Let's talk spark plugs!

[JDM-JUNKY]

What is your favorite spark plug/ had the best luck with.

Please state what kind of motor and if your running boost or if it's n/a. I think this will be a good topic and if this has been covered recently I apologize. Thanks!

[mowgli 240sx]

im using ngk iridiums on my n/a kade
and im pretty satisfied with them

[godrifttoday]

I rather not

[!Zar!]

NGK BKR7e gapped at .028

/thread

[fliprayzin240sx]

NGK BKR7e gapped at .028

/thread

Those are iridiums right?

I've always like BCPR7ES, gapped down to .030, less if I get some ping. Cheap enough to change them out every other oil changes, at $2 a pop.

[brndck]

bkr7iex on my redtop sr. never had any issues with em.
i ran champion coppers for quite a while, just changed em out about once a year to be on the safe side. car only gets maybe 5k miles a year and coppers are cheap anyways.
always gap to .030 and use anti-seize.

[!Zar!]

Those are iridiums right?

I've always like BCPR7ES, gapped down to .030, less if I get some ping. Cheap enough to change them out every other oil changes, at $2 a pop.

The BKR7e is standard one with the resistor. I pay about $2~ per plug as well.

The BKR7iex is the iridium one.

Isn't the bcpr7es a plug without a resistor?

What does the resistor even do?

[KiLLeR2001]

NGK BKR7E (copper) gapped at 0.030.

edit: Redtop SR20DET, stock power.

[K_style]

I use NGK R5671A-9 (Copper) on my SR. I am not rich like all of you so can't afford iridium LOL.

Instead, I change them after every tack day or oil change.

[brndck]

has anyone ever tried pulstar plugs on a sr? i remember emailing them right when they came out and they didn't have an application for sr20.
The world's most powerful spark plug from Enerpulse (http://www.pulstar.com/)

[K_style]

has anyone ever tried pulstar plugs on a sr? i remember emailing them right when they came out and they didn't have an application for sr20.
The world's most powerful spark plug from Enerpulse (http://www.pulstar.com/)


Sounds pretty expensive considering you have to pay for shipping.
Is there any retailer sells their spark plugs? I couldnt find on their website..

[di-devol]

BKR7e's .022, I need a coil upgrade.

[Future240]

This thread has potential for good info, moved to chat.

To get the convo going.

Has anyone ever measured performance gains/loss due to spark plugs?

[hOngsterr]

steve shadows iirc said for spark plugs to be gapped at .028 for power i believe.

[SomeoneWhoIsntMe]

I use BKR6E so BKR7E's in every-fucking-thing with plug wires, are they the correct height to work with coil-on-plug ignition jap motors like the RB20? I know there's two different standards, ISO and JIS...

[turbociv910]

gas mileage/emissions- run iridium, platinum.

want power, run copper.

end of thread.

[Kaifd3s]

BKR7EIX S14 blacktop. I just keep the receipt from Advance and warranty them whenever I feel like changing them. They come with a 3 year warranty ;)

[Jersthecool]

NGK BKR7e gapped at .028

/thread

Exact same as me. Works perfectly.

[Future240]

gas mileage/emissions- run iridium, platinum.

want power, run copper.

end of thread.

Care to further explain that?

[turbociv910]

Engines get better gas mileage and less emissions the hotter they are, that is why most cars have an operating temp of 200-220. Some iron blocks are 230!. Iridium increases heat increasing fuel mileage. Hotter everything is, the air the engine is consuming is less dense(= less fuel). Just like when its cold you expect more power right?

Copper runs cooler, has colder spark(naturally) to reduce detonation for higher horsepower and aftermarket applications. Many, countless times have i taken out iridium plugs in exchange for copper and gained power, or got rid of a miss fire.

never buy "iridium racing" plugs for your car, you will waste the $$ and i will say i told you so.

downside is that a copper plug wears out twice as fast, but who cares when they cost $3 a piece.

[JDM-JUNKY]

BKR7e's .022, I need a coil upgrade.

Go ls2 truck coils I am planning on using them on my build. They are cheap and I have hear very good things about them.

[supakat]

BKR7E @ .036 @ 23 psi with Corn and LS2 Coils. Before, 20 psi and stock dizzy and coil rewire, I was running .030.

