[955616846]

Yep... Order from the source to get the tailored base temperature pre-set. The standard base temperature is -29C and this is not user adjustable.

http://www.holtzmaneng.com/

If you want to know more about how it works search the US Patents, but it is basically just a pressure regulator for the bowl that reduces DeltaP (the only thing a carb knows about) between the bowl and venturi reducing fuel flow as temperature increases or atmospheric pressure decreases.