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HelicopterEngines Plugs Mufflers Fuel › OS 91SX-H Review?
03-10-2003 09:54 AM  14 years agoPost 1
PatternFlyer

rrNovice

Frontenac, KS

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Hi, All,

I need some info regarding the OS 91SX-H.
I am trying to build a tuned pipe and header out of carbon fiber.

Was there any review of this particular engine in any magazine?
If so, which one?

I need specification such as timing periods listed as below link (review of 61SX-H WC).

http://www.osengines.com/reviews/osmg1963-rm.html

Any help would be appreciated.
Thank you,

Ihncheol Park

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03-12-2003 04:31 PM  14 years agoPost 2
dchinww

rrApprentice

Seattle, Washington

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Timing

Out of curiosity I measured the exhaust timing on my OS 91 before I installed it. It came out to about 156 to 158 degrees. Didn't measure any other timings.

I've never seen a carbon fiber header, this could be interesting.

Daniel

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