hah you didnt read that piece or paper that came with the jet kit did you ?
the toomey kit if for close to sea level at around 60f with the snorkel off, lid on and with the 12 1" filtered holes through out the box and lid.
"The #270 Jet is for operation higher than 2500 feet in altitude. The 280 is the sea level setting up through 2500 feet. On particularly cold days or at very low altitudes (winter in Glamis, CA) you may need a #290 or #300. Conversly, at high alitudes, above 3000 feet you may need a 260, 250 or even less depending on how high you are and how hot it is. We haven't tested at these altitudes, so any recomendation from me would just be a guess. You would do far better to test it yourself when you are there."
if you remove the lid all together, you will need to jet up.
i run no lid with heaps of holes in my air box and i smash through water. (not knee deep puddles haha )
difference between a vette and a shee, is that ill ride the banshee out, the vette stays in