NGK Iridium BPR8EIX spark plugs

[EVO-00X]

Hi guys
Im about to purchase some new spark plugs and was going to buy a set of the normal copper centre NGK BPR8ES plugs for my engine, however Im also considering paying a bit more for the NGK Iridium BPR8EIX spark plugs.
Has anyone here ran both different types of plugs on 24psi+ applications? Did you notice much difference with idle, acceleration and top end? Also how often do you replace them?
Id assume everyone here changes the normal BPR6/7/8ES plugs every 5,000kms or after several runs on the track... therefore are the iridiums actually more cost efficient and provide noticable benefits straight out the box?

 

[ONPSI]

Don't waste your money IMO, for how much you drive it (most probably like myself, once a week if that) it's easier to replace them more often with the 8es. Lighter on the pocket to replace them more often

 

[ted]

Im interested in the champion special metal plugs,the heat resistance and transfer is incrediible. but as onpsi said properly gaped run of the mill plugs 8e's will do the job just fine.

 

[caged]

Iridium are good on direct fire when the ignition system is maxed, they will give you a bit of head room. They are not as good on waste spark because of the multi direction spark. Champions have never lasted as long as ngk on my set ups and I only use them if I cant get ngks (usually the bkr range in 8's to suit gsr, 2jz ect). I use br8es which is the non projected tip version of the bpr8es, they can last up to 10,000kms on direct fire and half that on waste spark.

 

[EVO-00X]

Oh forgot to mention that Im running 4 x individual Haltech (Bosche LS1) coils in sequential mode, not wasted spark.
Im not running CDI, dont need to yet.. maybe never.

Also consider proices when the normal NGK's can cost around $20 set, but the Iridiums can be bought for $50 set delivered from the U.S.
Locally the iridiums price between $70-$100 set.

 

[EVOCPE]

Iridiums suck rob, waste of money, just stick to the standard plus just regapped

 

[JETGSR]

if you're serious rob, it comes down to flame kernel and the shape and direction, which you will get a better kernal from a iridum or simular.

ngk V grooves aren't bad and cost about $4 each

I'm using a plug that Mark from Godzilla put me onto, they are the same that he fits to the GTR's he tunes
can't remember the numbers but they are 16mm and 8's from memory and platinum's but I have never had a misfire at 0.8mm of gap and 20psi

running the v groves at the moment with the run in on the new motor.

if you're now tring to screw the last drop out of it, like everyone else just go the V groves.

 

[EVO-00X]

Thanks Troy, I found a thread on evolutionm forum where our very own JC Evo1 got in on the conversation lol: http://forums.evolutionm.net/evo-engine-turbo-drivetrain/602316-ngk-br8eix-against-bpr8es-review.html
By user feedback, it appears that they are worth a try at least as some people dont notice any difference but others have noticable different at idle and high rpm.

 

[DOUGMO]

I was always a copper boy until I started to use iridiums Rob, in saying that every car seems to react in a different way to them.

Definatley worth trying them

 

[SIVART]

Ive always run them , I find the car to get more responce and better fuel eccomony

but my evo is using BPR7EIX , Im pretty sure

 

[JETGSR]

If you're going to go the iridums you may as well index the plugs at the same time!

it doesn't take much more effort! and you get the benefits of the nice flame kernal.

Troy

 

[EVO-00X]

Yep I already ordered 4 iridium plugs last night for a total of $49.10 including delivery to my door
Oh I'll be indexing them alright, provided I can screw them in until the gap faces the valves :lol:

 

[milkandoj]

Reason i don't even bother with iridium is on the ecmlink tuning forums everyone says just use copper NGK plugs and they all do.
There lots of people all right into their tuning and talking about plugs and plug gapping and heat range gets discussed.
So i just stick with what the consensus is on a tuning forum.

While i don't want to do a big thread search i did read somewhere that copper plug give a better spark while the rare metal plugs last a lot longer hence manufacturers moving to them to make servicing cheaper. That may be wrong though.

 

[bazeng]

Not recommended for CD I so i haven't tried... I do remember my first time with the galant and using them. I do recall a smoother idle and smoother drive...

 

[4piknup]

Use iridiums if you have a Subaru or v8 or motorbike that is a real pita to change the plugs, otherwise don't bother

 

[EV0300]

Reason i don't even bother with iridium is on the ecmlink tuning forums everyone says just use copper NGK plugs and they all do.
There lots of people all right into their tuning and talking about plugs and plug gapping and heat range gets discussed.
So i just stick with what the consensus is on a tuning forum.

While i don't want to do a big thread search i did read somewhere that copper plug give a better spark while the rare metal plugs last a lot longer hence manufacturers moving to them to make servicing cheaper. That may be wrong though.

Dont think thats right Iridium has a cleaner spark because the metal has a better transfer, the reason people are so afraid to use them is because if you dont gap them right you fuck the plug. by gapping right i mean you cant touch the metal at all so it has to be done very carefully.

 

[Jayz-1]

I used to run copper with about a 0.7mm gap but would get the occasional miss fire even with brand new plugs went to iriway9s (9 heat range iridium basically) and haven't had an issue. Even with the 0.8mm standard gap.
Stock ignition 28ish psi.

Regards
Jason

 

[EVO-00X]

Been reading up about them all over the place and these couple of videos pretty much describe why iridium is the better choice overall.
It'll be ignorant of me not to try the iridiums based on the technology, superior flame kernal and more efficient burn.
Nonetheless I'll be taking a set of both NGK iridiums and NGK coppers to the tuners with me next time

Copper vs Platinum vs Iridium plugs - Great videos that are easy to understand.
Note first vid is from Honeywell that make the Autolite range of spark plugs.

http://www.youtube.com/watch?v=7N-7WGfnKHo&feature=related

http://www.youtube.com/watch?v=SLI9mkBDmSA&feature=related