exactly what do plugs look like with detonation

[acannell]

2.5 turbo I
14 psi
big intercooler
stage 3 fwd performance computer

what should my spark plugs look like with

NO detonation
MILD (almost acceptable) detonation
MODERATE (i.e. damage occuring, fix now or die) detonation

my plugs look all the same pretty much

EGT gauge on cylinder #4 indicates up to 1500F under WOT

a little bit light (not that dark tan that the spark plug chart shows as normal)

i'll try to take pictures

[speeduphoria]

dude did you try some better gas yet?

[acannell]

not yet. id still like to be able to read the spark plugs correctly. for all i know there is no detonation and the computer is responding to something else.