[ichiro75]

Here's the verdict. 1% increase in Horsepower every 10 degree colder. :dance: You do the math. It makes quite a difference. Comparing 90-100 degree summer vs. the 10-20 degree winter.

http://blogs.sportcompactcarweb.com/1004173/editorials/cold-weather-horsepower/index.html

http://image.sportcompactcarweb.com/f/editorials/cold-weather-horsepower/1032071+w700+cr1+re0+ar1/dyno-pull.jpg