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HelicopterEngines Plugs Mufflers Fuel › Max confusion!
10-24-2004 01:58 PM  13 years agoPost 1
Heli88

rrKey Veteran

Clarkston, MI

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I'm thinking about going with an O.S. 91 in a Raptor 90.

I'm a bit confused about which one to get, the SX-H, C-SPEC or the C-SPEC w/pump?

I'd want to get the one that will run good out of the box. I really want to set it and forget it like my O.S. 50.

Thanks!

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10-24-2004 03:12 PM  13 years agoPost 2
Colibri

rrKey Veteran

The Netherlands

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Forget about the old SX-H. It is known to vibrate and called the Jack Hammer for a reason. Take the CSpec with or without pump. Or an YS91ST. Whichever brand you prefer, both are good engines.

Tim

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10-24-2004 03:39 PM  13 years agoPost 3
3dfreya

rrNovice

Greenville,S.C.

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I recommend the C-spec with the 3 needle carb and no pump.Its alot easier to tune and you'll have less problems with it.The pumped version only has 2 needles and also needs the restricter valve to work good.

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10-24-2004 03:44 PM  13 years agoPost 4
jb_turner

rrElite Veteran

USA

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I have and run SX-H and it is smooth. If not set up corrreclty it will (as any motor) not run right... it is a matter of set up.

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10-24-2004 07:29 PM  13 years agoPost 5
Comanche Man

rrVeteran

U.S.A.

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Hey, I would reccomend the os 91 c-spec ps (pumped version) most likely will run fine out of the box, and will have lots of power and torque

Fear my name on Xbox live

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10-24-2004 07:32 PM  13 years agoPost 6
flyinghotwheels

rrApprentice

Holt, MI

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No such thing as set it and forget it with a OS 91 C-Spec PS. YS it!

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10-24-2004 07:41 PM  13 years agoPost 7
mrNoodles

rrProfessor

Borlänge, Sweden

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Quite many seems to get the third needle when using a OS PS.
With that I would´ve choosed that one from the three you decinding between.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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10-25-2004 01:38 AM  13 years agoPost 8
Comanche Man

rrVeteran

U.S.A.

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my os has ever really had a consistancy problem, and didn't have anything but a lean idle

Fear my name on Xbox live

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