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bob_nj · 07-07-2007, 02:37 AM

mfuess --> I gotta tell you that I went to the field today and tried your tuning method.I took my time, used a tach, and got great results!I've been running gas engines for about 5 years now, and am not a know it all by any means. What you said though finally sunk into my brain.It works, it truly works. I'm convinced that alot of the threads I read about engine problems can be solved if more people really understood how these carbs work.Hats off!That being said, let's talk about something..You say in one of your posts that a 2 cycle engine should never four stroke while it's running, ever.Don't remember where I saw that, and forgive me if I've mis-quoted, but let's use that as a premise.My engine now runs like that, really smooth, one click on the throttle notices an engine response, and runs great in all attitudes. Inverted and knife edge are flawless.Truth be told, it makes me really really nervous to have my engine run so good.It has to be my glo engine mentality that's been burned in over the years.To add another's opinion, here is a quote from the site of Blain Austin here -->http://www.blaineaustin.com/engines.htmIf my engine keeps quitting what should I do? I get asked this all the time. The first thing you should do is richen the high end needle value. What causes the engine to quit is that its getting hot. If it is running rich it will not quit. Avoid it running smooth. You want it to have a little burble. If it sounds like a sewing machine, well that's not good. That means it is going lean and it is getting ready to quit. Don't be afraid to turn the needles. I have guys all the time tell me there engine isn't running to peak performance but they are afraid to turn the needles. Always remember rich is good and safe but don't sacrifice performance because your afraid it will get hot.Here's the gyst of my question to you.The part where he says -> "Avoid it running smooth. You want it to have a little burble. If it sounds like a sewing machine, well that's not good." is what makes me a little nervous.My engine is running great, and it's because it is running smooth.When I got a one click throttle response, I knew it was smooth.Myself and a ton of others are always concerned about a flameout for whatever reason.Blaine mentions going lean, and it sounds like he means on the top end. My reason for concern is that I like to harrier, hover, and otherwise fly low and slow with the nose in the air. I am always thinking about the motor leaning on the low end in these attitudes, or just quitting?So to summarize, is it possible to tune your way and have the possibility of it being a hazard with the type of flying I like to do?Thanks again for your timeBob

07-07-2007, 02:37 AM	#136
bob_nj Bad-ass Super Contributer! Join Date: Jan 2006 Location: Vineland, New Jersey Age: 53 Posts: 403	Gas engine tuning for newbies.... mfuess --> I gotta tell you that I went to the field today and tried your tuning method.I took my time, used a tach, and got great results!I've been running gas engines for about 5 years now, and am not a know it all by any means. What you said though finally sunk into my brain.It works, it truly works. I'm convinced that alot of the threads I read about engine problems can be solved if more people really understood how these carbs work.Hats off!That being said, let's talk about something..You say in one of your posts that a 2 cycle engine should never four stroke while it's running, ever.Don't remember where I saw that, and forgive me if I've mis-quoted, but let's use that as a premise.My engine now runs like that, really smooth, one click on the throttle notices an engine response, and runs great in all attitudes. Inverted and knife edge are flawless.Truth be told, it makes me really really nervous to have my engine run so good.It has to be my glo engine mentality that's been burned in over the years.To add another's opinion, here is a quote from the site of Blain Austin here -->http://www.blaineaustin.com/engines.htmIf my engine keeps quitting what should I do? I get asked this all the time. The first thing you should do is richen the high end needle value. What causes the engine to quit is that its getting hot. If it is running rich it will not quit. Avoid it running smooth. You want it to have a little burble. If it sounds like a sewing machine, well that's not good. That means it is going lean and it is getting ready to quit. Don't be afraid to turn the needles. I have guys all the time tell me there engine isn't running to peak performance but they are afraid to turn the needles. Always remember rich is good and safe but don't sacrifice performance because your afraid it will get hot.Here's the gyst of my question to you.The part where he says -> "Avoid it running smooth. You want it to have a little burble. If it sounds like a sewing machine, well that's not good." is what makes me a little nervous.My engine is running great, and it's because it is running smooth.When I got a one click throttle response, I knew it was smooth.Myself and a ton of others are always concerned about a flameout for whatever reason.Blaine mentions going lean, and it sounds like he means on the top end. My reason for concern is that I like to harrier, hover, and otherwise fly low and slow with the nose in the air. I am always thinking about the motor leaning on the low end in these attitudes, or just quitting?So to summarize, is it possible to tune your way and have the possibility of it being a hazard with the type of flying I like to do?Thanks again for your timeBob __________________ http://www.rcsites.net/bob_nj/index.html Last edited by bob_nj; 07-07-2007 at 06:18 AM.