# Jetting Vortex KZ1 / KZ2 Kart — RTZ, RSZ, RKZ, RVZ, RVXX, RVX > Kart engine jetting recommendations based on weather and configuration. (iPhone/iPad app by Ballistic Solutions LLC.) - Source: https://appshunter.io/ios/app/jetting-vortex-kz1-kz2-kart/id1451631744 (this page in markdown: same URL + `.md`) - Developer: [Ballistic Solutions LLC](https://appshunter.io/developer/1611909747) - Category: Sports, Utilities - Price: $14.99 - Rating: 4.60/5 from 11 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 39 MB - Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 22 more - Released: 2019-02-07 - Data updated: 2026-08-07 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/jetting-vortex-kz1-kz2-kart/id1451631744/reviews.md ## What is Jetting Vortex KZ1 / KZ2 Kart? This app provides, using temperature, altitude, humidity, atmospheric pressure and a given engine configuration (engine model, floats, carb bore, emulsion tube type, floats, oil ratio, fuel type), 12 !!! jetting recommendations for Vortex RTZ, RSZ, RKZ, RVZ, RVXX, RVX, RVS engines that have DellOrto VHSH 30 carbs. This app can obtain automatically the position and altitude to get the temperature, pressure and humidity from the nearest weather station thought internet. Internal barometer is used on supported devices for better precision. Application can run without GPS, WiFi and internet, in this case user has to enter weather data manually. • 12 different jetting setups! • For each jetting setup, the following values are given: main jet, emulsion tube, needle type and position (including intermediate positions with washer), throttle valve, idle jet (outer pilot jet), idle emulsifier (inner pilot jet), air screw position • Fine tuning for all these values • You can create your carburetor and check the performance (over 90 needles available) • History of all your jetting setups • Graphic display of fuel mix quality (Air/Flow Ratio or Lambda) • Support two idle emulsion tube types (DP or DQ) • Selectable throttle valve Size • Selectable fuel type (gasoline with or without ethanol, Racing fuels available, for example: VP C12, VP 110, VP MRX02) • Adjustable fuel/oil ratio • large selection of floats • Adjustable floats height • Mix wizard to get the perfect mix ratio (fuel calculator) • Carburetor ice warning • Possibility of use automatic weather data or a portable weather station. • let you use different measure units: ºC y ºF for temperatures, meter and feet for altitude, liters, ml, gallons, oz for fuel, and mb, hPa, mmHg, inHg atm for pressures. The application contains five tabs, which are described next: • Results: In this tab, 12 different jetting setups are shown. These data are calculated depending on the weather conditions and the engine and track configuration given in the next tabs. For each jetting setup, the following values are given: main jet, emulsion tube, needle type and needle position, idle emulsifier (inner pilot jet) and idle jet (outer pilot jet), throttle valve, air screw position. This tab lets do a fine tuning adjustment for all this values for each jetting setup to adapt to the concrete engine. Besides this jetting information, the air density, density altitude, relative air density, SAE - dyno correction factor, station pressure, SAE - relative horsepower, oxygen pressure and volumetric content of oxygen are shown too. You can also see in a graphic form the calculated ratio of air and fuel (lambda). • History: This tab contains the history of all jetting setups. • Compare: On this tab, you can compare two carburetors. To do this, you need to set all the components of the carburetor. The result will be shown in the form of graphs of the ratio of air and fuel (or lambda). • Engine: You can configure in this screen the information about the engine, that is, engine model (RTZ, RSZ, RKZ, RVZ, RVXX, RVX, RVS), carburetor diameter, emulsion tube type, float type and height, fuel type, oil mix ratio and type of the circuit. Depending of this parameters, the jetting setups will be adapted. • Weather: In this tab, you can set the values for current