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Oil mixes for DLE 20 and RCGF 32 - opinons please!

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Oil mixes for DLE 20 and RCGF 32 - opinons please!

Old 02-15-2014, 09:45 PM
  #26  
cng
 
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I run Amsoil Saber 100:1 on my DA 170 for the last three years. As with any gas motor the needles need to be set correctly. The air cooling needs to be set correctly. Oil/Gas mixing ratio's need to be correct when mixing pump gas. And if all these things are done well you will have a great running engine for a long time. Miss any of these and it will greatly effect the life of the engine. You can do more damage to an engine from it not being tuned properly. Listen to your engine. I know mine talks to me I swear
craig
Old 02-16-2014, 08:19 AM
  #27  
757jonp
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I've run DLE 20's on profiles for quite some time now. The "tender" part of this particular engine is the crankpin bearing and it needs all the lube it can get. Since this engine has less than 1/2 the displacement if say a 55cc engine, keep in mind it's only getting less than 1/2 the oil/gas mix of the larger engine. One could say it needs twice as much oil in the mix for the same amount of lube in contact with that bearing.

Granted, I've been abusing these engines terribly, and I'm not complaining, but the first part to go on either one I own has been the crank bearings. Running Stihl 30:1 I see no significant carbon buildup ever.

Run any higher mix at your peril, but I'd recommend that you have a new crank assy and rod standing by because you'll need it shortly! I've got two in the drawer right now.
Old 02-16-2014, 08:56 AM
  #28  
Mk23socom
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Originally Posted by Pylonracr
I mix my Amsoil Sabre at about 60 - 75 to 1 and have had great results. Maybe I am just lucky, but I am not going to argue with success.
well, hearing about bearing replacements and such.. I have to wonder if running it at 75 wouldn't be a terrible idea.. it's worth looking at.. our experience with the 100 has only been over about 3 seasons so, a relatively short time.

Bruce, I told my old man and he's excited to have an open invite to a neighboring field.. he has a few planes that he would like to maiden that we just don't have any wiggle room to work with where we are, if that's not a problem, that is.. I've heard a few, not so flattering things, about that fella, it's too bad folks can't behave, this is supposed to be fun for everyone.. not just one or two people or a specific genre.

I'm familiar with the under 400ft rule regarding airports too, the club I used to belong to in Missoula, was about 3 miles from the airport. Actually, the old man and I really like flying under that anyway because it's more fun for us. Whether there is an event, or not, we will try and give you a jingle this summer and make a trip out to meet you and some of the guys of your group, we shall fly and tell grand tales of being masters of our universe!!
Old 02-16-2014, 09:09 AM
  #29  
Mk23socom
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Originally Posted by 757jonp
I've run DLE 20's on profiles for quite some time now. The "tender" part of this particular engine is the crankpin bearing and it needs all the lube it can get. Since this engine has less than 1/2 the displacement if say a 55cc engine, keep in mind it's only getting less than 1/2 the oil/gas mix of the larger engine. One could say it needs twice as much oil in the mix for the same amount of lube in contact with that bearing.

Granted, I've been abusing these engines terribly, and I'm not complaining, but the first part to go on either one I own has been the crank bearings. Running Stihl 30:1 I see no significant carbon buildup ever.


Run any higher mix at your peril, but I'd recommend that you have a new crank assy and rod standing by because you'll need it shortly! I've got two in the drawer right now.
We are both fairly particular about cooling air as well as getting the tuning right. We have both witnessed bad tuning and poor air delivery come back and bite someone, it's rarely something you want to see. Another thing to note is that we are using Metalon C2 fuel additive along with the 100:1, so its not just the Sabre in there working. Fuel mixing is pretty tight, we measured out 128oz of liquid in our fuel containers and regardless of what a pump says, we stick to that mark and have yet to see any changes with the behavior of the engines regarding tuning.. so I think that is working well enough. One more thing to consider is that we are flying warbirds exclusively, so I have to think that with proper cooling, precise tuning, proper prop selection and the naturally lower sustained loads on the engine(i.e. not hovering or doing harrier rolls, etc), that it has to play an important part in the conditions the engine is exposed to. I honestly think that this all plays a part in the big picture..
Old 02-16-2014, 09:18 AM
  #30  
cng
 
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Agreed. I burn what I mix that day and if not it goes in the truck. Never done a fuel additive but if it works for you that's great. I fly IMAC and a poorly tuned motor is a disaster waiting to happen. Glad you have a great system that is working for you.
Craig
Old 02-16-2014, 10:27 AM
  #31  
757jonp
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Originally Posted by Mk23socom
We are both fairly particular about cooling air as well as getting the tuning right. We have both witnessed bad tuning and poor air delivery come back and bite someone, it's rarely something you want to see. Another thing to note is that we are using Metalon C2 fuel additive along with the 100:1, so its not just the Sabre in there working. Fuel mixing is pretty tight, we measured out 128oz of liquid in our fuel containers and regardless of what a pump says, we stick to that mark and have yet to see any changes with the behavior of the engines regarding tuning.. so I think that is working well enough. One more thing to consider is that we are flying warbirds exclusively, so I have to think that with proper cooling, precise tuning, proper prop selection and the naturally lower sustained loads on the engine(i.e. not hovering or doing harrier rolls, etc), that it has to play an important part in the conditions the engine is exposed to. I honestly think that this all plays a part in the big picture..
All well and good and if it works for you, that's fine. I would highly recommend you consider a close exam of the crankpin area every two gallons or so in the course of regular PM. The crankpin itself is difficult to examine as the bearing is captured.

Precise tuning on a DLE engine? Pretty difficult to obtain w/o getting into the metering circuit.
Old 02-16-2014, 10:52 AM
  #32  
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Originally Posted by 757jonp

Precise tuning on a DLE engine? Pretty difficult to obtain w/o getting into the metering circuit.
*sigh*.. I know you know what I mean.. keep it tuned happy and refrain from running with a known tuning issue, even if it seems minor..
Old 02-16-2014, 11:57 AM
  #33  
Gizmo-RCU
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kirby
Will try your brew when the last half gallon is gone, soon I hope! Flew one flight yesterday (waded over the snow drift). Just call when you want........Call me so I have your phone no.
Old 02-16-2014, 08:51 PM
  #34  
freeonthree
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I have a Zenoah G20 and I use Quicksilver full synthetic @ 70:1. Dennis
Old 02-17-2014, 05:10 AM
  #35  
Greg Wright
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[QUOTE=jetmech05;11732081]You sure can't hurt an engine with more oil.[/QUOT

Yes you can!!!!!!!

More oil creates more carbon deposits on the piston and cylinder and can make the engine run like crap.

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