Got a new set of plugs to go in and was wondering what they should be gapped to? They are PFR7Bs and they're going in a 2002 STi. I'm assuming it's just a case of getting the feeler gauges out and tapping the end?

 

Any mods/upped boost from std.?

If so, general consensus is to gap at 0.65mm. (0.7mm if running std boost levels.)

Yeah, just put a bit of pressure on the outer "L"-shaped electrode by using a hard object e.g. the side of the feeler blades' housing. Do it very gently and carefully. It's correctly gapped when the blade slides in and out easily, but so that there's a very light drag to it too.

 

 

Aren't plugs pre-gapped!?

 

lol

I posted that without any 'irony' too. Your smiley had only just made me 'realise'...

 

No. They're usually in the ballpark, but that's no good... Even 0.05mm can make a 'big' difference!

 

Well I've checked them and had to adjust slightly. Better safe than sorry I guess. Thanks

 

its good to get them set right,as joz states they can make a real difference.

 

When I feel my 7's getting tired I gap em down .6, ive never had and it squeezes a bit more life from them. Gaz

 

Lol, hard to know sometimes where fact and bulls**t end on here

 

I would say they are raely gapped out of the box.