Best to go small increments. Add 1 deg and take it for a spin and look for kr. Its common to run 1-2 deg of extra timing and 1 pully smaller when you switch to alky. Thats why it just rocks for L67. I know when bilal put this on his gtp he picked up .4 tenths. Running alky is also what helped me get my daytona very deep into the 12's . If i tune it better i think i can get a 11.9 out of it. Remember i don't have a cam /head work either.
Shawn i really feel these motors tend to run best with 50/50 mix. I have ran this and seen many other meth injected grand prix that make more power this way. I even seen bilal ditch his zzp intercooler for the meth and he made more power.