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.
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