spark plugs??
Hi,
If your car doesn't misfire nor it fouls the stock plugs, there isn't much to be gained from going one step colder. BPR7ES is a good alternative to stock plugs. Or BPR8ES and progressively gap them down to 0.022" if you feel a misfire at high boost/rpm (they come at 0.028"). If you have deeper pockets: Denso IW22's are a similar heat range. IW24's for higher boost. I'm using IW27's and a couple of hours of stop and go traffic is enough to foul them.
If your car doesn't misfire nor it fouls the stock plugs, there isn't much to be gained from going one step colder. BPR7ES is a good alternative to stock plugs. Or BPR8ES and progressively gap them down to 0.022" if you feel a misfire at high boost/rpm (they come at 0.028"). If you have deeper pockets: Denso IW22's are a similar heat range. IW24's for higher boost. I'm using IW27's and a couple of hours of stop and go traffic is enough to foul them.
Is the car misfiring everytime it hits high rpm's? If so, wait until it cools and change the plugs first. Go to Pep boys and get some BPR7ES's and if possible gap them down to 0.022" if you're running high boost all the time.


