Spark Plug Gap?

[svtcobrar2004]

I've done a search on trying to find out what to gap my plugs at.. i've been seeing .30 .32 does it really make a difference? i can't remember what i gapped them at when i got my car tuned with a 2.93.

Also, whats the difference in the copper and iriduim plugs.. and which is the better buy? i'm pretty sure i have the copper ones in mine. thanks.

 

[balboky01]

Most people run iridium plugs due to cooler plug temps and the fact that they last longer...there wont be too much of a difference between .32 and .30 gap....when i had my 2.76 upper only i ran a NGK TR6 gapped at .30 so anywhere from .30-.38 is fine

 

[svtcobrar2004]

ahh cool thanks man.. so i guess the copper plugs are just cheaper version?

 

[metaman]

Run the largest gap you can without causing spark blow out. I have been running .038 on a 2.8 upper with zero issues for a few years now. You could probably just set them there or even go to .040 if you wanted to.

 

[svtcobrar2004]

thanks for the advice man.