check out this -

http://www.youtube.com/watch?v=X4l5on3_IrA

i know its for a pug but its the same thing. done this on my mates mk2 mondy. works well.

if yours is just an n/a version, just do the max fueling screw. a STRONG 4mm allen key is needed. dont use a shit one coz if it snaps your fooked!