I was wondering if its safe to run nitrous in cold temperatures? i know i will need a bottle warmer to keep a steady pressure built up but are there any issues i should know about to running it when its near freezing temps outside?

 

Other than cold tire traction, nope. However, if you tuned the car when it was blazing hot, you should re-tune it when it gets cold. Cold air is denser and will run leaner.

 

no, the nitrous pressure is lower when it's cold out. the car will run richer.