2004LEBanshee Posted October 23, 2005 Report Share Posted October 23, 2005 (edited) I was reading one of my many fishing mags and the had a article about all the new out board motors that were out they rated the new bomb... 2 stroke to be the fastest, cleanest burning, and most fuel efficent. Also it didnt need serviced for a couple years. It was rated the best motor out. They went on to talk about how this was previously believed to be not possible for a 2 stroke. Why wollnt we bring some of this tech to quads or other engines. did any one see this it was a couple months ago. I believe it was sport fishing. Edited October 23, 2005 by 2004LEBanshee Quote Link to comment Share on other sites More sharing options...
MudSlinger09 Posted October 23, 2005 Report Share Posted October 23, 2005 i think itd be pretty neat to see all the companys bring back their old 2 stroke models ... but thats a dream .... a good good dream Quote Link to comment Share on other sites More sharing options...
dawarriorman Posted October 24, 2005 Report Share Posted October 24, 2005 I worked at a boat shop up until a couple months ago, and learned alot about the direct injection 2 strokes. Im almost positive that somebody has snowmobiles with DI 2 strokes (I want to say Arctic Cat, but im not sure). I agree that they should do it, and I think it would have great success. Not sure if everyone knows about these, but basically its a regular 2 stroke, only the gas doesn't go through the reed valve, it is instead injected directly into the cylinder. And by doing this, they can wait until the piston covers up the exhaust port, and then inject the fuel. Which gives you your fuel efficiency. Only the air and oil come through the reed valves. The only potential problem is that normally the oil is in the gas, which thins the oil so it gets to all the internal surfaces easily. With DI, it isn't, which gave Mercury problems at first (Optimaxs are the devil). Yamaha came up with some ring design that supposedly stopped that, but with bikes and the reeds going into the cylinder instead of the bottom of the crank, I don't think it would be as much of a problem. If I had the money Id love to try and turn a banshee into a DI motor, although it would take a lot of work. Quote Link to comment Share on other sites More sharing options...
MudSlinger09 Posted October 24, 2005 Report Share Posted October 24, 2005 if im not mistakin yamaha made two stroke dirtbikes with this injection back in the 80`s???pretty sure they did cuz my dad was tellin me bout his that would give him problems ... ended up changin it back to premix Quote Link to comment Share on other sites More sharing options...
chris642 Posted October 24, 2005 Report Share Posted October 24, 2005 if im not mistakin yamaha made two stroke dirtbikes with this injection back in the 80`s???pretty sure they did cuz my dad was tellin me bout his that would give him problems ... ended up changin it back to premix 428989[/snapback] hes probally talking about oil injection, like what is on the blaster right now. this is just so you dont have to mix the gas, it has no other advantages, unlike direct injection. you just fill a seperate oil tank and the oil is feeded into the carb where it mixes with the gas, but this could fail without you even knowing, thats why your dad went back to premix. Quote Link to comment Share on other sites More sharing options...
MudSlinger09 Posted October 24, 2005 Report Share Posted October 24, 2005 (edited) youre right Edited October 24, 2005 by MudSlinger09 Quote Link to comment Share on other sites More sharing options...
brock_fuzzy_69 Posted October 24, 2005 Report Share Posted October 24, 2005 i would say he is likely talkin about the new johnson evenrude motors they are now owned by ROTAX by direct injection we mean squirting the oil or oil and fuel into the chamber much like with a diesel engine Quote Link to comment Share on other sites More sharing options...
dawarriorman Posted October 24, 2005 Report Share Posted October 24, 2005 i would say he is likely talkin about the new johnson evenrude motorsthey are now owned by ROTAX by direct injection we mean squirting the oil or oil and fuel into the chamber much like with a diesel engine 429014[/snapback] Only the fuel is directly injected into the chamber. The oil is injected, but it has to come through the reed valves so the bottom end gets lubricated. Quote Link to comment Share on other sites More sharing options...
PassionRE Posted October 24, 2005 Report Share Posted October 24, 2005 Direct injection is a killer design, less fuel, more power, less emmisions. Originally developed for high performance piston aircraft in the 40's. Only snag in the design is that the fuel pumps that are required to overcome cylinder pressure at near TDC go through a beating....we'll see how they hold up over time I guess....Jim Quote Link to comment Share on other sites More sharing options...
STLBILL Posted October 24, 2005 Report Share Posted October 24, 2005 I'm thinking it would be a whole lot easier to advertise they are going to bring back two-strokes and let them ride on national forest land. Then shoot all the tree-huggin' sum bitches that show up to protest. Quote Link to comment Share on other sites More sharing options...
Yaxy Posted October 24, 2005 Report Share Posted October 24, 2005 Bombardier has been putting SDI technology into there 2-stroke sleds since 2003. SDI technology is available in their 600 and 800 models and are great motors. Bomber also puts the same technology into their (Evinrude) boat motors. Simple and light weight, plus alot of power, that is what it's about. Chris Quote Link to comment Share on other sites More sharing options...
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