JohnD

iTrader: (5)

The handbook states PFR6G which I know is the standard fitting for WRX, but does not differentiate between WRX and STi. Does the STi take this plug? As I have STi PPP I would have thought a 7G at least would have been a logical choice for safetys sake?
JohnD

TonyBurns

iTrader: (3)

My JDM handbook for my MY03 STi says 6's for the JDM wrx, 7's for the STi's.

Tony

EMS

In the Eurospec STi there are PFR 6 G fitted, so the same plug as the WRX. I doubt if you can get the PFR 7 G, my supplier told me the PFR 7 G is only available with a 1.1 mm gap (PFR 7 G -11). This gap is too big to be closed to 0.7 mm! I heard the PFR 7 B will do fine in an STi, I never tested though. (not yet!)

Mark.

TonyBurns

iTrader: (3)

The JDM STi run the PFR7G plugs, .7-.8mm

Tony

EMS

If that is true, I have to look for a different supplier!

Mark.

TonyBurns

iTrader: (3)

The only ones that dont run .7-.8mm are the NA cars.
Having gotten around some of the japanese (the NGK bit does give it away though )
This is what it says (MY03 JDM handbook).

1.5 PFR5B-11 NGK 1.0-1.1mm
2ltr NA KJ20SR11 1.0-1.1mm (no NGK on this one).
2ltr PFR6G (this is the JDM WRX) NGK .7-.8mm
STI PFR7G NGK .7-.8mm

Tony

Bob Rawle

PFR7B's work very well. Currently what I have in gapped to the usual 0.7mm. As std my plugs were 6G's, very sparkly.

bob

EMS

Bob,

With "sparkly" do you mean light detonation?

Mark.

JohnD

iTrader: (5)

Bob
As you're on, cost aside, what would you recommend - NGK platinim (PFR7B) or maybe HKS iridium (S35i?) I've used the latter item in a 99MY you Link'ed and mapped for me, and they were fine.
JohnD