New for 2005 is the Power TEK engine series from Ski-Doo. All DPM-equipped 800 HO twins get a huge enhancement to their electronic engine management system with the addition of Power TEK. This system involves a throttle position sensor (T), electronic RAVE (E) and a knock sensor (K). This is in addition to the already monitored air temperature, coolant temperature and barometric pressure (on Summits).
This array of sensor based electronics allows three-dimensional ignition mapping with a higher level of precision and control. The new ignition map, now both TPS and RPM based, provides more torque and improved fuel economy. It allows for full calibration compensation for both altitude and air temperature changes.
The dynamic compensation of this new-era DPM provides crisper throttle response and improved acceleration, what youâ€™ll most likely notice when you first ride a Power TEK package. Even the engine operation at idle is more stable and smoother. The knock sensor acts like an automatic fuel octane switch, adjusting the ignition timing as needed for variations in fuel from stop to stop. The ignition starts out in a 91 octane map for maximum performance, then switches to an 87 octane map if detonation is sensed, and resets automatically when shut off.
Power TEK also enhances the operation of the push-button reverse system, RER. Activation is much faster, with a more accurately defined RPM window and fewer failed executions.
Finally, the RAVE powervalves are electronically controlled, much like the eRAVE system found on the 1000 SDI engine package. The valves are held in the closed position longer for maximum fuel efficiency and torque output, even as high as 7300 RPM and 50% throttle!