Alright guys my blocks machined, my crank is here, my rods & pistons are ready to drop in. Now since I'm here I figured I should just do a cam, but I'm worried if it will run on 91oct. Its a HIGH compression 4.2L, ported head, .038 quench.
I have almost 8.5 DCR and i only have a slight ping at sea level running premium. I live at about 3500ft though so this is rarely an issue and its nothing Octane Booster doesnt solve.
Every engine is different though.. and with your tighter than tight quench and lower DCR, i am willing to say that you should be OK.
Ok cool..I'm at sea level, it'll be tuned via a SAFC II..also have polished combustion chambers, and am looking at how to polish my top of the pistons tops before it goes together..
