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Old 07-26-2005, 01:03 PM   #1
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Default STS Motors

I just got a sts motor and i was wonderin how long does it normally take to break this motor its a Sts Dragon D3R .12
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Old 07-26-2005, 01:36 PM   #2
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D3r is a pain to break in, at least mine was. It requires at least 20 tanks before it stops pinching.
I ran it for 3 tanks (125cc tank) with propeller at around 85c, 10 tanks at 90-95 and then just leaning out to around 110-115c which is normal operating temp.
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Old 07-26-2005, 02:12 PM   #3
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Quote:
Originally Posted by MikeBtc3
I just got a sts motor and i was wonderin how long does it normally take to break this motor its a Sts Dragon D3R .12
Why not go to the STS thread to find out more info
http://rctech.net/forum/showthread.p...00#post1719800
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Old 07-26-2005, 02:15 PM   #4
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Quote:
Originally Posted by gonzoY5
Why not go to the STS thread to find out more info
http://rctech.net/forum/showthread.p...00#post1719800
why just not be a jerk and help
by the way, i cant find the 42t gear for my m18... hopefully i can so i will be there on wednesday
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Old 07-26-2005, 02:21 PM   #5
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Quote:
Originally Posted by joemugen
why just not be a jerk and help
by the way, i cant find the 42t gear for my m18... hopefully i can so i will be there on wednesday
LOL...because NO ONE RUNS a STS here in Miami JOEiwishihadaMUGEN
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Old 07-26-2005, 02:30 PM   #6
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Quote:
Originally Posted by gonzoY5
LOL...because NO ONE RUNS a STS here in Miami JOEiwishihadaMUGEN
i do, its called a mrx-4....so
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Old 07-26-2005, 02:32 PM   #7
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MIKE MIKE...............................

Don't forget to get some cold plugs.
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Old 07-26-2005, 02:34 PM   #8
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2 liter of fuel. Your not supposed to lean it before that.
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Old 07-26-2005, 02:38 PM   #9
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I'm still trying to figure out how to lap the piston. I here that the engine is hard to breakin and that should ease it up alot.
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Old 07-26-2005, 02:40 PM   #10
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I only know of lapping cpu's to get them to have a flatter surface.

Lapping was done that way with a fine grit sandpaper and a piece of glass as its perfectly flat. Im thinking lapping a piston would get the compression to go lower which you could get from adding a shim.

But maybe there is another way to lap the piston.
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Old 07-27-2005, 02:42 AM   #11
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I'm pretty sure lapping is just the name used when you are trying to get 2 surfaces to get a perfect fit. I remember a friend telling me he used to use a method called helical lapping which basically was a rotation and reciprocation movement of the piston to get the right fit of the liner/piston on his boat engines, to speed the process up he used very fine lapping compound.
I guess when we break in our nitro engines we're simply lapping the piston an sleeve in a reciprocating movement only.
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