> snip.....
> >
> > > > > > > > > >>"Brian D. Cain" wrote:
> > > > > > > > > >>
> > > > > > > > > >>
> > > > > > > > > >>>An 86 Non-turbo rotor? I believe they're the same
> > > > > as the 87
> > > > > > > > > >>>and 88
> > > > > > > ones,
> > > > > > > > > >>>correct? 9.4:1 compression? I'll see what
> > I can do today.
> > > > > > > > > >>>What
> > > > > > > weight
> > > > > > > > > >>>code
> > > > > > > > > >>>range do you need?
> > > > > > > > > >>>
> > > > > > > > > >>>B
> > > > > > > > > >>>
> > > > > > > > > >>>Brian D. Cain -/- Grand Prairie, TX -/-
> > bdc196@comcast.com
> > > > > >
> > > > > > > > > This note is for Brian Cain.
> > > > > > > > > Hey Brian you made a comment above about a
> > weight code for the
> > > > > > > > > rotor. This sounds like a perfect opportunity to
> > > > > expound upon our
> > > > > > > > > ever increasing knowledge of Rotary. What
> > weight code were you
> > > > > > > > > refering to? Is there any markings on our
> > engines that show a
> > > > > > > > > weight code? I am particularly interested because it
> > > > > would make an
> > > > > >
> > > > > > > > > inference to matching rotors for building engines
> > > > > from parts. Can
> > > > > > > > > you enlighten us? Doug Mueller 13BT RX-6
> > > > > > > > > N900DM
> > > > > > > > > Henderson,NV
> > > > > >
> > > > > > "Brian D. Cain" wrote:
> > > > > > >
> > > > > > > Hey Doug,
> > > > > > >
> > > > > > > There's a weight code, to five varying degrees labeled
> > > > > "A" through "E"
> > > > > >
> > > > > > > (where weight code "A" is the heaviest), stamped to
> > every rotor on
> > > > > > > their gear side I believe. They're difficult to see on a
> > > > > dirty rotor,
> > > > > >
> > > > > > > but once you give it the spit 'n polish treatment,
> > > > > they're plain as
> > > > > > > day to see. According
> > > > > > > to the factory shop manual, when assembling an
> > engine, the weight
> > > > > > codes
> > > > > > > must be referenced. The rule of thumb is you
> > cannot use a pair of
> > > > > > rotors
> > > > > > > where the weight codes are two weights out: For example,
> > > > > if you have
> > > > > > a
> > > > > > > "B" weighted rotor, and then your rotary engine buddy
> > > > > down the street
> > > > > > > gives you a "D" weighted rotor, they're not
> > supposed to be mated.
> > > > > > But,
> > > > > > > if he notices he has either an "A" or a "C"
> > weighted rotor, then
> > > > > > either of
> > > > > > > those can be used. I'm not sure of the difference in
> > > > > weight between
> > > > > > "A"
> > > > > > > through "E" but I believe it's within grams of one another.
> > > > > > >
> > > > > > > The factory rotating assembly is quite well balanced from
> > > > > the factory.
> > > > > >
> > > > > > > Aside from the issue of the eccentric shaft not
> > having a centre
> > > > > > > support to ride on, the engine can be spun very
> > high up from the
> > > > > > > factory (8500+rpm). In any event, make sure you use
> > a weight code
> > > > > > > that's atleast within one letter difference, if not
> > the same.
> > > > > > >
> > > > > > >
> > http://bdc.cyberosity.com/pictures/MarioTrevino/EngineRotors1.Jpg
> > > > > > >
> > > > > > > B
> > > > > > >
> > > > > > > Brian D. Cain -/- Grand Prairie, TX -/-
> > bdc196@comcast.com MSN
> > > > > > > bdc196@hotmail.com, Yahoo! bdc196, AOL Symajhi, ICQ# 1733105
> > > > > > > http://bdc.genxracing.com
> > http://groups.yahoo.com/group/fc3s_org
> > > > > > > http://groups.yahoo.com/group/HaltechSupport--
> > > > >
> > > > >
> > > > > > That is very good to know, Brian, I never heard of that
> > > > > before. If its
> > > > > > in my shop manual I must have missed it. The four rotors I
> > > > > have are all
> > > > > > stamped "D". If I had to buy a new rotor from Mazdatrix I
> > > > > wonder what
> > > > > > weight they would provide.
> > > > > >
> > > > > > Chuck Dunlap
> > >
> > > > Chuck,
> > > > I just opened the box to the rotor that I was going to
> > send you - the rotor is weight code 'C'. Do you want this one or do
> > > you want to find a 'D' code rotor?
> > > >
> > > > Ken Powell
> > > Chuck, I'll look at the rotor I have and determine if its a
> > D. I'll let you know. Tom Weber
> OK, I'm going to wait until tommorrow to see if Tom or someone else can come up with a 'd' code rotor. Might as
well keep things as much in balance as possible.
>
> Ken P.
I just mailed the rotor, just in case Chuck needed it sooner rather than later. Ken P.
"Powell, Ken" wrote:
I just mailed the rotor. Ken P.
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