your tune is probably a good part of it, i had a friend who had a plug colder on a motor and it didnt no what to do until he put the br7efs in, it was fine after. i have mine gapped to .30 which is what they are right out of the box. thats how most people i know run them

 

I agree the tune isn't perfect, but everything was fine with the TR6's, and by changing just the plugs it's now breaking up in boost. I imagine the timing and spray is too much for the cold plugs. Once I get my progressive meth controller installed I'll work on the tune and hopefully all will be well.

 

my 5.3 didn't like the 7's either. ran like pure crap with them in there. put the 6's back in and it ran like normal again.

 

My BR7s were in the .022" range out of the box. I opened them up to .032" and I am having problems breaking up in boost at 13 psi. Everything is fine at 11-12 psi. I'm going to get some new ones and throw them in out of the box or at .024"

Also, why are you running 10*? That's not safe, it's just stupid.

 

10* WOT timing is stupid low. I'd start with 17* and work my way up. Not enough timing plus too much meth is your problem.

 

25 rwhp roughly per 1lb of boost

rule of thumb is 1 degree of timing roughly per 1 lb of boost from a NA range. if your motor in NA form sees 28* of timing and you are at 13 psi then youre timing roughly will be around 15* and this is safe for pump gas now you can change this number some if your compression was changed or if you added in meth

but this rule of thumb is proven over and over again and works well if basically all you did was add boost

 

IMO your not running enough boost to even have them plugs... Go back to stock. You guys not running any boost and swapping all these plugs make me laugh. Seriously

 

Stock plugs with 13psi ?? Really??

 

I have ran the br7ef on 10-11 psi without any meth, gapped .030, 20* of timing, IAT in the 120-130 range and never had a problem. i Think its all in the tune. your meth injection amount may be to much for that low of psi.

 

Did anything ever some of this? I will be tuning for meth tonight with BR7's in my truck at the moment and this wont be the first time I have heard of some issues with the 7's and meth.