erm the 8v gti DIGI dosent work with a vac advance dizzy its just a pickup advance is applyed by the ecu.
would like piccys of the dizzy if it is vac advance type running on a digi ecu as thats a bit diffrent.
with a vernier to get the cam timeing spot on and maapable fuel and ignition you can get an 8 valve with a crazy cam to idel very smoothly takes a while tho and imo uses more map sites than its worth