I have a rotor that have a 'C' on the gear side and a 'E' on the other. I was wondering if one side ment the wight or the other?

Thanks
~Luke

 

its a tolerance thing, atleast thats what ive been told

 

I've been told it allows you to match up the weights of the rotors and as long as you choose a letter on either side you should be fine. I'm just not sure which letter to use.

 

it refers to the wieght, did the rotors come out of the same engine? if so, did they both come from an engine that was last built by Mazda? A 13b rotor is not just any 13b rotor. Those letters are very important. Your letters should match if you want the engine to be balanced. (You do.) And also, make sure you have the correct counterweight to match those rotors, and flywheel too.

 

I dented one of the rotors that matched so I'm trying to find another. But i cant match it unless i figure out which letter to use on the rotor.

 

My guess is it's a C you need either a B C D to work safely.

 

"E" does not necessarily mean it's an English "E".
This was recently discussed in another thread.
The "E" is more likely the Japanese katakana "yo".


-Ted

 

So someone is telling me hi though my rotor? I wish they would of just sent me mail.

 

There was a post on here a couple of years ago where someone emailed either Atkins Rotary or Mazdatrix and asked this same question. The answer was that the rotors are not perfectly balanced and that they were all stamped "A" through "E" to show where each rotor fell in the range of "perfect" and "least tolerable". As long as the two rotors in an engine were within two letters of each other, they could be used together. Example is a "A" rotor and a "B" or "C" rotor can be used together, but not a "A" rotor and a "D" or "E" rotor.

Whether or not this is true I do not know. Its just what I read.

 

That's not Luke's problem. What he's saying is that on one side of the rotor it has a C, the other side has an E. He's asking, which side is the correct letter to use to match up his second rotor.

Luke, use the gear side (that's where they are located on my rotors).

 

Oh, he is asking about two different letters on the same rotor. I am on my computer in my garage (wireless network in the house) and I am putting together a motor right now. If I had better understood his question a few minutes sooner I could have looked at mine to add some better input. Sorry

 

Man, you guys are not listening.
It is NOT the letter "E"!


-Ted

 

Thanks Kyle, After looking over my post I do relize that my wording is a bit off.

 

I've seen other stamps on rotors before (not necessarily "E"). Who knows who has stamped what on on the rotors he has. I wouldn't necessarily say that what he is seeing is or isn't a real "E" without seeing them in person.

 

The letter to match is always on the gear side..And its the letter thats on position "3"of the rotor (99% of the time), the other 1% its marked on position "6",(probably when they were training someone to stamp rotors), each rotor is stamped 1-3-5 on the gear side, 2-4-6 on the non gear side.
The rotor he has is a "C", and the E as ted said, is "YO"...Max

 

Exactly.

 

Can't find the other thread. Just out of curiosity, what does this "YO" translate into in English?

 

Its just part of the katakana alphabet...

 

Nothing.
There is no direct English translation for these katakana characters.
Only Kanji (Chinese characters) might have English translation for single characters.

Short Japanese language lesson...
The Japan language is based on a "phonetic" alphabet.
The "hiragana" character set is "native", and the "katakana" character set is typically used for foreign word (i.e. English, French, etc.).
The hiragana and katakana set describe the SAME phonetic pronounciation, but the actual characters are difference - some are very similar.
Strings of these characters are used to make complete "words".


-Ted

 

Engine Building Tip thread