What plugs does the sti 7/8 Use as standard.

Is there anything better available as I have a service comming up soon.

Arron.

 

Standard plug is an NGK PFR 6B.
Found to be quite reliable, not really much of a problem, especially as they are about 12.00 each. Dont have to be changed normally for 30k,as they have platinum electrodes.
Option plugs are available, but not really looked into these as the standard ones are pricey enough for my own tastes.

 

You can run the next "colder" plug in the range, the PFR7B. This should cost pretty much the same and will run slightly cooler, so it is less likely to spark off detonation at high load. I have never had a problem with them fouling at idle/pottering about loads. Use the same plug gap with these. 0.7mm to 0.8mm IIRC.

 

Arron

Back up what MM says NGK 7's, this is indeed the same 'uprated STi plug' that is sold in Japan i am led to believe.


Iain

 

Thanks for the replies, what about HKS plugs have any of you used them.

Arron.

 

Arron
I used HKS S35i iridium plugs in my 99my (Link, 1.2bar, exhaust etc,etc.) and they were fine. The trouble is, you are looking down the barrel of 68 quid a set!
JohnD
PS I've just checked in the handbook for the latest models and it quotes NGK PFR6G for the turbo models. What's the difference between this and the PFR6B?

[Edited by JohnD - 8/18/2003 5:11:02 PM]

 

The new age WRX (including the STi7 and STi8) has the NGK PFR 6 G as standard. A usefull upgrade for powerfull cars is the PFR 7 G. You have to gap the plug to 0.7 mm. (be VERY carefull not to damage the platinum covered electrodes!)

I couldn´t find the difference between the B and the G, but I discovered that all Impreza turbo´s with 4 seperate ignition coils (MY95-MY96 and new age) do use the 6G. The other ones use the 6B. There will be a good reason for that!

I saw (and fitted) cars with all different kinds of plugs, but the best in my opinion is still the NGK. I use the 6 for cars until about 280 BHP and the 7 for more powerfull cars.

Mark.

 

I use coil on plug on my tweaked (non-scoobie) car. When I went from wasted spark coil pack and HT leads to coil on plug I had to change to a resistor plug for some reason. But that was an R on the end of the plug type rather than a B or a G.

 

NGK PFR7B came out of my bugeye MY00 JDM STI type RA as standard.

Have bought PFR8B for my next set.