i want install next week new spark plugs... i still have Original Plugs in, i want to upgrade to colder ones

now my quetion, which sparkplugs are really good... and which gap i need?

give it some good spark plugs where the gap not must been changed?

my performance mods: STI V2 Wagon with 3 inch Cat-Back, Mines Z4 Ecu, Apexi Intake, FMIC ... soon also catted 3" Downpipe

thanks

 

NGK PFR7G-11 is a good plug to use & you will need to set the gap at 0.7mm

Phil

 

give it some plugs what at factory comes with the correct gap?

 

Eh..?

Remember to check/re gap new plugs as they very rarely come correctly gaped..!

 

ahh understand okay.

so whats the best plugs?

 

We seem to be going round in Circles!!


Phil

 

Lol

How do PFR7G-11's differ from PFR7b's, which is what most seem to use..?

 

The the 7g is a later design series to the 7b.

Interestingly, some people on here seem to have had problems with bad running/missfiring when using the 7b & have ended up going back to the 6b.

We were recommended the 7g by Prodrive back in the mid ninetys, for use in modded road cars & have never had a problem with it.

Phil

 

Interesting..

Looking at some NGK info on EK9.org (EK9.org: sent wrong spark plugs!!?), the G-11s use a "fine wire nickle alloy centre electrode". The b's are listed as "special design", so who knows what that means..?

The 11 means it's a wide gap (1.1mm) plug with the 7b's ~0.65mm (standard gap).

Might give them a try next change..

 

is there also PFR7G-8's avaible? That it would be a 0,8 GAP... und the GAP dont must be change so much....

still confuse... which plugs i will order...

 

No you cannot get a PFR7G-8

You need to order a set of NGK PFR7G-11 & set the gap to 0.7mm

Phil