Hi I've recently installed a procharger on my 06 mustang GT and custom
tunned it using 'diablosport predator', the problem is that I have
detonations on third gear at high revolutions. I need to know what is
causing these detonations, the optimum settings and how to solve this
problem. On the manual there is nothing that tells me what the correct
setting for the 'spark advance' is, wether I should advance or retard
the spark timing. Generally what I want is the optimum settings for my
hometowns altitude wich is Guadalajara Mexico. The supercharger was
bought in phoenix AZ. and was installed by myself in Guadalajara.

Facts:
Location: Guadalajara
using 91 octane gas
supercharger brand: p1sc1 procharger
06 mustang GT manual transmission.
diablosport predator

I'd purchase an air/fuel meter from any online store and intsall it
per the instructions.  That will let you know if you have a lean
condition which will give you many of the symptons you're talking
about.  The engine ECU should retard your timing enough to keep from
it being the ignition.  Things to consider; innercooler or aftercooler
or even a methenol/water injection kit that can be found by doing a
Google search.  I am about to install a M90 Eaton on my 3.8 Ford and
already purchased the gauge.  It will tell you so much about your
engine that it's worth the money!