DJT & DST: THE NON-SHIFTER ENGINES BY VORTEX
The 2019 season ended with an important title for Vortex, the engine division of the OTK Kart Group, which achieved the first step of the podium of the FIA Karting Junior World Championship with Thomas Ten Brinke. Empowering the Dutch driver was the DJT engine, introduced by the company during the 2019–2021 homologation cycle together with the DST engine, destined for the OK class.
Both models are part of the wide-ranging project which the company is planning for the FIA non-shifter categories. After the first homologation cycle started in 2016, the intent is to gradually work on all of the engine’s areas with the objective of obtaining a simpler, repeatable, reliable but also better performing product
With the DJT and DST engines this intention is established, first of all, in a complete overhaul of the entire engine’s crankcase, intended as the crankcase assembled in all its components, which is completely different than that of the previous model. The technical innovations involve every aspect, from the molds to the casting, the machining, the dimensions and the even smaller componants.
The basic ideas which dictated all the changes are rather simple, starting from the need to have an engine with a lower center of gravity.
From the cylinder upwards, the DJT and DST are identical to their predecessors, the DDJ and DDSread more
The fins of the cooling channels increase the heat exchange surface between the fluid and the cylinderread more
Both the DJT and the DST benefit from a new piston, redesigned on the intake sideread more
The crankcase side transfer ports have been optimized to improve the engine’s behavior at low and medium RPMread more
DJT and DST have the same reed valve pack which has different stoppers than the previous modelread more
The Vortex technicians guarantee that the lowering of the center of gravity is substantial and required considerable work during the design phase to decide which masses to move, rotate or resize to make sure that the equivalent center of gravity of the engine would result in being closer to the ground. Clearly, a repositioning of the center of gravity does not provide extra horsepower, yet it certainly helps in making a better use of those that are already there, by improving the handling thanks to reduced pitching and rolling movements. Through this improvement, even without touching the thermal parts of the engine which remained the same as the previous homologation, it was possible to make a decisive step forward in terms of performance.
Don’t waste time: register now for a 24-hour free trial period. Unlimited articles.
- Constant updates
- Interactive content (360°, Video, Gallery, etc.)
- 15 sections
- Over 500 in-depth articles
- Access to the entire archive
- Available in Italian, English and Spanish
- Access from your desktop and mobile devices