Here is a starter guide for tuning throttle response. This is just for throttle lag tuning ( no timing, fuel, ect...). Not saying this is the way or only way to do it, Just how I have. As always proceed at your own risk.
To start throttle tuning on the GPEC2 .
Go to Engine>Airflow>Electronic Throttle
Look at the power % request table.
Increase the first few lower voltage columns making it the same across the entire nvratio
Then from .5v on take the top # on each column and make it the same across the entire nvratio range
Then go to expected petal and make reverse of power% table with simple math
see below screen shots. I have stock tables and modified tables.
petal % stk.jpg
petal % modified.jpgpetal % modified.jpg
Then go to Engine> Airflow > electronic throttle > ramp rate and max it out.
ramp rate.jpg
Then go to engine > fuel > general
Disable WOT delay by maxing out vss mph and 0 tps volts.
Change WOT threshold to 2.7059
wot delay.jpg
Go to Engine > torque management > gereral
increase you min and max on torque adapts
disable esp tqmgt
I disabled trans tq mgt also on mine and well as zero out shift tq red, but i'm an auto trans tech so I might be more willing to take chances with this 8 speed then some are.
tq mang.jpg