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Autorama Sacramento 2018

By Jennifer on January 16th, 2018 in Main News

Bob here. We will again be at the Sacramento Autorama Feb 16-18. Email us at if you are attending. We'll look you up and take pictures. This spectacular event for hot rodders in Sacramento is a favorite.

Check out our articles

By Jennifer on January 15th, 2018 in Main News, Site News

Want to learn more about how to use the information on this site? Maybe you just want to learn more about engine tuning in general? We have written numerous articles for various auto racing magazines. We've also written a series of informational blog posts featured on this site.

Check out our articles page to get an overview of everything we've written.

If you'd like to put the information in these articles to work, try out our online jetting calculators for free.

Have you heard about

By Jennifer on January 8th, 2018 in Main News
check out

Our partner website is a great of resource for racers and engine tuners. was created to sell books related to mechanical fuel injection engine tuning by Bob Szabo, a retired welding engineer and long-time drag racer. Through that site, was created.

In addition to books, the site also has numerous free articles from years of development and research. Check out their free articles and newsletter archive for a wealth of information.

They also have a semi-annual newsletter where you can sign up and receive further information. Check them out!

Happy New Year from Air Density Online

By Jennifer on December 31st, 2017 in Main News

Happy New Year from us to you! We hope 2017 was fruitful with lots of good things to come for 2018.

Give ProCalc a try

Did you know that you can try our online jetting calculators for free for 2 weeks? There is no obligation to buy and you have the opportunity to see if our system works for you. Fill out the form to get started.

More tracks added

We have been doing our year-end cleanup and prep for the upcoming year. We've added metric weather options to the site for anyone who prefers those measurements. We have also added a few tracks to our growing list:

If you don't see your track listed, let us know and we'll add it. We can add tracks in the United States, Canada, and Australia.

Happy Holidays from Air Density Online!

By Jennifer on December 24th, 2017 in Main News
Happy Holidays to You!

Happy Holidays to You from!

If you're enjoying a break from the daily grind over the holidays, give our calculators a try for free!

New – Metric Units

By Jennifer on December 14th, 2017 in Main News

Racing season is under way down under in Australia. Recently, we added the ability to view the weather using metric units just for them.

You can view the list of tracks with metric units here: Metric tracks list.

New for December

By Jennifer on December 1st, 2017 in Main News, Site News

Happy Holidays from all of us at Air Density Online and! We hope you had an excellent racing season and are ready to enjoy some time with your families. We are working on some new features to add to the site for the coming year. We've also added a few more tracks to the list:

As always, if you don't see your track listed, let us know and we'll add it to our site. We can add tracks in the US, Canada, and Australia.

Using Air/Fuel Ratio

By Jennifer on November 21st, 2017 in Info and Education, Main News

On this site, we talk a lot about finding your ideal air/fuel ratio. It is the concept that our mechanical fuel injection jetting calculators are built on, and it is the concept used in electronic fuel injection in order to maintain a good fuel system setup. Understanding air/fuel ratio can be very helpful when setting up your fuel system. It can mean the difference between a successful run and a blown engine.

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