What he said. While a projected electrode is less prone to fouling it is more likely to produce preignition.

 

You're fine, no hurrying needed. If it runs fine and doesn't misfire when you are on high octane maps, then no need to worry. I went one range colder only because I was like a sheep being herded. But when you are making 125 hp more than stock it seems like a prudent thing to do. For anyone with a big turbo upgrade, it is probably mandatory to fight against misfire.

 

mine seems to run fine with the stock plugs, im just anxious to see how bad they look though.

 

seems to run fine. sometimes i get a little hiccup on the race map around 6500-7000 rpm. maybe that is a misfire? I'm not sure.

why would going colder stop misfire?

what negative effect would a colder plug have?

can you ultimately tune a car to make more power on a colder plug?

are you using the bPr8es or the bR8es?

Thanks for your tie in answering these questions!

scott

 

well i checked most of the 8 plugs I bought, and on my little round gap measure tool, they all seem to stop on the round gap thing at around .029-.030 When checking the gap with one of those tapered round measurers, do you slide the plug around til it stops, and then whatever the middle of the electrode lines up with is what it is gapped at? or is it just when it begins to touch the metal.

 

pick up something like this, I found one at NAPA and it has made life easier http://www.handsontools.com/store-pr...%3E_25650.html

 

i had thought about a feeler gauge, but felt like it wasnt needed. Im just going to be checking my spark plugs at the moment, not doing a valve job or anything like that. The round little tapered disc seem to work fine as far as I know. Correct?

 

I never felt comfortable using the little round gauge to get an accurate reading, but I'm sure they're ok as many people use them.

 

I'm tired sooooo, I suggest you use the search button.

 

Agreed...I recommend using feeler gauges to gap plugs

 

well, installed the BR8ES tonight, gapped them down to .024-.025ish, so far i really cant tell any difference if it helped anything or made anything worse, but i cant say i drove for more than 5 mins either. My stock plugs actually didnt look too bad, but seemed to be alittle more whiteish than a brown/tan color.

 

Yep...they always are, the very reason for installing the colder plugs...My 2c

 

What are the stock evo plugs gapped at from the factory?? Is. .024 The biggest gap we can run before generally seeing spark blowout? seems like a pretty small gap.

 

i believe 0.028