PFR6g STD plug for 2001-2002 ej207...It's not an NGK racing plug.


Pfr6b STD plug for 1996-2000 ej20*

In both of those ^^ part numbers the 'B' & 'G' both signify 'Special design'...They are 2.5mm shorter than standard plugs & hence special.


R7433- (8-10 heat range) - It's a nickel/ Iridium plug.



Firing end construction



Info here: http://www.ngk-sparkplugs.jp/english.../02/index.html


Read the GREY part number scheme for deciphering PFRXXX - Ngk's 2nd phase Numbering system



In this chart you'll see G & GV listed as racing design firing end for the old NGK part numbering scheme.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

no but the g plug has the racing electrode. i am looking at the sti plugs though which are the r7433 or the STI T7359-8. That is the acutal part number of the plug. I am trying to work out what the difference between them and pfr6g is, apart from the heat range.

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Version 6 STI

Im with Joe. 7's for me due to elevated boost levels. Then no dramas. 6's would be fine for more normalish, 'less modified' cars.

Brent.

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* [REXPLOIT] - EJ207 2.2L build. Under assembly:
* All Sling - No Bling: Member 002:
* WRX Club of WA member / CAMS member / CAMS registered volunteer:

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NGK R7433- *

[B]Center electrode = Iridium
Ground = Nickel Alloy

PFR6G

Center electrode = Platinum
Ground = Nickel palladium


PFR6B

Centre electrode = Platinum
Ground = Platinum chip


As requested, above is the only differences between all 3 of the plugs you wanted to know about it's all in the firing end materials used....I can't lay it out any simpler than that.

You pay $40 per plug for the R7xxx-x plugs because they are a group 3 low volume seller, simple as that.

As an NGK wholesaler I sell around 1000 ngk plugs a week,I can categorically tell you that NEITHER the PFR*B nor PFR*G plugs are RACING plugs....Period. There are no Platinum Racing plugs.

They are both long life Platinum plugs (60,000km intervals on stock turbo engines /100,000 on N/a's).

FFS Honda civics run the same plugs!!!....VTEC YO!!!

PFR6G


(The blue R on the body designates the plug as a resistor type)


Single platinum center electrode ^^ NOT a racing plug!!!



PFR6B (note the platinum chip on the ground electrode, as well as the center):







Here's some NGK racing plugs:

B9EGV = Gold Palladium fine center electrode


B9EG = fine wire nickel center electrode



G & GV plugs are supplied in RED NGK Racing boxes....Ask any Rotary enthusiast.

The other racing plugs are Ngk Iriway part numbers are IRXXX or $220 special application plugs.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

How much for a set of my bugeye plugs Ross?

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

I can do them for about $16.50 per plug....List is $26

*Should* have them on the shelf.....unless dealer did a stock order on Friday.

I'll do another GB for supporters in the next few weeks.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

lol @ balistc angry essay.

good info though

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MY93 Impreza GX 1.8L, 0hp, 0nm

Koolio, I'll wait for the GB then.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

Thanks for that info. I have also found out that the materials used in the ceramic insulator are also different aswell, so sounds like they are worth the extra $$

Now i know you are saying that the pfr6g are not a racing plug but my catalouge at work says that they have a racing ground electrode. Im sure yours does too.

Anyway i think that i will see if i can source the ngk R7433 plugs, if not i will just get the set off subaru.

Cheers

Tom

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Version 6 STI

So what's the difference between running cheap $5 plugs, platinum's or iridium's of the same heat range?
This may be of interest, all about plugs.
http://www.carwale.com/Research/Know...parkPlugs.aspx

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
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