weather calculations for racing engine tuning
ProCalc
Jetting
Calculator
Jet your car from anywhere with an internet connection. Have a smartphone? You now have a portable jetting calculator.
FREE
Weather
for tracks
Real-time density altitude from current weather data at various tracks including: NHRA & IHRA dragstrips, road courses, dirt ovals.
ProTune
Custom
Setups
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
June 9, 2022
More on the High Speed Bypass for MFI from Brad Cauzillo, Kinsler FI

In our recent MFI high speed bypass article, a photo is included showing a high speed bypass from an Outlaw Sprint Car running at the Placerville Raceway, Placerville, Ca:
Brad Cauzillo, Marketing Manager, Kinsler Fuel Injection, added the following info to that photo: "...how NOT to plumb your race car.
The bypass valves should:
- a) Be plumbed as close to the pressure change source(barrel valve) as possible
- b) Never rely on a aluminum union fitting as a mounting source.
- c) Be connected with a length of hose on the inlet and outlet to provide anti-vibration for the internal components."
June 1, 2022
What’s New – June 2022
It's heating up here in Las Vegas and in the rest of the country. We've added some new tracks to the site and are constantly adding more tracks all the time. Here are some of the tracks we recently added:
- Free Bird Dragway - Rayland, OH
- Tri Cities Kart Club - Richland, WA
- Idaho Regatta - Burley, ID
- La Paz County Park - Parker, AZ
- Mason City Motor Speedway - Mason City, IA
- Winneshiek Raceway - Decorah, IA
- Deer Creek Speedway - Spring Valley, MN
If your track isn't listed on our site, let us know and we'll add it!
May 20, 2022
New Article for RacingJunk!

Check out our newest article posted on RacingJunk.com.
Subtle Variations Can Make a Big Difference In a Racers Tune Up
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