Hi, i need your advice about this spark plug.

I set base timming on dizzy and Crome at 16° and 18° total at 11psi, i believe they are conservative numbers, but my spark plugs says i have an advanced timming mark.

My setup:
ZC with P2P pistons and double headgasket (around 8:1 cr)
Spark plugs gap .018
16:1 AFR at idle and cruise and 11 at WOT
11-12 psi

 

Which kind of spark plugs are you running? BKR7?

 

Those are bkr6e but have same color on new set of 7s

 

I retard distributor timing and re tune afr but still have same color

 

look at the burn threshold on the ground strap, it's too low.
and the top of the ground strap is ashy.
you need one step colder plug.

 

also that's way too small of a gap for 11psi, start at .028 and only reduce if you get blowout.
PS never tune a boosted Honda on crome, it's absolute garbage.

 

Im going to re gap to .028 and see what happens from there. I use that way small gap because on previous turbo (borg warner .70) car bogs at high rpm till i close gap to .018 problem gone, but let me check with actual garrett .60 and .028 gap.