Advanced timing is when you change the timing of the spark pattern; you can do this on drivers by taking out the dizzy and rotating it to the correct degree. When the VWs come off the assembly line they are set to a ?safe? limit. I advanced the timing until it started ?pinking? then wound it back a bit until all was good. My description is a bit vague, you really need someone to show you how, but it?s quite simple.
The operator was really shocked and said if I put a full stainless system on it and tweaked the fueling a bit ill be very close to GTI standards