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01-14-2009 02:38 AM  9 years agoPost 1
mbkite

rrVeteran

usa

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For the vibe 90 what engine would be best c spec sz hz st or sr.
rpm head speed to geer ratio.?
thanks

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01-14-2009 06:01 AM  9 years agoPost 2
MANCHA

rrVeteran

Cabo San Lucas, Baja- Mexico

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YS, black or red heads !
keep it lite !!

MANCHA

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01-14-2009 06:22 AM  9 years agoPost 3
Jason Adamo

rrApprentice

Port Charlotte Fl

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O.S 91 hz ps all the way

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01-14-2009 09:09 AM  9 years agoPost 4
Viberheld

rrApprentice

near Frankfurt, Germany

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For more Power: YS 91 SR
But Fuel consumption and Vibrations are very high!

For a smoother Engine run and less fuel consumption, take a HZ or HZ-PS.

I prefer the OS.

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01-14-2009 02:00 PM  9 years agoPost 5
JRjoe

rrElite Veteran

Jonesville , IN USA #1

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YS 91 SR

I'm a big fan of the YS motors. Not so much because i think it's better than an OS but more so because i've had nothing but good luck with YS. No complaints here...


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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01-14-2009 02:42 PM  9 years agoPost 6
DWS6

rrKey Veteran

Newark,DE

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stay away from the cpec and SZ as they require mods to get them to run well. The HZ is proving itself very well and I really like how mine is running. Nothing like my old SZ. Cant go wrong with the YS-SR either.

I would keep the SR under 15,500rpm for long life. I know a guy who ran his at 15,878rpm and the rod eventually snapped.

The HZ likes the rpm in the range of 15,400-15,744rpm. it makes peak power at 15,000.

I am not up to speed on the Vibe 90 gear ratio's so I cant help you there.

Dave Williams
Team Align

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01-14-2009 02:47 PM  9 years agoPost 7
colsy

rrElite Veteran

Cambridge, UK

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If you're buying a motor, i would go for a SR, my vibe has a SZH-PS but it's temperamental to say the least, all my other 90's are SR'S and have been trouble free!!

Col.

Only Quote From Experience.

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01-14-2009 02:52 PM  9 years agoPost 8
DWS6

rrKey Veteran

Newark,DE

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Col,
just looked at your profile, I think you need councelling. To many heli's!

Dave Williams
Team Align

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