Page 1 of 1

EJ207? PFR7G!

Posted: Thu Feb 06, 2014 3:52 pm
by entirelyturbo
Because I like you guys, and because, frankly, NASIOC can sit on it, I'm gonna let you all in on a little secret (and not NASIOC).

If you happen to have an EJ207 engine out of a JDM STi, and you've attempted to replace the spark plugs, you've noticed that the original plug is an NGK PFR7G platinum plug.

Well, if you've tried to get that exact same spark plug, you've undoubtedly come up short. If you go to your nearest friendly Subaru dealer with the OEM part number, 22401AA600, they... well... they're supposed to remain friendly and not tell you to sit on it, but they won't be able to order that part number for you.

Don't bother calling Advance Auto Parts, Autozone, Carquest, O'Reilly, or any of those places either. They'll be able to take that number and supercede it to an NGK BKR7EIX or a Denso IK22, which are both iridium plugs, but if you're picky to a fault (like me) and you don't want to use iridium plugs and would rather stick with the plug that came in the engine, this simply won't do.

Either that, or they will screw up and try to sell you the factory Honda S2000 spark plugs, which are PFR7G-11 and gapped too wide for a forced-induction engine.

You can even take NGK's stock number for these plugs, which is 4364, and search for it on NGK USA's PDF catalogue and you'll still come up short.

But wait... there's hope!

If you instead go to your nearest friendly Lotus dealer, and either ask for a set of spark plugs for an Exige (or simply give them the part number A128E6006F), you'll walk out with these!

Image

Since the Exige uses the Toyota 2ZZ engine, and it's also supercharged, it needs the 0.8mm-gapped PFR7G...

... and to the extent that I've researched, it's the only car to ever be sold in America that uses that plug from the factory.

Oh, and I'm also going to replace the PFR6Gs (which is what the EJ205 WRX uses) currently in the B4 with these, hoping the colder heat range will help alleviate the pinging I'm unfortunately still hearing occasionally under boost.

The catch? Yeah, there's a catch...

... Lotus knows that they're the only people in America who can get that plug, and if you don't want to pay them the $35.27 they want per plug, they too are going to tell you to sit on it :shock:

Re: EJ207? PFR7G!

Posted: Thu Feb 06, 2014 4:52 pm
by wtdash
Hi,
Why can't you just re-gap the -11? I've heard/read not to re-gap iridiums but the platinums? Is this due to your 'picky to a fault' claim?

I didn't find the PFR7G / 4364 on US Ebay or Amazon, but were avl. on Ebay UK for $65 (not £) plus $10 shipping for future reference. (Also from Germany, per the ebay results.)

TD

Re: EJ207? PFR7G!

Posted: Thu Feb 06, 2014 6:18 pm
by mike-tracy
I'll be dogone'd

Re: EJ207? PFR7G!

Posted: Thu Feb 06, 2014 8:53 pm
by James614
That's some good info.

How'd you come across their use in the Lotus?

EJ207? PFR7G!

Posted: Fri Feb 07, 2014 3:59 am
by entirelyturbo
wtdash wrote:Hi,
Why can't you just re-gap the -11? I've heard/read not to re-gap iridiums but the platinums? Is this due to your 'picky to a fault' claim?
Pretty much. I'm sure NGK is better at accurately gapping spark plugs than I am.
James614 wrote:How'd you come across their use in the Lotus?
Basically a shit-ton of Googling.

Apparently not enough, as I never saw anything about them being for sale on eBay UK or anything, but I imagine that those are probably listed as intended for the Exige as well.


Sent from my iPhone using Tapatalk

Re: EJ207? PFR7G!

Posted: Sat Feb 08, 2014 9:50 pm
by Legacy777
Good info Michael!

Thanks for sharing.

Re: EJ207? PFR7G!

Posted: Sun Feb 09, 2014 8:12 am
by mike-tracy
My ver 6 ej207 has pfr6g's in it. Straight off the boat, and from the looks of things, they're the originals. ;)

Re: EJ207? PFR7G!

Posted: Mon Feb 10, 2014 1:42 pm
by entirelyturbo
I did spark plugs and valve cover gaskets on a Ver 7 bugeye STi a couple weeks ago, and it had PFR7Gs in it, and from the looks of things, they were the originals ;)