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Old 10-25-2004, 01:09 PM   #26
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Quote:
Originally Posted by Bankie
What material are the stock plugs?
Regular platinum.
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Old 10-27-2004, 09:05 PM   #27
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Old 10-28-2004, 11:38 PM   #28
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The above is for the USDM WRX EJ20
Any larger gap suggested is wrong for a turbo app. A slightly smaller gap(.026" - .028" ) is commonly used in 'colder' plugs because of increased boost and the slightly smaller gap helps reduce spark blow-out.

Below is the NA SOHC 2.5 FSM page....

Last edited by Uncle Scotty; 10-28-2004 at 11:43 PM.
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Old 10-30-2004, 12:22 AM   #29
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Thanks for the input guys!
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Old 10-30-2004, 12:53 AM   #30
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Any time, Ron.....all your contributions are worth their weight in gold
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Old 11-16-2004, 05:27 PM   #31
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I am going to be buying the autolite ap3922 plugs but i have one question first. Is double platinum worth the extra money? I know it is only like a dollar per plug but does it make a difference which route I take?
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Old 01-31-2005, 07:49 PM   #32
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Unabomber, would you please explain to me why my wife's Outback has to have plugs changed every 30,000 miles?
I can't get a straight answer from my Subaru dealer.
Any special tools needed to replace the plugs, looks pretty straightforward to me. Looks a heckuva lot easier than my old SuperBeetle, circa 1973!
Thanks for the help.
Keep it under 90, folks!
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Old 02-01-2005, 12:11 AM   #33
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I would guess they are a weak plat plug. By that I mean they have a thin, thin coat of platinum and won't last as long as the 60K "real platinum" plugs. My other hypothesis is that maybe the Outback provides a hotter spark than say a WRX, in that the coil packs on your car will burn through plugs faster. Your question raises the "chicken or the egg" question though:

You buy "100,000 mile plugs" for your Outback. Do you follow the spark plug recommendation or the SOA one? If the SOA recommendation is based on inferior plugs, you can use your "super plugs" for 100,000 miles. If the SOA recommendation is based on the greater spark energy theory, using your "super plugs" for 100,000 miles would lead to missfires and poor fuel economy.

We'll never know I suppose, so stick to 30K change interval.
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Old 02-01-2005, 07:22 PM   #34
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Quote:
Originally Posted by Unabomber
I would guess they are a weak plat plug. By that I mean they have a thin, thin coat of platinum and won't last as long as the 60K "real platinum" plugs. My other hypothesis is that maybe the Outback provides a hotter spark than say a WRX, in that the coil packs on your car will burn through plugs faster. Your question raises the "chicken or the egg" question though:

You buy "100,000 mile plugs" for your Outback. Do you follow the spark plug recommendation or the SOA one? If the SOA recommendation is based on inferior plugs, you can use your "super plugs" for 100,000 miles. If the SOA recommendation is based on the greater spark energy theory, using your "super plugs" for 100,000 miles would lead to missfires and poor fuel economy.

We'll never know I suppose, so stick to 30K change interval.
Unabomber, thanks for the comeback. I hadn't decided if I wanted to put "stock" plugs in, or something better.
I'll let you know, soon, what I will do!
Keep it under 90, folks!
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Old 03-31-2005, 04:33 PM   #35
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I'm looking at getting new plugs for my 02 WRX...

I was looking at the NKG Iridium Plugs. most places have a BKR6EIX and a BKR6EIX-11

what's the difference between the normal and the -11?

Also I currently have a turbo back and I'm planning on getting the Cobb stage 2 re-flash soon, would it be worth my while to get the plugs 1 step colder (only about a 40hp increase over stock) or is that something I shouldn't bother with until I go for something like a bigger turbo?

One last question. You talked about the differences of the conventional copper plugs but what are the differences between the platinum and the iridium plugs? I've heard people say platinum is bad for turbo cars but isn't that what the WRX comes with stock?
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Old 04-04-2005, 12:54 PM   #36
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Well done once again.


