just a question becasue im missing something here
but i have a 2003/2004/2006 all 5.3
so wtf are the timing tables( high /low) octane off so much.
I'm talking like 20^
just working on my 06 till i get headers on it nex to hook up wideband,,
but wanted to try to squeeze as much out of it as priactical for time being..
and niticed the timing charts are all over the place different,,
can atatach file sif anyone interested,
Cheers