Adjusting the timing?
-Garrett
No point in half-***'in the tune, use a dyno AND portable wideband if you really want it on the dot.
This is what your friends are for. If you are in atlanta, i have two portable widebands (one ntk, one lm-1 innovative with rpm induction), that i'd let friends borrow any time (friends being any non-a hole ls1 or vw owner). lol.





