In theory it is much better than Cats EFI. Cat's EFI is basically a throttle body injection like Doo will be using on the new V1000 touring 4-stroke. The Doo SDI is a port injection system. This is much closer to what is used in high performance auto applications. I have actually read comments in a couple magazine acticles where the testers even preferred DPM to Cat EFI. They are both very effective. Ski-Doo and Polaris both used EFI in the early 90s but for some reason they decided it was not to continue with it.
Skidoo will have a 800 with SDI. It is way better then cats or at least it is on paper. It uses two injectors per cylender and is going to add more hp. It is a form of direct injection so it is much better then arctic cats because that is just throttle body injected which is the poorest type of fuel injection but is still better then carbs.
%50 better oil range
%50 better fuel range
emmitions to match 4 strokes and drivability of a car. Just one flip and go.
A computer moniter the oil injecton and fuel so unlike past oil pumps that are adjusted just buy moving clips and are really only dialed in for full throttle this is way more accurate.
There is also a throttle position sensor and a knock sensor so blown up engines on the lake may be a thing of the past. If the engine gets to hot at full throttle the computer will richen it up so the gas will cool it down.
This is also a new 800 engine it is not the current 800. It is properly designed and enginneered with all of the current 800 faults corrected.
This is the engine to get. Bombardier plans to only release a few but will probably have it on all the engines next year.
The big difference in the SDI system and reg. fuel injection systems, is on the SDI the fuel is injected in to the combustion chamber at a very high presure after the exhaust port has closed. That why you have reduced emission's and better fuel and oil comsomption. Were a reg. EFI is injected into the intake port same as a carb, and with vale timing over lap, the intake and exhast port's are open at the same time.
I think this news is upsetting a lot of future 4 stroke owners. This new technology is going to save us our money, enviroment, and down time. I think this tech is going to give us excellent reliability.
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