okay so i have a 2005 sti.
perrin front mount and garret gt30. i dont want go into mod list.
but anyways. i was wonderiing if any one could give me some advice. i live in reno nv, and im moving to scottsdale az. thats 2 completely different climates hahaha onces cold ones really HOTTT

i know im going to need a tune...but i dont have the money yet to re tune my car for the climate.
any ideas of what i should do to my car to insure it running awesome since its always going to be like 100 degrees ....when moving down there? i heard i should go with a thinner oil. what else could i do!? different coolant!? is there anything i can do!?
now another question. i have a kenwood dvd screen and an amp and speakers and subs in my car. i think its draining power from my battery and amp. because when i plug in my radar detector sometimes it will read LOW VOLT. i was wondering if anyone knows if i can take my car to a shop and have them UP THE WATTS on my ALTERNATOR. or where i can buy a bigger alternator to fix this problem. thanks = ]