ok on a 1g you cann't do alot but you can mess with the MAS by pulling out i think both honeycombs... hack up the air box or replace it with a K&N... after that it takes money.
if i were you i would seriously take a look at machv.com they have a performance guide that really helps. and they have a board as well. by the way most of those guys on the board have a 1g as well!
later
"Z"