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Old 02-27-2008, 08:43 PM   #1
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Default OS .21 question

just wondering what the difference is between the OS max VZ-B v-spec with the black body and the OS max VZ-B with the aluminum colored body.. i picked one up and was just curious the difference like power, longevity, parts availabity????also notice that the cooling heads are different
thanks for any info
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Old 02-27-2008, 09:39 PM   #2
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the vzb v-spec is black, is it a VZR that is silver with the different head?
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Old 02-28-2008, 04:40 AM   #3
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right on the side of the body it says os max vz, and on the head it says vz-B
here's a pic
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Old 02-28-2008, 05:06 AM   #4
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http://www3.towerhobbies.com/cgi-bin...=OSMG2067&P=PU

O.S. 21VZ-B (P) Rear Exhaust w/20L with revised Carbi.

Pretty sure thats what it is but with a later model carbi on it.
More then likely an onroad engine.
Probably one of their first revisions looking at the ribbing on the lower crank case.
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Old 02-28-2008, 07:06 AM   #5
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The VZ-b is the predecessor to the V-spec. They are very similar internally. The VZ-b has a standard head button (not turbo plug) and slightly different timing. They are so close that the internal parts are all interchangeable.

OS off road engines always have a "b" in their name and the on road engines are always "r". A VZ-b is an off road engine, the VZ-r is the on road model.
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Old 02-28-2008, 09:43 PM   #6
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thanks for the info....the tower hobby link is right on!!! exact match.

you guy's never cease to amaze me. there is always someone with the info.
just the reason RCTech is here!!!
Thanks again
Mike
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