This four-cylinder 2-stroke – the DNE Quad 1560 – produces nearly 375 HP and 200 foot-pounds of torque. Built by Don Emery at DNE Performance in Ontario, it is based on Rotax 800 triples welded together with stroked Ski-Doo crankshafts. Last winter the sled ran 172.6 mph, consuming between 3 and 4 liters of fuel per pass through the 52mm carbs.
Emery tells SnowTech they have a 1750cc engine in the works that is expected to produce 400+ HP and should run in the 180+ mph range. DNE has built a number of these wild 2-stroke Rotax engines over the years, using either bored stock cylinders or custom cast cylinders, depending on the desired displacement.