V6 Fi Vs 318

Humor me, take an appropriate wrench with you and head out into the country to some quiet section road. Advance the timing a tad and go drive a mile, floor it, cruise it, stand on it half way etc... Did it ping bad? If not, advance some more and try again. You should be able to get a fair bit more than the factory setting with decent gas. This is an age old technique called "timing by ear" and it may help you. (Down the road we can try "timing by stopwatch" to really dial in your dist).

Once your ignition timing is closer to optimal, try going down 4 numbers on the primaries.