[supakat]

BKR7e's .022, I need a coil upgrade.
KA-T.org - The Home of 1000+ whp/7 sec Turbo KA's (http://www.ka-t.org/s13_ignition_rewire.php)

[landins13]

BKR7E's at .028 when I had a SR

[sqd]

Those are iridiums right?

I've always like BCPR7ES, gapped down to .030, less if I get some ping. Cheap enough to change them out every other oil changes, at $2 a pop.

I run the same plugs, only 9s (BCPR9ES), also gapped to .030

[boniomario]

I use 95 Supra Spark Plugs NGK brand gapped at 0.3 with heat range of 7 one above the stock spec

I change them out almost every month running 15 lbs of boost S14 SR20DET

[supakat]

Majority of the time with NGK, the number in the plug model is the range. BKR7E is 7 and BPR9ES is 9 heat range. Stock is BKR5E or optional 6E.

[boniomario]

thanks learn something new everyday, I just walk in there ask for the heat range LOL

[Irresistible]

What exactly does gapping the plugs do? Would it benefit anything on a stock KA?

I recently bought NGK Iridium plugs, and NGK cables just need to put them in.

But I also am planning on going KA-T next year, so would gapping the plugs help then?

[supakat]

Gapping plugs down to a smaller gap is needed when you experience blow out. Stock gap is best gap for stock KA. Please follow the FSM.

[turbociv910]

gapping plugs down looses power, wider gap = better burn. If your having to gap your plugs down to very small ammounts, you need to upgrade.

[Tempo]

NGK iridium plugs and bosch wires because i didnt want to wait for ngk wires to come in :D

stock ka24de

[supakat]

Wider gaps do not make a big difference in power, but burn more efficient which helps with idle, cruise and start up. It is the cylinder pressure (causes blowout) that decides if you need to close your gap so the spark can jump. I am running LS2 coils and could probably open up to .044 since they burn hot as hell. I get a blue spark from these bad boys.

Spark Plug Installation Instructions (http://www.ngksparkplugs.com/techinfo/spark_plugs/installation.asp#gapping)

[qay2fotayesex]

I run an NGK BKR8EIX gapped to .020

On an SR with a 3076r turbo making 477hp. works perfectly for me and i don't have to replace my plugs every other week as i would with copper ones.

[silviaNC]

So much to learn. Im about to finish my build and was wondering what sparkplugs to get. Running built sr and gt3071 ( if it matters) 740 nismo inj. With a goal of +450. What kind of. Spark plug will work for me??

[rb25_s13*CHUKI]

NGK Bkr7e coppers gapped at.26

[rb25_s13*CHUKI]

gapping plugs down looses power, wider gap = better burn. If your having to gap your plugs down to very small ammounts, you need to upgrade.

Not true, My dad ran .22 gap on his Evo 8 with buschar coilpacks which has plenty of spark

[OuTLaVvZ]

if i get brk6e for mostly stock sr , do i need to regap or is it just plug and play?

[Punished]

if i get brk6e for mostly stock sr , do i need to regap or is it just plug and play?


I have never bought spark plugs that didn't need to be properly gapped.

[Neon_rain519]

NGK v-groove side gapped

[frabus]

Bkr5e 11 NGK coppers on my n/a ka24de per the FSM. I just change them often about every 10k miles never had any issues.

[s13mikesr20]

bkr7e enough said

2 dollars a plug and im making over 450 hp thank you

[s13mikesr20]

sr20det that is

[PureRush]

Engines get better gas mileage and less emissions the hotter they are, that is why most cars have an operating temp of 200-220. Some iron blocks are 230!. Iridium increases heat increasing fuel mileage. Hotter everything is, the air the engine is consuming is less dense(= less fuel). Just like when its cold you expect more power right?

Copper runs cooler, has colder spark(naturally) to reduce detonation for higher horsepower and aftermarket applications. Many, countless times have i taken out iridium plugs in exchange for copper and gained power, or got rid of a miss fire.

never buy "iridium racing" plugs for your car, you will waste the $$ and i will say i told you so.

downside is that a copper plug wears out twice as fast, but who cares when they cost $3 a piece.

I'm sorry but I have correct this since you're wrong in so many ways.

