Air Density Online

weather calculations for racers


Feb 19, 17 - Why is it hottest a couple hours after noon? Why is it coldest a couple hours after dawn?

At any given point on earth, solar noon is when the sun is most directly overhead. So why is it not also the hottest part of the day? In the absence of weather fronts to influence the temperature, the hottest part of the day is typically a couple of hours after noon.

In a similar fashion, the coldest part of the day should be right before dawn but it's not. in the absence of weather fronts, the coldest part of the day is an hour or two after sunrise. Why is that?

(read more...)

Feb 16, 17 - New Article in Engine Builder Magazine

Our latest article has come out in Engine Builder Magazine! It is called Today's Grass Roots Racing Market.

Check it out on page 26 of the physical magazine or on page 28 of the online version.

We'd also like to thank Engine Builder Magazine for having us. It is always a pleasure to work with them.


Jan 31, 17 - New Year, New Racing Season!

Hopefully we have all recovered from the holidays and are gearing up for the new racing season. We have been working hard to develop our ProTune Package and getting the website it top shape.

We added a couple of tracks in Canada in January:

If your track isn't listed, let us know and we'll add it. We can add tracks in the US, Canada, and Australia!


view news archive

Thanks for visiting. View the FAQ section for more information about using this site.