suzsub, nice to see you in here
If you looking at WI you have many to choose from.
I'm using the Aquamist 1s basic system.
I inject water at 12psi with full boost at 16psi
Water injection depends on setup will lower your EGT you can also increase your timing when you run water injection
But FYI before i turbo'd my G13B i was running 11degrees timng which is 3 degrees over the stock 8 degrees timing at idle.
if you want to speak further you can add me to yahoo or hotmail
h_gdon@yahoo.com
hgdon@hotmail.com