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HelicopterGasser Model RC HelicoptersOther › Motor break in.
01-26-2013 01:16 PM  4 years agoPost 1
kruuuzn

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Traverse City, MI

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I'm nearing the end of my first gallon of Coleman in my new Toxic motor and ready to switch over the the good oil.
What's the next step?

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01-26-2013 04:34 PM  4 years agoPost 2
frgy28

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Santa Clarita, Ca.

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Some Synthetic oil and start to tune for that sweet spot to your flying style...

YES... YoU puLL stART ! ~~~~ NO... it's NoT a FREAKN' Nitro !

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01-26-2013 05:30 PM  4 years agoPost 3
kruuuzn

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Traverse City, MI

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Yepper, I've got the Amsoil Saber just waiting for the next gallon.

How aggressive should I get with the tuning? Should I tune it in slowly over time over the next couple of gallons? Should I avoid using idle-up for awhile?

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01-26-2013 06:53 PM  4 years agoPost 4
frgy28

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Santa Clarita, Ca.

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I'm not familiar with the Amsoil, as I use Motul oil. I was doing 1850 HS on my HWC 600G conversion w/ a stock 260 after my 5th tank with Lawnboy ashless doing sport flying and mild 3D...
I'm up in the 1800-2000 HS with Motul Oil now and running well thru my 4th gallon.
Don't be scare to run a high HS, just keep it rich and tune from there. I run with lots of oil as I'm still learning. My engine seems to be good good with the high oil, though I will be lowering by 1oz. Next gallon.

You can get as aggressive as your engine will allow you to as long as you don't over REV it...

Again, I'm no gas expert as I'm still learning. I'm sure the Gas Gurus will chime in once them come back from flying....LOL

YES... YoU puLL stART ! ~~~~ NO... it's NoT a FREAKN' Nitro !

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01-26-2013 09:39 PM  4 years agoPost 5
fastflyer20

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N. Tonawanda, NY

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Idle up is fine, I break in all engines in idle up with the governor by slowly boost engine rpm. It keeps the RPM's under control which can be hard to do in normal mode on a new heli where the throttle curves are not all set yet. For the second gallon, slowly creep up to 13,500 engine rpm and don't go higher. Toggle between idle 1 and 2 to vary the RPM. Stay away from long high collective maneuvers which build a lot of heat. It is fine to do tic-tocs, multi rolls, etc but don't do any maneuver continuously. The goal is to let the engine load then unload and cool down. It is the piston that takes the time to break in, high RPM's or high sustained loads heat up the piston too much.

I keep the needles on the rich side through the first 2 gallons, it is amazing how much the engines settle in, making it easier to tell if you are lean or rich. Plus as you boost RPMs you want it richer.

By richer I mean around 1/8-3/16 of a turn richer than the final settings.

Gallon 2-3 is when I tweak the needles in, still staying slightly rich, then slowly boost RPM up. After the 3rd gallon, you can run any RPM. It is good to try different rpm's to see what combo gives a sweet spot for your heli and flying style. The Toxic 270TT likes 13,500 and low 14,000's, that is where I usually set idle 1 & 2 once broken in. This is based on a V2 pipe and an aftermarket air filter.

It is more about engine RPM than head speed. Your gear ratio is what yields the head speed. The head speed is important in that it is used to set the governor.

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02-02-2013 02:13 AM  4 years agoPost 6
fatair96

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Newport Beach, CA

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Motor break in

Just wondering why no one has mention mixture during these brake in, as you know what you end up with is usually completely different or subjective depending on your knowledge of two strokes, so chime in very curious of the outcome?

Steve

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02-02-2013 02:37 AM  4 years agoPost 7
fastflyer20

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N. Tonawanda, NY

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Oh please don't start an oil debate!

Any high quality full synthetic will work well.
Ratio is partially dependent on the brand selected, some oils are more viscous than others.

Common oils used are Pennzoil full syn marine, Amsoil, Motul, Honda, Yamalube, Klotz, Bel-Ray, etc. If the needles are set correctly, any of these will give reasonable results.

32:1 is one of the more common ratios.

Some elect to use a petroleum base for break in, such as LawnBoy Ashless.

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02-02-2013 04:05 AM  4 years agoPost 8
Doug Darby

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Dallas, Texas

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+1

Exactly!

doug

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