Air Density Online

Get the most power out of your fuel-injected engine at all hours of the day
at any track you race!

ProCalc from Airdensityonline.com
 

Join today and virtually jet your engine!

With a ProCalc membership, you get 1 year of access to 4 fuel injection jetting calculators that will enable you to virtually jet your MFI engine according to the local weather and elevation. You also get weather updated much more frequently in the tracks list.
 

Get ProCalc for 1 year:

Get access to the ProCalc calculators for 1 year. Learn more

$89.99

Get the ProTune Package

Get ProCalc for 1 year and get ProTune to get you started. Or check out ProTune Advanced to get a detailed analysis of your setup. Get started your best fuel system setup!

Learn more here


See ProCalc in action!


I've taken the 13 gallon pump off the car. Back to my 7 gallon pump... Again, I know right where I'll be because of airdensityonline.com. Thank you for such a great resource!

— Greg Means, Meansracing.com

The calculator does what no one person can do...unless you have thirty plus years in racing and know over 1100 computations. Get it right every time...

— Mike Shriver, SpeedSports

I depend on the ProCalc calculator app. for my fuel injection tuning. I do not have to rely on my engine builder or prior flow bench test any longer.

— Bill Ketterman, long-time drag racer

Get your car dialed in for any track, anywhere you race.

— Bob Szabo, Racecarbook.com


ProCalc uses engineering principles such as air-to-fuel ratio in order to calculate the best jetting for your current environment. This enables you to get the most power out of your mechanical fuel injection engine in a repeatable manner.

No matter how well you have set up your fuel injection, changing weather and environment can make your car run poorly. Variables such as temperature, humidity, and elevation influence how much oxygen is in the air. These changes can affect combustion that, without adequate adjustments, can cause your engine's performance to suffer. Read our FAQ for more information.

Features include:
  • Up to 8 cylindes with 4 jets per cylinder, 1 main bypass and up to 2 high speed bypasses
  • Ability to add percentages of nitro to your methanol setup
  • Up to 3 Baselines for storing different engine setups
  • Calculate main bypass and system pressure
  • Re-calculate specific engine nozzles
  • Export data as a csv file
  • Calculations are based on air-fuel ratio which is a proven method of maintaining consistency
  • Access your calculations on your internet-enabled cell phone while at the track.
  • Ad-free use of the whole site
  • Track weather updated approx every 20 minutes

View screenshots from ProCalc:

air-fuel ratio calculator Jetting calculator populated with data from Baseline #1
baseline profiles Baseline profiles are created and accessed from this page
results of using the afr calculatorResults using the air fuel ratio calculator
 

Get ProCalc for 1 year:

Get access to the ProCalc calculators for 1 year. Learn more

$89.99

Get the ProTune Package

Get ProCalc for 1 year and get ProTune to get you started. Or check out ProTune Advanced to get a detailed analysis of your setup. Get started your best fuel system setup!

Learn more here

 

The fine print:
-Payments are handled through paypal. Upon successful payment you will receive an email that will direct you to complete the registration process. Please check your spam folder in the event that you do not receive your confirmation email.
-All payments are good for 1 year. You must log in and pay again in order to extend your membership. Memberships are not automatically re-billed.
-Your contact information, including your email address, are never shared with third parties. A reminder email will be sent when your membership is nearing it's expiration date and we reserve the right to send occasional announcement emails.
-Questions and comments can be sent via our contact page.
-You can view our full legal and privacy policy here.