Hi, I am replacing the coil packs and spark plugs on my 95 sti-ra and am fitting some NGK platinum plugs and have gone up a grade from a 6 to a 7. what is the recommended gap so i can check em before i fit em??
cheers mark

 

0.7mm

 

they should be set at .7mm out of the box but it is a good idea to check em before fitting

 

Hi, thanks for that, but i have just purchased a genuine subaru worshop manual on cd today and this states that they should be 0.95-1.0mm??????? so that is what i set them too earlier and have just finished putting everything back together and shut the bonnet.
typical....................

 

Sorry mate, it's defo .7mm.

 

is it a manual for uk cars or JDM and for what year???

 

Sounds like sport plug gaps to me.

R.

 

as above .7 is the one.......................

alyn

 

oh well, I will just have to do the job again tomorrow, at least i wont have to replace the coil packs aswell..............
Thanks again, better to find out now.
Mark

 

How did you get on? I just changed my plugs on my sti4. The plugs which I removed were PFR6B's, and had plug gaps ranging from 1.00mm - 1.4 mm! Can't believe the engine actually fired!
Got PFR7B's set at 0.7mm in there now and boy, what a difference. Fires up more readily than before and, I don't know if i'm imagining it but seems to pull better aswell, as if i've gained some torque!

Oh, and the old knock link is quieter aswell.

Goes to show what a difference a set of descent plugs that are set right, can make.