wrx davs

Hi Guys and Gals

I have a MY93 WRX and want to change spark plugs and want to know if any of you know the gap settings ???

Thanks

RedScoob

I think it's 0.6mm to 0.7mm depending on boost. Someone will be along to clarify, I'm sure...

wrx davs

Am running 1.3 bar if that helps

RedScoob

I'd guess 0.6mm

daves2rs

0.6mm PFR7B at that boost level.

0.7mm and expect a slight hesitation on boost

apalmer

iTrader: (8)

Be careful with PFR7B's i had nightmare misfire issues with those when they were gapped at .6 .65 or .7 turned out later i was not alone on this. Apprently PFR7G's are far better??? Subaru sell PFR6B's off the shelf but can order the 7's if needed. In the end i put my NGK Iridiums back in misfire = gone

running .7 gap with 1.4 BAR

@d

PeeVee

iTrader: (1)

Yup, I agree... Run a set of PFR7G-11 & gap them to 0.7mm & they will be fine.

Phil

daves2rs

PFR7B Gapped @ .6mm no problems @ 1.4bar

David

PeeVee

iTrader: (1)

Your car was originally built using the "G" range of plug, only Std UK cars run a "B" series, the reason you have to close your gap down from the factory setting of 0.7mm to 0.6mm is that the plug is struggling to cope with the demand you are placing on it, if you fit the "G" series next time you change plugs you will find that it copes much better and it will eliminate the tendency to hesitate on boost at the correct plug gap.

daves2rs

Yip I hear your facts but I only had access to PFR7B's prior to my map. Gapped to 0.6mm and not had a problem on boost. Purely stating my evidence....