The electrode which can be made of copper, iridium, platinum, etc does not effect the temperature inside the cylinder. The amount of insulation under the white ceramic shell on the spark plug determines the temperature of the spark plug (Heat Range can be a Hotter/Colder Spark plug). Thats why higher hp motors usually have one step or two step colder spark plugs. Different electrodes only determine longetivity of the spark plug. Top fuel drag cars use basic copper spark plugs that many of you use.

There's no such thing as a stronger/weaker/colder/hotter "spark". A spark is a spark and nothing else. What determines performance is the gap. Gap should be determined based on the engines OEM specifications or secondary ignition system output if aftermarket.

Also spark plugs (If using the correct ones) can NEVER cause detonation. The only way you can is if you use the incorrect spark plug that is a hotter heat rang or has a longer reach which will increase the compression (That is if it doesn't hit the top of the piston). I think the word that you're looking for is "misfire". Can be caused by usually incorrect gap. Spark plugs come already gapped to OEM specs but I always double check.

WARNING: IRIDIUM SPARK PLUGS SHOULD NOT BR GAPPED. THE ELECTRODE WILL GET DAMAGED!

[jamg]

so...

NGK BKR8EIX

OR

BKR7EIX

???

[leung]

so...

NGK BKR8EIX

OR

BKR7EIX

???


That obviously depends on how much power you're making. I believe its one step colder for every 100hp up. 6 is stock.

[hOngsterr]

bkr7eix, i believe their pregapped .35 last time i checked myself lol

[jamg]

That obviously depends on how much power you're making. I believe its one step colder for every 100hp up. 6 is stock.
300whp

colder, as in going down in numbers?

[silviaNC]

Just got a set of bkr8 for my build. Shooting for 450-475hp

[AdamR]

Just wanted to chime in to say that NGK says to not use anti-seize on their plugs.

[project-D180]

i use ngk or autolite ir ..i like them better than denso

[dawagarage]

Just wanted to chime in to say that NGK says to not use anti-seize on their plugs.

+1 http://www.ngksparkplugs.com/pdf/TB-0630111antisieze.pdf

[Corbic]

A/C Delco. At $1 a piece you can't beat it. I change plugs like I change socks anymore.

[!Zar!]

I never knew that about the anti seize. OH WELL

[pewpew]

currently running bkr7e in my red top SR w/splitfire coilpacks, 425whp

should I change/stay the same, and suggestions on my gap setting?

[Zed Nismo]

Just to share some opinion and personal experiences with spark plugs, I think HKS Iridiums are the best spark plugs out there for turbo cars. I know many will chime in here and flame me saying otherwise. I am not saying that NGK Iridiums are not good (That's what I currently have in my S13 and I am not complaining) but yes, I have had experience with HKS Iridiums and they are just the BEST hands down. If you really look at the design of the HKS plugs, you will see that you get less vibration so the gaps don't change. Many will scratch your heads, but some people know what I am talking about. Just look at the HKS spark plugs and the NGK/Denso (whathaveyou) and you will see that the HKS spark plugs have a shorter electrode that is much more resistant to vibration. The insulation is much different and well, I don't have any pictures to back up my opinion at the moment, but I will take some pictures and post them up so people can see and understand where I'm coming from. It is also designed to take high boost. I'm sure the problem that many of you have with ignition/misfire/detonation is in regards to running a hotter plug then necessary for your application, but I will guarantee any of you, get the HKS plugs and you will never look back.
I have not had experience running the plugs in an S-chassis. However, I have had experience in a couple Supra's and IS300 with a VVTi 2JZGTE and the plugs make a world of difference compared to the Denso plugs or even the NGKs. The performance of the car is just amazing and smooth throughout the power band and does not sputter or "give out" at higher RPM's or under higher boost levels.
I will post picture and specifics of the HKS spark plugs. I should have a couple laying around the shop. The difference with running HKS plugs and NGK is instantly noticeable. Now I can't say that you will get 20whp just by upgrading to HKS nor am I a rep for HKS by any means. I am just stating my opinion and experience with this particular spark plug.
Many people don't want to "waste" $20/per plug for the HKS units, but I think it's a great investment. Especially when you are putting so much money into the motor, turbos, manifolds, front mounts etc. I think the $80 for a set of HKS plugs is well worth the outcome. Yes I will be getting these plugs in the near future and I am not telling everyone to go ahead and buy these. But I do believe in all of HKS products and think that these plugs are the absolute best for Boosted motors.

