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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › OS C-spec vs C-spec pumped vs YS 91 st4
12-13-2004 02:30 AM  13 years agoPost 1
PAHelinut

rrVeteran

PA USA

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I just got my Raptor 90 and I was wondering wich engine would be best for it. C-spec pump or c-spec non pumped or YS 91 st4? Which one is reliable and has the most power?

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12-13-2004 02:37 AM  13 years agoPost 2
Secret Squirrel

rrKey Veteran

New Zealander living in Melbourne, Australia

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I really liked the C-Spec with Cline regulator, just a MAGNIFICENT engine on the MPII an unholy amount of power.

The OS 91 PS, has really upset me due to the leaning mid range problems.

The YS 91 is a great engine.

For me, it's down to the C-Spec with Cline or the YS 91. Either way is a winner.

Si

-------------
Simon Lockington

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12-13-2004 07:14 AM  13 years agoPost 3
greger

rrApprentice

Mesa, AZ

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I agree with simon, I have the c-spec, cline, viperhead combo and it is a great. Awesome power, easy starts and tuning, buy the YS if you don't want to buy the add ons.

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12-13-2004 10:24 AM  13 years agoPost 4
twiggs

rrNovice

West Midlands - UK

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I

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