How I got an extra 25 miles for basically free

[tmontague]

Originally Posted by soldout

So you guys are shitting on this theory? Im not saying to go out and buy cans of Summer air but maybe try this for yourself and see if it makes a difference. It wont cost you anything but maybe 20 minutes of you time. Theres a reason why hot air ballons float into the sky.

http://www.weatherdudes.com/facts_di...php?fact_id=51

Originally Posted by soldout

I understand that but what about the temperature of the initial fill of the tire. The cooler air is denser/more packed together and would take more of it to fill the same amount of space. The warmer air is less dense and would be able to fill the same amount of space requiring less of it. Once the air is in the tire it will expand or contract depending on the ambient temperature or tire temperature. Is this correct or a load of BS.

Originally Posted by IllusionX

Density will change inside the tire as air temp changes. That's why you tire pressure is greater when it's hot outside, and would "deflate" itself when ambient temp drops.
Not when you fill up

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I still am not sure if the OP is really trying to stretch an April fools joke out into the end of April or if he is seriously contemplating efficacy of this

What IllusionX stated is true. Yes, air that is warmer increases pressure and is less dense but only so in a closed system. Aviation deals with this due to the atmosphere being an open system. Care tires are sealed and therefore a closed system so density becomes dependant on pressure. Temp and density is a moot point, pressure is what matters and what you change as it is dependant on ambient temps and tire temps from driving.

Hot air balloons and tires are apples to oranges. By that rational I should add a wing to my car so it can achieve life and there become an airplane car...clearly not how it works in the real world. There are a ton of engineering videos online and articles to read on the topic, go nuts