the process of tuning my boosted Maxima and I was wondering what sparkplugs would you guys recommended for my application. I know a few guys who have been boosted for a while, and Im sure y'all have y'alls preferences. (OEM specifications, 2 step colder, etc) Any suggestions would be greatly appreciated.
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Old 02-28-2012, 11:25 AM
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I use NGK copper spark plugs, 1 step colder.
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Old 02-28-2012, 11:31 AM
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JWT recommends stock plugs or one step colder with a 0.025 gap. I just set my gap to 0.025 and the car started up much better then when gapped at 0.044.

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Old 02-28-2012, 01:55 PM
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NGK Coppers, 1 step colder.
Gap will be determined on your boost levels. You alwasy want to run the biggest gap possible without experiencing blow out.
Im gapped @.028 but when i was making 10lbs of boost I was gapped @ .034
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Old 02-28-2012, 04:55 PM
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Originally Posted by nismomaxct
I use NGK copper spark plugs, 1 step colder.
Originally Posted by Flava_24/7
NGK Coppers, 1 step colder.



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Old 02-28-2012, 07:36 PM
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Originally Posted by nismomaxct
I use NGK copper spark plugs, 1 step colder.
Me too.
Originally Posted by Flava_24/7
NGK Coppers, 1 step colder.
Me three.
Originally Posted by Flava_24/7
Gap will be determined on your boost levels. You alwasy want to run the biggest gap possible without experiencing blow out.

Exactly. Bold added for emphasis.
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Old 03-01-2012, 09:13 AM
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Originally Posted by furbiss112
JWT recommends stock plugs or one step colder with a 0.025 gap. I just set my gap to 0.025 and the car started up much better then when gapped at 0.044.

Ferhan
Good info. Thanks. What is the part number? Or can you just ask for them by the description above?

Originally Posted by Flava_24/7
NGK Coppers, 1 step colder.
Gap will be determined on your boost levels. You alwasy want to run the biggest gap possible without experiencing blow out.
Im gapped @.028 but when i was making 10lbs of boost I was gapped @ .034
How do you determine how much you need to gap them. Sorry for all the noob questions. I've gone once into boost and it reached 10-11 lbs.
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Old 03-01-2012, 09:59 PM
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Originally Posted by VQtHuRtY
Good info. Thanks. What is the part number? Or can you just ask for them by the description above?
Its listed in the stickies



Originally Posted by VQtHuRtY
How do you determine how much you need to gap them. Sorry for all the noob questions. I've gone once into boost and it reached 10-11 lbs.
Start with .034 and see how that does, Im sure it will be pretty good. If so, try opening them up just a bit untill you feel the car hesitating a little in the upper rpms when going WOT, when you do back the gap down a bit.
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Old 03-02-2012, 02:22 AM
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Originally Posted by nismomaxct
I use NGK copper spark plugs, 1 step colder.
This is what my builder recommended!!
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Old 03-05-2012, 09:53 AM
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Found it. Good stuff peeps. Thanks a lot! Car should be up on the dyno for a tune in the next few weeks. Here's the link in case anyone stumbles upon my thread looking for the same answer.

Originally Posted by JAY25
Go to NAPA to get the copper plugs, you can get them as cheap as $1.20 a piece and up to $1.99 a piece change them out every 20k.

One step colder copper plugs:

NGK # BKR6E-11
Nissan # 22401 - 50Y06

two step colder
NGK # BKR7E-11

The -11 part of the NGK number is multiplied by .004" to get the gap size for an engine producing stock hp. This would make the stock gap 0.044". Most people with SC's and such are running 0.034" - 0.038" in order to further reduce tendency for detonation.
http://forums.maxima.org/supercharge...elts-etcc.html
Last edited by VQtHuRtY; 03-05-2012 at 10:27 AM.
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Old 05-17-2012, 07:04 PM
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Placed the order for the BKR6E-11. Getting ride tuned on May 26th
Last edited by VQtHuRtY; 05-17-2012 at 07:18 PM.
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Old 05-17-2012, 08:10 PM
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I actually used the NGK Iridium one step colder plugs.....on 7psi they will last a long time.
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Old 05-18-2012, 06:55 AM
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Originally Posted by ranmas2004
I actually used the NGK Iridium one step colder plugs.....on 7psi they will last a long time.
Whats the part number?
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Old 05-18-2012, 12:59 PM
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Originally Posted by VQtHuRtY
Whats the part number?
LFR5AIX-11 HEAT RANGE 6 (those are the one step colder plugs) what boost are you running? If low boost then its OK....if you running high boost might want 2 steps colder. I'm running 7 psi so one step colder iridium is just fine.
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Old 05-21-2012, 12:11 PM
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Originally Posted by ranmas2004
LFR5AIX-11 HEAT RANGE 6 (those are the one step colder plugs) what boost are you running? If low boost then its OK....if you running high boost might want 2 steps colder. I'm running 7 psi so one step colder iridium is just fine.
I'll probably run somewhere between 10-12 lbs, but my intercooler pipe is smaller(diameter-wise).
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Old 10-24-2012, 05:13 PM
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Originally Posted by VQtHuRtY
Found it. Good stuff peeps. Thanks a lot! Car should be up on the dyno for a tune in the next few weeks. Here's the link in case anyone stumbles upon my thread looking for the same answer.



http://forums.maxima.org/supercharge...elts-etcc.html
I was just curious if anybody is finding one step colder's between this price range (1.20-1.99) still.. I was just quoted 2.77 a piece. Just wanna be sure that these prices are what's to be expected in these "times."
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Old 10-25-2012, 04:03 PM
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that post is like 9 years old, but are you really worried about 6 bucks bro? $2.59 on advance auto's website. you can save yourself like 93 cents...
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Old 10-25-2012, 04:07 PM
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Originally Posted by Nealoc187
that post is like 9 years old, but are you really worried about 6 bucks bro? $2.59 on advance auto's website. you can save yourself like 93 cents...
Eh... 6 bucks multiple times will add up eventually.. I'll save when i can.. And i was just making sure cuz i was thinking to stock up... Thanks though.. I'll just go grab em before they go up lol
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