Air Density Online

weather calculations for racing engine tuning


Jet your car from anywhere with an internet connection. Have a smartphone? You now have a portable jetting calculator.

for tracks

Real-time density altitude from current weather data at various tracks including: NHRA & IHRA dragstrips, road courses, dirt ovals.


Get your MFI fuel system setup programmed into ProCalc. Even get your dyno data added. You get 1 year of access to ProCalc too!

Thanks for visiting our site. We provide real-time, historical, and forecast weather data for racing engine tuning. We also provide engine tuning tools for mechancial fuel injected racing engines. We are constantly adding tracks to the site. If you'd like to see your track added to the list, send it over. Learn more about this site and it's creators or read some of the articles we've written.

What's New

September 1, 2021

What’s New – September 2021

We are so close to having 900 tracks listed on the site. Send us your tracks so we can break that number!

Tracks added in August:

We want to add as many tracks as we can. If you don't see your race track listed, send it over and we'll add it.

August 18, 2021

New Wind Article in RacingJunk

Our latest article is up over at It's about how to use the wind to your advantage. Check it out.

Using Wind To Your Advantage at the Race Track

August 2, 2021

What’s New – August, 2021

We are getting closer to having 900 tracks listed on the site. Here are the tracks added in July.

If you have any race tracks or courses that aren't listed, let us know and we'll add them.

view news archive

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