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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › need engine advise
01-03-2011 01:58 AM  7 years agoPost 1
stargazerww

rrApprentice

parkside, pa.

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got a question yall..i am upgrading my 30 to a 50 after a crash and i am offering my 39 up for sale or trade and a guy offered me a os50sx non hyper.. how much less performance is there compared to a

os 50 hyper =
OS 55HZ-H =
TT 50 =

can the os 50 sx be upgraded to a hyper ie.[ne piston,sleeve,head] and such?

i am not doing hard 3d yet but i am doing casual aerobatics punch outs and starting the basics of 3d maneuvers ...

oh and if anyone has any rappy 60 parts laying around let me know i could use some as i have just crashed because my thumbs stopped working!!

thank you all for any help you may offer and HAPPY NEW YR

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01-03-2011 02:51 AM  7 years agoPost 2
CoronaL

rrKey Veteran

Winnebago IL

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my 2 cents

OS 50 hyper to an OS55hz is about 15% power difference. The YS56 is maybe 20% better.

The OS SX to Hyper maybe 3-5%. I dont' think at your stage now it would be imperitive to get the best. The upgrade from a 30 to a 50 will be plenty to notice. Just make sure the internals of the motor are in good shape and the bearings are good.

Randy!!! I am the liquor

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01-03-2011 06:04 AM  7 years agoPost 3
stargazerww

rrApprentice

parkside, pa.

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thank you CORONAL

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01-03-2011 12:39 PM  7 years agoPost 4
steve 01

rrProfessor

Grand Rapids MI

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The only difference in the non hyper is the carb and head , all internals are the same

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01-03-2011 03:11 PM  7 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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And the performance comes from the carb. The head is more bling IMO

Andy
AMA 77227
http://www.jaxrc.com

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01-03-2011 04:28 PM  7 years agoPost 6
Santiago P

rrProfessor

South West, Ohio

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Like Andy said, the only BIG diference is the carb.

The stock OS50 carb suffers from a slight lean mid-range. There is an old spraybar modification you can do fix this, if it even bothers you (you gently file the low side of the cateye to allow more fuel).
https://rc.runryder.com/t62377p1/?h...ht=spraybar+mod

Another way to get around it is to run the low, pretty rich, but that can be a PITA.

Santiago

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01-03-2011 04:36 PM  7 years agoPost 7
stargazerww

rrApprentice

parkside, pa.

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well he let me know that the carb has been up graded to a
[ b-new 40E which is a hyper carburator]

looks like i am gettin a good deal here

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01-04-2011 02:51 PM  7 years agoPost 8
steve 01

rrProfessor

Grand Rapids MI

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I would agree the carb is more over the head considering the OS 55 upgrade heatsink head looks just like the original head from the non hyper and they upped the price to 100 bucks

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01-04-2011 03:57 PM  7 years agoPost 9
CoronaL

rrKey Veteran

Winnebago IL

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yeah I forgot about the carb differences. BUT, looking back, I'd say he should be perfectly fine. I think the main issue with the non hyper carb was that when really hard flyers could load and heat up the motor and then unload thereby coming back into the mid, it could get a bit lean. For MOST pilots, this wouldn't be an issue as they really don't load the motor up that much. Provided the needles are set correct to begin with, the old 50 should be plenty good.

Randy!!! I am the liquor

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01-04-2011 06:38 PM  7 years agoPost 10
stargazerww

rrApprentice

parkside, pa.

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cool i cant wait till i start this baby up thank you all for the advise very helpful. now im off to get the rest of the parts and a buddy of mine has a pipe for me that might work

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01-06-2011 09:44 AM  7 years agoPost 11
MartyH

rrProfessor

USA

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Grab that non-hyper 50. All you need is the hyper carb to make it a hyper. Ignore the head. Ignore modding the existing carb. For that matter, short of full 3D, the non-hyper will be perfect. It's a very nice engine.

Marty
http://www.martyhammersmith.com

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01-06-2011 09:13 PM  7 years agoPost 12
stargazerww

rrApprentice

parkside, pa.

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im running with it

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01-07-2011 03:06 PM  7 years agoPost 13
MartyH

rrProfessor

USA

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I think you made a good choice.

Marty
http://www.martyhammersmith.com

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