[fliprayzin240sx]

HKS sparkplugs are just rebranded NGK Iridiums.

[TheZ31Guy]

I use NGK V-powers on my L28E with a Turbo slapped on it, shooting at 10PSI gapped to .032 and I love it everyday. Not sure why I gapped it so low, but it does feel a bit nicer in boost now that I did. Stock gap is .044 but I remember some of the plugs not being gapped there, so I was thinking about regapping my plugs to .045 or so. She ran fine either way but seems smoother with a smaller gap

[Zed Nismo]

Find me NGK plugs with the same design as the HKS and I will believe that. Yes NGK does make the plugs for HKS but that does not mean it's the same thing as the NGK's. The design is different and better suited for boosted cars. I have the HKS plugs at the shop so I will take some pictures and get back to this thread when I have the chance.
Again, not hating on NGK or other brand of spark plugs out there.

[KoukiMonsta]

Bkr7e at .28

Sr, not very stock at all

These plugs are cheap, change them often.

[AXV]

Yea I'm reviving and old thread but better than making another thread. I am getting new plugs tomorrow. I have iridiums in there right now in my KA24DE but planning to get copper ones. The only "mod" I have on my s13 is a catback exhaust. Will I be ok with using stock FSM recommended gap? Or do I need to change it?

Thanks guys

[!Zar!]

Stock is fine.

[AXV]

Thanks! NGK V Power should be good right?

[!Zar!]

The V powers are ngk bkr7e. Those are fine.

That's all I run.

[S T Y L E S]

What's would u guys recommend for a stock KA? Brand, heat and gap??

[dawagarage]

btw if you guys are interested i have some NGK schwag for sale
fender protectors, coffee mug, water tumbler.
http://24.media.tumblr.com/1fd9cc8f8cc17f16aac04f460e37df7a/tumblr_mh7go0p8o21qe7x6po1_500.jpg

[EsChassisLove]

Engines get better gas mileage and less emissions the hotter they are, that is why most cars have an operating temp of 200-220. Some iron blocks are 230!. Iridium increases heat increasing fuel mileage. Hotter everything is, the air the engine is consuming is less dense(= less fuel). Just like when its cold you expect more power right?

Copper runs cooler, has colder spark(naturally) to reduce detonation for higher horsepower and aftermarket applications. Many, countless times have i taken out iridium plugs in exchange for copper and gained power, or got rid of a miss fire.

never buy "iridium racing" plugs for your car, you will waste the $$ and i will say i told you so.

downside is that a copper plug wears out twice as fast, but who cares when they cost $3 a piece.


Had misfire with my .30 Iridiums. Swapped to cheap copper and .25 gap and misfire disappeared.

Going to dyno with Iridiums and then switch to copper to see a difference.

[EnemyS15]

Awesome info ! Here, I have been reading up on heat ranges and what not. Definitely going with Ngk iridiums. Thought about going with a heat range of 8 for my 460-530 hp rb25. I have the general hp range due to my over all tune. Do you guys think 8 is a suitable heat range. It's still pretty new fresh material I am learning.


I have always just went with copper. Never had any probs, cheap, replace 1x a month with my monthly oil change on my previous cars. Iridium comes around and now takes the stage when it comes to spark plugs.

[ILoveJDM]

Ive used a few types of DENSO iridiums

IK20
IK22
IK24 (currently using)


HEAT RANGE INFO COMPARABLE

DENSO 16 20 22 24 27 29 31 32 34 35
NGK 5 6 7 8 9 9.5 10 10.5 11 11.5
CHAMPION 12,11 10,9 8,7 6,63,61 4,59 57 55 53
BOSCH 8 7,6 5 4 3 2

I used the IK22 last year, the white stuff ended up actually cracking and going through my motor. Currently on the IK24 with 20psi 400whp sr22det and theyre great.
only downside is that theyre $10 a plug. Not bad since I just came back from owning a rotary....$40 set of plugs ..which i changed all the time

[S T Y L E S]

What's would u guys recommend for a stock KA? Brand, heat and gap??

Anybody? Looking to replace it out this week

[EsChassisLove]

Replace them with stock.

[rightcoastimports]

edit:: running BKR7E .28 gap on s13 sr 12-13psi