temperature, pressure, altitude and humidity. Also this tab allows to use the GPS to get the current position and altitude, and connect to an external service (you can choose one weather data source from several possible) to get the weather conditions of the nearest weather station. In addition, this application can work with a pressure sensor built into the iPhone. You can see if it is available on your device and turn it on or off. If you have any doubt about using this App, please, contact us. We answer every question, and we take care of all comments from our users to try to improve our software. We are also users of this application. ## Key features - 12 jetting recommendations - Automatic weather data acquisition - Fine-tuning for jetting values - Carburetor performance simulation - History of jetting setups - Graphic display of fuel mix quality - Support for different fuel types and oil ratios ## Chart rankings - #199 in Top Paid · Sports (US App Store) ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/jetting-vortex-kz1-kz2-kart/id1451631744/reviews.md ### 2/5 — Jet doesn’t change and needs Rok shifter engine *2022-03-31* Need to add ROK Shifter to the engine options, and adjust jetting to show an option for Rok shifter specs on the carb. I can’t get any settings to mirror the specs in rule book and with wildly varying weather conditions it seems to always show a 165 jet. ### 5/5 — Good *2019-04-02, version 1.1* Jetted my rvxx with the reccomended values and kart runs better! ### 5/5 — Good *2019-04-01* Jetted my rvxx with the reccomended values and kart runs better! ### 5/5 — Funciona muy buen *2019-03-30, version 1.1* Lo he usado y es la app q mejor q funciona. ### 5/5 — Magnifico *2019-03-28, version 1.1* Para mi es un programa magnifico, una herramienta necesaria para tener una buena carburacion. ### 5/5 — Bravo *2019-03-20* Reduced lap times 1.2 seconds!!! using this app. Easy interface, fast GPS and weather acquistion. Bravo! ### 5/5 — Gut!!! *2019-03-03, version 1.0* Das spart auf jeden Fall Zeit und Geld. Sehr glücklich. ### 5/5 — ***** *2019-03-02, version 1.0* Die ganze zeit benutzen wir dieses App. Ich empfehle dieses Programm wärmstens für anfänger und mechaniker. Dadurch sparen sie viel zeit. ### 5/5 — Nice *2019-02-28, version 1.0* Easy interface, fast GPS and weather acquistion. Bravo! ### 5/5 — Perfect *2019-02-26, version 1.0* Work perfect for me. Save a lot of time and money for me and my mechanic. ## Frequently asked questions about Jetting Vortex KZ1 / KZ2 Kart ### What Vortex engines does Jetting Vortex support? Jetting Vortex provides jetting recommendations for Vortex RTZ, RSZ, RKZ, RVZ, RVXX, RVX, and RVS engines that have DellOrto VHSH 30 carburetors. ### How does Jetting Vortex get weather data? The app can automatically obtain the user's position and altitude to retrieve weather data (temperature, pressure, humidity) from the nearest weather station via the internet. It can also use an internal barometer on supported devices for enhanced precision or allow manual input if internet connectivity is unavailable. ### What specific jetting components can be adjusted in Jetting Vortex? For each jetting setup, the app provides recommendations and allows fine-tuning for main jet, emulsion tube, needle type and position, throttle valve, idle jet, idle emulsifier, and air screw position. ### Can I simulate carburetor performance with Jetting Vortex? Yes, you can create your carburetor configuration and check its performance within the app. It offers over 90 needles and a large selection of floats to simulate various setups. ### Does Jetting Vortex have ads? No, Jetting Vortex does not contain advertisements. It is a paid application designed for serious users. ### What is the price of Jetting Vortex? Jetting Vortex is available for a one-time purchase of $14.99. ### What units of measurement does Jetting Vortex support? The application supports various units for temperature (ºC, ºF), altitude (meters, feet), fuel (liters, ml, gallons, oz), and pressure (mb, hPa, mmHg, inHg, atm). ### How often is