ikes wrx

I've got a cobb AP stage 2 set up, should I be using a colder plug range than stock?
Also the car sees cold weather here in Canada

sigma pi

iTrader: (6)

the heat range has nothign to do with the temp outside almost

the heat range is the temp in the cyl.

some people say it helps out with detonation

testes1010

many people have ran into misfire issues w/ the OTS Cobb Maps, because they are not designed for colder plugs.....otherwise I'd recommed colder plugs for an aggressive custom STG2 tune...

ikes wrx

thanks for the info, I have a p0304 code going on right now, I just thought that colder plugs might help solve this

testes1010

check your #4 plug & coil pack....

ikes wrx

I've done that thanks, I've posted my woes in another thread "cel p0304"
I was just wondering about the plugs

johsti

iTrader: (2)

True, but it can affect cold starts. You might have to turn the key a couple times when it's cold out. Once the engine is running, the plugs won't be affected by weather.

I'd recommend one step colder coppers. that's what I'm using on a tuned stage 2. They're cheap and work great. I've had the stock platinums, colder iridiums and now one step colder coppers, and there is no noticeable difference. If anything, the car seems to idle and drive smoother with the coppers. NGK/Copper/BKR7E/WRX/one step colder. the only downside to the copper plugs is they need to be changed about once a year.

ikes wrx

thanks for the straight up answer,