When's a colder plug required??

[Hy_Dro]

Been asking around since im going with a RR 2.8 shortly. Been told that regapping the stock plugs will be fine with these mods:

X-pipe/Cat-back
RR 2.8/tune
Idler
Cold air

What do you all think??

 

[mystic1]

Before I switched to my Deneso plugs I was running the stock plug and gap without any problems. But then again some peoples car will miss and run like crap. Since I have had the new plugs the car seems to run better and is a lot smoother. I'm running I22's @.39 gap.

 

[Shadowgray03]

Densoi recommends going one step colder for each 75-100hp increase over stock.

The problem is the cobra's came with 3 different heat range plugs.

 

[Snake-Shadow]

I find this chart from Accufab to be very helpful.

M@