What spark plugs are everyone using? - Subaru Enthusiasts Car Club of the Sierras

ryan4601 · 2007-10-16, 12:22 AM

More specifically STI drivers. It seems that my plugs are fouled after less than 10k of driving. I think my idle is rich so that is a problem. Anyway i ordered a set of Denso Iridium plugs (IKH22). Im just wondering what everyone else is using. thanks for the input.
ryan

sperry · 2007-10-16, 06:31 AM

As far as I know, there is one and only one choice for colder STi plugs: NGK LFR-7AIX. And when I say "one and only one" I don't mean that 'cause they're great plugs, I say that because they're the *only* one step colder plugs for the STi, period.

Personally, I'd rather run a set of $4 copper plugs and change 'em frequently, but they just don't make 'em for the STi heads.

Dean · 2007-10-16, 07:11 AM

Quote:

Originally Posted by sperry

As far as I know, there is one and only one choice for colder STi plugs: NGK LFR-7AIX. And when I say "one and only one" I don't mean that 'cause they're great plugs, I say that because they're the *only* one step colder plugs for the STi, period.

Personally, I'd rather run a set of $4 copper plugs and change 'em frequently, but they just don't make 'em for the STi heads.

I have to check, but I believe that is what I'm running.

I think there are other options out there, but nobody who tunes these cars will touch anything else.

And I am very happy not having to go to the trouble of checking/changing them often.

Double Phister · 2007-10-16, 07:20 AM

I'm also using the one step colder NGKs.

MikeK · 2007-10-16, 08:28 AM

Still on the stock plugs here

cody · 2007-10-16, 08:52 AM

One step colder Denso Irridiums on my WRX.

Dean · 2007-10-16, 11:51 AM

Quote:

Originally Posted by MikeK

Still on the stock plugs here

Really? With the green???

MikeK · 2007-10-16, 12:01 PM

Really? You don't believe me???

Dean · 2007-10-16, 12:07 PM

Quote:

Originally Posted by MikeK

Really? You don't believe me???

I believe you, just surprised between all your stages, nobody ever suggested or swapped plugs on you. Especially whoever did your green upgrade.

MikeK · 2007-10-16, 12:14 PM

Quote:

Originally Posted by Dean

I believe you, just surprised between all your stages, nobody ever suggested or swapped plugs on you. Especially whoever did your green upgrade.

Everytime I make a change to the car I ask Mike if I am missing anything and he has never mentioned plugs once.

cody · 2007-10-16, 12:26 PM

WTF M8?

sperry · 2007-10-16, 01:10 PM

Colder plugs don't make a difference in power or anything. If it's not pinging, it's not pinging... no need to pull heat out of the chamber if you aren't having an issue.

Kevin M · 2007-10-16, 01:18 PM

Plus colder plugs foul easier, so on a street car they are not really a help.

cody · 2007-10-16, 01:59 PM

Colder plugs can allow your tuner to milk a couple more ponies out of the tune though. They do foul if you drive like a Granny all the time though. A good full throttle pull every once in a while cleans 'em off though.

They're generally recommended for anything stage2 or higher, assuming a custom tune.

MikeK · 2007-10-16, 02:42 PM

I mainly use my car to get milk and bread from the quick-e-mart so I should stick to stock plugs

Dean · 2007-10-16, 03:00 PM

Quote:

Originally Posted by MikeK

I mainly use my car to get milk and bread from the quick-e-mart so I should stick to stock plugs

Don't forget getting smacked down all season long in autocross by an old man in a turbocharged walker. You can blame that on your plugs too.

MikeK · 2007-10-16, 03:15 PM

Quote:

Originally Posted by Dean

Don't forget getting smacked down all season long in autocross by an old man in a turbocharged walker. You can blame that on your plugs too.

I'm glad I don't have colder plugs, or I would have beaten you by 0.002 instead of 0.001 at event 5. I hate putting unnecessary wear and tear on the car!

MattR · 2007-10-16, 03:54 PM

I'm on Stock plugs ftmfw!

Dean · 2007-10-16, 04:01 PM

Quote:

Originally Posted by MattR

I'm on Stock plugs ftmfw!

FTMFW of what? 3rd in BSP?

sperry · 2007-10-16, 04:18 PM

Quote:

Originally Posted by Dean

FTMFW of what? 3rd in BSP?

It's better than being on colder plugs that are sitting in a bucket 'cause the motor's in pieces.

MPREZIV · 2007-10-16, 05:39 PM

Quote:

Originally Posted by Dean

FTMFW of what? 3rd in BSP?

