Gulfstream1 Posted October 11, 2009 Share Posted October 11, 2009 Anyone modified their PPG for fuel injection? – better performance, more power and less fuel consumption(?). Quote Link to comment Share on other sites More sharing options...
fanman Posted October 11, 2009 Share Posted October 11, 2009 It's an option on a Bailey. Quote Link to comment Share on other sites More sharing options...
custom-vince Posted November 25, 2009 Share Posted November 25, 2009 http://www.envirofit.org/?q=our-products/2-stroke-retrofit Retro Fit Direct Injection for two stroke engines. Snow mobiles have direct injection on some of there 2 strokers. Quote Link to comment Share on other sites More sharing options...
pete_b Posted November 25, 2009 Share Posted November 25, 2009 http://www.envirofit.org/?q=our-products/2-stroke-retrofitRetro Fit Direct Injection for two stroke engines. Snow mobiles have direct injection on some of there 2 strokers. I contacted them about 18 months ago and they said that it will not be generally available for at least a few years as it is mainly for really congested two stroke countrys ie Asia area. thios is the way to go but the cost of doing on a small scale is toooooooo expensive. Quote Link to comment Share on other sites More sharing options...
tj Posted November 26, 2009 Share Posted November 26, 2009 Not being very technically minded -what's the advantage of fuel injection? Tj Quote Link to comment Share on other sites More sharing options...
pete_b Posted November 26, 2009 Share Posted November 26, 2009 Not being very technically minded -what's the advantage of fuel injection? Tj More power Less fuel No carb to have to set up and alter No choke No expansion box And you could have it so as when you are cruising it only fires every other rotation (same as the four stroke)so you would get great economy then Quote Link to comment Share on other sites More sharing options...
fanman Posted November 26, 2009 Share Posted November 26, 2009 and no carb icing issues. I can't see how FI removes the need for the expansion chamber. Can you explain. Quote Link to comment Share on other sites More sharing options...
pete_b Posted November 26, 2009 Share Posted November 26, 2009 and no carb icing issues.I can't see how FI removes the need for the expansion chamber. Can you explain. Im no writer but I can talk a lot With a normal two stroke due to the design a certain amount of fuel/air flows straight through in to the exhaust after it pushes the burnt fuel mix out of the combustion chamber. http://science.howstuffworks.com/two-stroke2.htm The expantion box is designed to send a shock wave back up the pipe to force this wasted fuel mix back in to the combustion chamber http://science.howstuffworks.com/framed ... pipes.html with fuel injection the fuel is injected in to the compressed air after the piston has closed the ports so no fuel is wasted. Quote Link to comment Share on other sites More sharing options...
outkast Posted November 26, 2009 Share Posted November 26, 2009 and no carb icing issues.I can't see how FI removes the need for the expansion chamber. Can you explain. Im no writer but I can talk a lot With a normal two stroke due to the design a certain amount of fuel/air flows straight through in to the exhaust after it pushes the burnt fuel mix out of the combustion chamber. http://science.howstuffworks.com/two-stroke2.htm The expantion box is designed to send a shock wave back up the pipe to force this wasted fuel mix back in to the combustion chamber http://science.howstuffworks.com/framed ... pipes.html with fuel injection the fuel is injected in to the compressed air after the piston has closed the ports so no fuel is wasted. just to add to what Pete has said, you also get a much more accurate fuel / air mix wich also enhances economy. Quote Link to comment Share on other sites More sharing options...
pete_b Posted November 26, 2009 Share Posted November 26, 2009 http://engineeringtv.com/blogs/etv/arch ... ution.aspx Quote Link to comment Share on other sites More sharing options...
fanman Posted November 26, 2009 Share Posted November 26, 2009 Aha, went back and looked properly at the original link. Hadn't realised that the injection was into the head and not a straight carb replacement. Couldn't see how you could eliminate the expansion chamber if the injection was in crab replacement form to the crankcase and then via transfer port to the cylinder. I guess then that is what the 'direct' part means. Quote Link to comment Share on other sites More sharing options...
custom-vince Posted November 27, 2009 Share Posted November 27, 2009 I don't understand why it is so difficult, chip controlled injector directly into the cylinder head. Drill big hole, tap thread, bolt in suitable injector. I do know the direct diesel injectors are expensive. How long before we can see a 4 stroke TURBO... or even an electric supercharger, I know they are about for cars. I looked a building a diesel trike a while back. Needed a variable pitch prop due to limited rev range and got to complicated to take it off the drawing board. Quote Link to comment Share on other sites More sharing options...
pete_b Posted November 27, 2009 Share Posted November 27, 2009 I don't understand why it is so difficult, chip controlled injector directly into the cylinder head. Drill big hole, tap thread, bolt in suitable injector.I do know the direct diesel injectors are expensive. How long before we can see a 4 stroke TURBO... or even an electric supercharger, I know they are about for cars. I looked a building a diesel trike a while back. Needed a variable pitch prop due to limited rev range and got to complicated to take it off the drawing board. Read your last line and you have answered your own question its a lot more than a chip controlled injector directly into the cylinder head. Drill big hole, tap thread, bolt in suitable injector. Quote Link to comment Share on other sites More sharing options...
custom-vince Posted November 27, 2009 Share Posted November 27, 2009 yes it is surprising how many projects get shelved. Quote Link to comment Share on other sites More sharing options...
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