I got the BRE8ES spark plugs "copper"

What should I gap them at, mods r in sig, fp black ect.

 

i gap mines at 25

 

.022-.025" Basically as wide of a gap as you can get away with without misfires under high boost.

 

right on point.

 

You want to run the largest gap you can get away without misfiring or blowout. You can run on the smaller end of the gap range and be a little safer, you will just go through plugs more often. By going on the larger end of the gap range you will benefit by also improving your mpg. My setup is way different than yours and running less boost but when I switched out to a cop kit I was able to increase my sparkplug gap to .031" with no issues and improve my mpg by 30 miles a tank.
With that said, try gapping at .024" and go from there.

 

0.22 with no misfire at all, same plugs ..........@26 psi..

 

Have always been able to gap to .026 on my car. Never an issue

 

I run the tightest gap possible... .021, Denso, 1 Step Colder, E-85 & 38psi...

 

I'm at .019 tight like my girls stock ignition 31 psi.over 550 whp.

 

.022-.025