Interesting. I still think it would be a better idea to put a leaf blower on, however. And I just love how they contradict what they said on a previous page. "Every 40* colder nets a 6% increase in HP" = WRONG!! Every 10* colder nets a 1% increase in HP, so you'd need a temperature drop of 60* for a 6% increase in HP. At least they could get their facts straight! 