Jetting Vortex updated? The latest version of Jetting Vortex is 2.4, which was last updated on January 27, 2025. This indicates a commitment to ongoing development and improvements. ## Version history (last 5 releases) ### 2.4 — 2025-01-27 • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • We added new fuels, this is VP Racing C12, VP Racing 110, VP Racing MRX02, VP RACING MS93, and gasoline with ethanol. It require a richer or leaner carburation than regular premium gasoline • Now, if you don’t want to see intermediate (half-steps) positions for the needle, you can turn it off on the 'Engine' tab • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy • Bug fixes for 'share setup with friends' feature ### 2.3 — 2021-11-01 • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • We added new fuels, this is VP Racing C12, VP Racing 110, VP Racing MRX02, VP RACING MS93, and gasoline with ethanol. It require a richer or leaner carburation than regular premium gasoline • Now, if you don’t want to see intermediate (half-steps) positions for the needle, you can turn it off on the 'Engine' tab • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy • Bug fixes for 'share setup with friends' feature ### 2.2 — 2021-10-29 • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • We added new fuels, this is VP Racing C12, VP Racing 110, VP Racing MRX02, VP RACING MS93, and gasoline with ethanol. It require a richer or leaner carburation than regular premium gasoline • Now, if you don’t want to see intermediate (half-steps) positions for the needle, you can turn it off on the 'Engine' tab • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy • Bug fixes for 'share setup with friends' feature ### 2.1 — 2020-11-21 • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • We added new fuels, this is VP Racing C12, VP Racing 110, VP Racing MRX02, VP RACING MS93, and gasoline with ethanol. It require a richer or leaner carburation than regular premium gasoline • Now, if you don’t want to see intermediate (half-steps) positions for the needle, you can turn it off on the 'Engine' tab • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy • Bug fixes for 'share setup with friends' feature ### 2.0 — 2020-10-24 • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • We added new fuels, this is VP Racing C12, VP Racing 110, VP Racing MRX02, VP RACING MS93, and gasoline with ethanol. It require a richer or leaner carburation than regular premium gasoline • Now, if you don’t want to see intermediate (half-steps) positions for the needle, you can turn it off on the 'Engine' tab • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy • Bug fixes for 'share setup with friends' feature ## Apps similar to Jetting Vortex KZ1 / KZ2 Kart | App | Rating | Price | Category | | --- | --- | --- | --- | | [AICS FROSINONE](https://appshunter.io/ios/app/aics-frosinone/id1438674800) | — | Free | Sports | | [Microballistics](https://appshunter.io/ios/app/microballistics/id1467067380) | 2.3 (3) | Free | Sports | | [Jetting Maxter KZ / ICC Kart](https://appshunter.io/ios/app/jetting-maxter-kz-icc-kart/id1476036840) | 5.0 (4) | $14.99 | Sports | | [Skeet25Pro](https://appshunter.io/ios/app/skeet25pro/id1443156860) | 2.7 (3) | Free | Sports | | [ESF](https://appshunter.io/ios/app/esf/id1441362200) | — | Free | Sports | | [WKGSIM](https://appshunter.io/ios/app/wkgsim/id1445976080) | — | Free | Sports | ## More apps by Ballistic Solutions LLC - [Jetting for TM KZ / ICC Kart](https://appshunter.io/ios/app/jetting-for-tm-kz-icc-kart/id1450856766) - [Jetting Modena KZ1 / KZ2 Kart](https://appshunter.io/ios/app/jetting-modena-kz1-kz2-kart/id1451498700) - [Jetting IAME KZ1 / KZ2 Kart](https://appshunter.io/ios/app/jetting-iame-kz1-kz2-kart/id1451745477) - [Jetting Rotax Max EVO Kart](https://appshunter.io/ios/app/jetting-rotax-max-evo-kart/id1451969138) - [Jetting Rotax Max Kart](https://appshunter.io/ios/app/jetting-rotax-max-kart/id1453317954) All apps by Ballistic Solutions LLC: https://appshunter.io/developer/1611909747 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*