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!

October 15, 2018

New article in EngineLabs, also see Racingjunk

Check out a few new things we've done recently.

We have a new article in EngineLabs you should check out: By the Numbers: Tuning with Air/Fuel Ratio and Lambda We have more articles with them on the weay.

Also check out our recent news release: Air Density Online Enables Engine Tuning and Weather From Your Smartphone. We are looking forward to getting our name out more in the future!

October 11, 2018

2 ways to get density altitude without a portable weather station

Tracking density altitude, air density, and grains of water on race day is useful for a strong tune-up. Many racers bring portable weather stations to help dial in their setup. You already bring a trailer full of tools with you to the track. A portable weather station is just one more item to lose or break. Did you know that over time, portable weather stations lose accuracy without regular calibration? That's one more thing you need to do.

Here are 2 ways you can still get useful weather information without a portable weather station:

(read more...)

October 8, 2018

Brush up on your air/fuel ratio skills

If you've been tracking your air/fuel ratio for the purposes of maintaining your engine setup, brush up on a few concepts here:

If you want more detailed information about air/fuel ratio, check out our partner site, for books and information about racing engine tuning.

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