HEY! There's nothing wrong with third place!

sperry · 2007-10-16, 05:49 PM

Quote:

Originally Posted by MPREZIV

HEY! There's nothing wrong with third place!

It all depends on who's 1st and 2nd... if it's two national champs like in Matt's case, you're right. But when it's just Dean and Mike... pshht... you should be ashamed!

MPREZIV · 2007-10-16, 05:51 PM

Quote:

Originally Posted by sperry

It all depends on who's 1st and 2nd... if it's two national champs like in Matt's case, you're right. But when it's just Dean and Mike... pshht... you should be ashamed!

Yeah? Well... Umm... I don't have a comeback... That's mean dude. 'Least MY car still runs!

Dean · 2007-10-16, 06:11 PM

SNAP!

sperry · 2007-10-16, 06:25 PM

Quote:

Originally Posted by MPREZIV

Yeah? Well... Umm... I don't have a comeback... That's mean dude. 'Least MY car still runs!

but... but... there was a little winky guy ->

Plus, anytime you're within a second of cars with 100+ hp on you, *they* should be embarrassed.

2007-10-16, 12:22 AM	#1
ryan4601 EJ22 Join Date: Feb 2004 Posts: 244 Car: 2004 wrx	What spark plugs are everyone using? More specifically STI drivers. It seems that my plugs are fouled after less than 10k of driving. I think my idle is rich so that is a problem. Anyway i ordered a set of Denso Iridium plugs (IKH22). Im just wondering what everyone else is using. thanks for the input. ryan

2007-10-16, 06:31 AM	#2
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	As far as I know, there is one and only one choice for colder STi plugs: NGK LFR-7AIX. And when I say "one and only one" I don't mean that 'cause they're great plugs, I say that because they're the only one step colder plugs for the STi, period. Personally, I'd rather run a set of $4 copper plugs and change 'em frequently, but they just don't make 'em for the STi heads. __________________ Is you is, or is you ain't, my con-stit-u-ints?

2007-10-16, 07:20 AM	#4
Double Phister EJ22 Join Date: Mar 2005 Location: Elk Grove, CA Posts: 450 Car: 2005 WRX STi "I'm sideways and in control... I look good."	I'm also using the one step colder NGKs. __________________ Dan - '05 Black WRX STi. My Mods

2007-10-16, 08:52 AM	#6
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	One step colder Denso Irridiums on my WRX. __________________ Slow and low, that is the tempo.

2007-10-16, 12:26 PM	#11
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	WTF M8? __________________ Slow and low, that is the tempo.

2007-10-16, 08:28 AM	#5
MikeK Captain Turbo Join Date: Feb 2004 Location: Reno Posts: 3,318 Car: 05 STi	Still on the stock plugs here

2007-10-16, 12:01 PM	#8
MikeK Captain Turbo Join Date: Feb 2004 Location: Reno Posts: 3,318 Car: 05 STi	Really? You don't believe me???

2007-10-16, 01:10 PM	#12
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	Colder plugs don't make a difference in power or anything. If it's not pinging, it's not pinging... no need to pull heat out of the chamber if you aren't having an issue. __________________ Is you is, or is you ain't, my con-stit-u-ints?

2007-10-16, 01:18 PM	#13
Kevin M EJ22T Join Date: Sep 2003 Location: Reno Posts: 9,445 Car: '93/'01 GF6, mostly red Class: 19 FP	Plus colder plugs foul easier, so on a street car they are not really a help. __________________ FWD is the new AWD

2007-10-16, 01:59 PM	#14
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Colder plugs can allow your tuner to milk a couple more ponies out of the tune though. They do foul if you drive like a Granny all the time though. A good full throttle pull every once in a while cleans 'em off though. They're generally recommended for anything stage2 or higher, assuming a custom tune. __________________ Slow and low, that is the tempo.

2007-10-16, 02:42 PM	#15
MikeK Captain Turbo Join Date: Feb 2004 Location: Reno Posts: 3,318 Car: 05 STi	I mainly use my car to get milk and bread from the quick-e-mart so I should stick to stock plugs

2007-10-16, 03:54 PM	#18
MattR El Matador Real Name: Matt Join Date: Dec 2002 Location: Reno, NV Posts: 10,660 Car: 2012 Toyota Tacoma Class: ?	I'm on Stock plugs ftmfw! __________________ "Dallas..We have a problem.”

2007-10-16, 06:11 PM	#24
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	SNAP! __________________ I am a Commodore PET --- Now get off my lawn you kids...

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