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Old 04-04-2005, 07:33 PM   #37
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Thanks.

twistedsymphony, one visit to NGK's website which is linked in the FAQ will answer all your questions as their FAQ section and their part number identification .pdf have the answers.
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Old 04-06-2005, 01:55 PM   #38
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i read the 2nd link with photos on the first page and it said to torque the plug down and then to torque down the electrode, is there a seperate piece that bolts to the plug somehow ?.....i dont pick my car up until the 8th so i havent got to look at it yet, im used to hondas where it takes .35 seconds to change spark plugs and maybe 2 days to pull the motor out rip it apart, rebuild it and put it back in, ha, i plan on changing all the fluids and plugs and installing my cel eliminator the day i get the car so looking for some info cause the suby seems to be a whole lot more difficult to work on compared to the simple b and d series hondas.......im still confused on a concept of a seperate electrode, so any help would be appreciated....
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Old 04-06-2005, 07:14 PM   #39
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There's no second electrode, Subaru plugs are just like Honda ones only harder to install. Set the gap, install, and torque them down.
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Old 04-10-2005, 05:45 PM   #40
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Are plug wires as important as the plugs? Wondering if any wires will do.
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Old 04-10-2005, 07:44 PM   #41
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You don't have wires are the 02 WRX is coil on plug.
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Old 04-10-2005, 09:41 PM   #42
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phantomsr is correct. There have been people have have custom made wires though. www.scoobymods.com has instructions, but it looks to be a super, super, super, pain in the booty that will net you zero HP and decrease reliability if you ask me.
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Old 04-11-2005, 12:10 PM   #43
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So all I need to do is replace my plugs, or is there something else I need to buy? All for my 60,000.
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Old 04-11-2005, 07:27 PM   #44
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http://www.subaru.com/owners/schedules/index.jsp is what you need to view for your 60k
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Old 05-05-2005, 03:46 AM   #45
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Here is the policy we stand by... Iridium spark plugs can have a larger gap w/ less voltage. You can regap themm in attempt to correct misfire or for optimal spark. Also a slide type gapper will damage an iridium tip.

Robert

Last edited by Unabomber; 05-05-2005 at 05:31 PM.
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Old 05-06-2005, 02:17 AM   #46
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Anyone know what's OEM for the EJ207? And what would be the correct colder plug?

I'm assuming its identical to the WRX but one step colder, but you never know...
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Old 05-10-2005, 01:23 PM   #47
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EJ207 plugs are the NGK PFR6G
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Old 05-10-2005, 08:38 PM   #48
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Quote:
Originally Posted by twistedsymphony
I'm looking at getting new plugs for my 02 WRX...

I was looking at the NKG Iridium Plugs. most places have a BKR6EIX and a BKR6EIX-11

what's the difference between the normal and the -11?

Also I currently have a turbo back and I'm planning on getting the Cobb stage 2 re-flash soon, would it be worth my while to get the plugs 1 step colder (only about a 40hp increase over stock) or is that something I shouldn't bother with until I go for something like a bigger turbo?

One last question. You talked about the differences of the conventional copper plugs but what are the differences between the platinum and the iridium plugs? I've heard people say platinum is bad for turbo cars but isn't that what the WRX comes with stock?

I read through the NGK FAQs and could not find the answers to the copper vs. platinum vs. iridium for the turbo WRX question. I was thinking about upgrading to iridium. What does the WRX come with stock?
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Old 05-11-2005, 04:00 PM   #49
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Quote:
Originally Posted by Samirr76
I read through the NGK FAQs and could not find the answers to the copper vs. platinum vs. iridium for the turbo WRX question. I was thinking about upgrading to iridium. What does the WRX come with stock?
Platinum.
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Old 05-20-2005, 11:15 PM   #50
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bump.
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