I hope you can get that to work, I definately understand it being a huge variable as like you said. vents/snow... etc. but i think it would just be some interesting info to say the least.
and header wrap will keep the temp in the pipe like you wont beleive!! on my 4 banger setup the header will be red hot where you can see it, but when you shut it off you can touch the wrap and not leave a burn.. obviously its hot as $hit, but not gonna melt your fingertip off!
also, just a thought for those who route the tube out the top... you want a LOT of surface area, its amazing how fast snow can stick to the tube, also, try to get the intake part as far away from the console area as possible if going up out the side, i find mine when i carve right the snow slides up the hood and wedges between the filter and the console area... its 4-6" away, but it sorta funnels the snow in and sticks it to the turbo... im working on a setup to run it out behind the windshield like the alpine yamaha's!