Jetting for Vortex KZ Kart

For the weather right now and your engine setup, this app gives you the jetting for Vortex-engined KZ and KZ2 karts: main jet, emulsion tube, needle type and clip position, idle diffuser and idle jet.

It covers all 9 Vortex engines: RVS with the Dell'Orto PHBE 30, RVS with the Dell'Orto VHSH 30, RVX, RVXX, RVZ, RKZ, RSZ, RTZ and VTZ, stock or tuned.

You can pull the weather from the nearest public station, using the phone's location, or type it in yourself. It works without signal too: the whole calculation happens on the phone.

THE FOUR SCREENS

· Results. The carburettor parts, air density, density altitude and relative horsepower. Plus two fine-tuning controls —high and mid— in steps of a tenth, to adapt the recommendation to your own engine. From here you save the session to the logbook or share the setup as an image.

· Conditions. Temperature, pressure, humidity and altitude. Pull them from the nearest station or type them in; the app tells you how long ago the reading was taken. And you can pick your track from a list of 112, which fills in its altitude and suggests the track type from its length.

· Engine. The model, float setup, float height, oil mix and track type.

· Logbook. Note every session: what the app recommended, what you actually fitted, how it ran at low, mid and high, laps, best lap and rpm. Export it to CSV for a spreadsheet, back it up, and import it on another phone or in the iPhone app.

ALSO

· Fuel mix calculator: give it the fuel and the oil and it gives you the ratio, or the other way round. In litres, millilitres, gallons or ounces.
· Your units: ºC and ºF, metres and feet, mb, hPa, mmHg and inHg.
· Dark mode.

PERMISSIONS

Just two, both optional:
· Location, to find the nearest station. If you don't grant it, you type the weather in and the app works just the same.
· Internet, to query that station.

The app collects no personal data. Your logbook stays on your phone.

OTHER APPS FROM US

Under "More apps" you'll find jetting apps for other kart engines —IAME KZ, IAME X30 and Leopard, TM, Modena, Maxter, Rotax Max and Rotax Max EVO, CR125—, the air density meter, Kart Chassis Setup and our motocross apps.

Recent changes:
2.0 is a complete rewrite.

· VTZ engine.
· Logbook: what you fitted and how it went, with CSV, backup and import.
· Fuel mix calculator.
· 112 tracks with their altitude.
· New interface, with dark mode.

The recommendation now matches the iPhone app: on the RVZ, RKZ, RSZ and RTZ the idle diffuser becomes B100 and, in some cases, the emulsion tube changes.