as a rule of thumb you can lean it way out under decel, want 14-15 while cruising, and 12:5 under accel
do not go into boost with it at 14:1 or you will melt things you want to be in the 12's under boost
here is an example of a turbo spark map, anything over 100kpa is under boost
ALSo there should be between 0.7 degrees and 1.3 degrees of spark retard per psi of boost on pump gas.
Modified by chrisbmx68 at 11:30 AM 8-6-2008