Air Density Online

weather calculations for racing engine tuning


Oct 9, 17 - Give ProCalc a try

Are you on the fence about trying ProCalc? Wanna give it a try? Sign up for a free 2 week trial to see if you like it!

Sign up for a free trial

If you've given ProCalc a try but need more assistance setting up your engine, check out ProTune, our consulting service for MFI racers.


Oct 2, 17 - New for October

We're winding down for the year and getting ready for the holidays. Can you believe this year has gone by so quickly?!

We've been mentioned in a few publications recently. We're excited to be writing a couple more articles in the coming months. We'll announce them here and on our Facebook Page when they come out.

In September we added several more tracks to our race track weather page. Check them out below:

As always, if you don't see your track in the list, let us know and we'll add it! We can add tracks in the United States, Canada, and Australia.


Sep 20, 17 - Check out the August 2017 edition of Engine Builder

We wrote an article for the August 2017 issue of Engine Builder Magazine. The article is on ignition timing. Check it out on page 60:

Understanding Ignition Timing: Making maximum power means knowing the science


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