So i am swapping to some 7s today, i am running about 14-15psi right now so i figured it was time.

So my question on setting the gap. Is a good rule of thumb to set it wide and work myself down? Meaning should i run the widest gap without blowout?

 

.028 is where id set it...

 

.028 here with 7´s but only on 10-11 psi and works great

 

I personally keep the gap as wide as i can without blowout..028" up to 22 psi no problem. At 15 psi you could probably open it up even more

 

I had mine at .028 and blow out was horrible in a lot of conditions...

Are you all talking BR7 when you refer to 7 heat range plugs or other?

I know we talked about this in the past but maybe meth had something to do with my blow out issues as opposed to others running e85.

 

Yeah that is what i was wanting to know. Start out wide the decrease if it blows out

 

I have a set of BR7s and TR7ixs.

 

Br7ef



Blowout can occur if charge is too cold for fuel used...meth or e85 act similar...they require some heat in cylinders to properly ignite

 

Stock heads and non protruded plugs also recess the plug a decent amount.

 

So what are the advantages of a non-projected plug.