I'm asking this because we have had -40 Celsius with the wind chill all week (it's finally gone back to the -20's and my car started every morning although it was so cold some of the vents started snapping once the car started. So I'm curious to know how would turbo's hold up to -30 to -45 celcius? I plan on doing a swap come spring time and the car will be a DD'd through winter and I don't want to risk breaking anything expensive.

It's fun to know that my family have all had problems starting their cars during the winter and all have block heaters while mine starts first try every time without it.

 

turbos love cold air

 

I know they love cold air, but I'm speaking more along the lines of starting the car at that temperature, can the components withstand being outside over night in -30 to -40 without causing problems when starting and running?

 

why wouldnt it? your N/A does right? just dont get into boost until its warmed up

 

If you have a healthy turbo engine with good compression, and leave all the idle control components on you should be fine. I would be paranoid running the stock ecu with bolt ons and higher than stock boost, as the colder the air, the more fuel is needed, so I'd either keep it all stock, or have some sort of tuneable engine management...
N/a's are nice, you just start it and go, and don't have to worry much. A modified turbo is going to be more finicky in cold weather.

I started mine up to let it run a bit in storage the other day, around 0*F, and it started right up without issue.

 

When the boost comes on, you'll have trouble keeping traction on that polar ice cap...