Iridium spark plugs.. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-27-2007, 02:27 AM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2007
Location: SoCal
Posts: 284
Total Cats: 1
Default Iridium spark plugs..

Yay or Nay?

Worth the money?
Exhondaman is offline   Reply With Quote
Old 06-27-2007, 04:27 AM   #2
I'm Miserable!
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,591
Total Cats: 0
Default

nope, stick with the v-powers. I cracked an Iridium plug a few years back and put the NGK's in with no issues since.
zoom2zoom is offline   Reply With Quote
Old 06-27-2007, 06:16 AM   #3
Senior Member
iTrader: (2)
 
Join Date: May 2007
Location: Tampa, Florida
Posts: 502
Total Cats: 0
Default

+1
Only reason I used iridiums, is because the casheir at pepboys always rang me up for one sparkplug. (so I always ended up paying 8 bucks for a pack of 4.) Not sure if she still works there...
drewbroo is offline   Reply With Quote
Old 06-27-2007, 07:02 AM   #4
jif
Junior Member
 
Join Date: Mar 2007
Location: Auckland, NZ
Posts: 49
Total Cats: 0
Default

I like 'em

NGK Iridiums (freebies!) ATM, which run no probs ~12psi. The Densos they replaced started misfiring after about 6 mths (only under boost). The regular NGKs that those replaced (damn mechanic) worked fine.

Moral of the story - NGK, FTW d00d...

oh yeah, NGK Max are the double iridium/platinum plugs which should work more consistently with that whole wacky wasted-spark reverse polarity thing...
http://www.ngk-sparkplugs.jp/english...ium/index.html (Do you tune the engine? )
jif is offline   Reply With Quote
Old 06-27-2007, 11:35 AM   #5
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

I like the iridiums because of the fine tip on the center electrode. in THEORY you could run a slightly larger gap... I use the IK22 or whatever IK2* is the right size and heat range. I forget.

and come on, price wise, it's not like you buy them often.
y8s is offline   Reply With Quote
Old 06-27-2007, 11:48 AM   #6
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,236
Total Cats: 288
Default

what gap do the iridiums run at under boost? how much boost?
m2cupcar is offline   Reply With Quote
Old 06-27-2007, 12:45 PM   #7
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

for the life of me I can't find it. isn't that plug OEM for the MSM?
y8s is offline   Reply With Quote
Old 07-10-2008, 09:26 PM   #8
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,236
Total Cats: 288
Default

bringing this back up- what are you guys gapping the iridium plugs at? I ask because most of them for the MS come at .044, wondered if a bigger gap was possible because of the plug.
m2cupcar is offline   Reply With Quote
Old 07-10-2008, 09:39 PM   #9
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,846
Total Cats: 1,787
Default

id like the discussion we had about them on m.net but im lazy....just look in the turbo forum.
Braineack is offline   Reply With Quote
Old 07-10-2008, 09:42 PM   #10
Elite Member
iTrader: (24)
 
kotomile's Avatar
 
Join Date: Oct 2006
Location: Monterey, CA
Posts: 7,578
Total Cats: 40
Default

I have NGK Iridiums in the OTM, they missed under boost at the stock gap, gapped them to .030 and now it runs fine and no misses even at 15 psi.
kotomile is offline   Reply With Quote
Old 07-10-2008, 09:52 PM   #11
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

So is there any performance gain to be had with them? Im replacing my plugs this weekend and I was just gonna get stock plugs because they have worked fine with the stock gap.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 07-10-2008, 10:04 PM   #12
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,846
Total Cats: 1,787
Default

Braineack is offline   Reply With Quote
Old 07-10-2008, 10:53 PM   #13
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,293
Total Cats: 26
Default

F iridiums. For the price you can't beat the NGK V-power plugs. You can change them practically 4-5x for the price of one set of Iridiums.

Think of it this way.

Plugs have a range of effectiveness, over time they loose their ideal properties. Would you rather have a longer life and a longer lower effective range.... for a higher price? Or for a fraction of the price... refresh those plugs on a more regular basis.

Come on... changing plugs on a 4cyl takes like 5 minutes.

bkr7e 4 life
Splitime is offline   Reply With Quote
Old 07-10-2008, 10:56 PM   #14
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
this is why i stick with my NKRxEs
Is that a part # Scott? Did you mean BKR6ES?
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 07-10-2008, 11:14 PM   #15
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

iridiums will last the life of your car. I still stand by them.

the real deal here is that NO spark plug will offer any more power than any other spark plug if they're new.

the SLIGHT difference in the iridiums is that they have a very tiny center electrode. that means higher current density.

the major difference in spark plugs is life expectancy. copper is shortest, then platinum, then multi-electrode, then iridium.

so replace your coppers every 10k, your platinums every 30k, or your iridiums every 80k.
y8s is offline   Reply With Quote
Old 07-11-2008, 12:31 AM   #16
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,846
Total Cats: 1,787
Default

if i wasnt so cheap id try them buy hell ive replaced my plugs like twice....ever.
Braineack is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 PM
In need of AEM guidance W/pics E=MC^2 AEM 1 09-17-2015 01:34 PM
Obligatory "N00B" post! D_Breezy Meet and Greet 5 09-08-2015 06:37 PM
New here, saying hi, here's what I'm workin with. SuperSneakySecretSquirrel Meet and Greet 5 09-06-2015 09:30 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:05 PM.