Rotary Engine Building, Porting & Swaps All you could ever want to know about rebuilding and porting your rotary engine! Discussions also on Water, Alcohol, Etc. Injection

Rotor Weight ?

Thread Tools
 
Search this Thread
 
Old 03-29-2004, 10:33 AM
  #1  
Senior Member
Thread Starter
 
GMON's Avatar
 
Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
Default

Ok so I found a balance in the attic and started going through my rotors. None of the pairs matched from the factory were even close. One of my rotors ate part of an apex seal so I need to find it a new partner. I ended up finding one that was very close in weight. Does anyone have any suggestions on how I could remove some material from the rotor to get them dead on.



Also, Any info on balancing the rotors? I was thinking of hanging the rotor from the center of two of the corner seals and on the third using a scale to take readings of the different apexes. Then you just spin it arround till you have all the info then remove some material and retest.....Thoughts...





Gregory
GMON is offline  
Old 03-29-2004, 12:53 PM
  #2  
Senior Member
 
1Revvin7's Avatar
 
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Default

What were the weight #s you got?
1Revvin7 is offline  
Old 03-29-2004, 02:11 PM
  #3  
Senior Member
Thread Starter
 
GMON's Avatar
 
Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
Default

I just did the balance thing. The scale part of the balance does not go that high



Gregory
GMON is offline  
Old 03-29-2004, 03:45 PM
  #4  
Senior Member
Thread Starter
 
GMON's Avatar
 
Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
Default

The rotating assembly on this engine (from mazda) had a B and an E. The E is heavier than the B. What gives? And yep they are spotless. The E is 1.5 side seals heavier than the B.



Gregory
GMON is offline  
Old 03-29-2004, 05:46 PM
  #5  
Senior Member
 
j9fd3s's Avatar
 
Join Date: May 2002
Location: California
Posts: 22,465
Default

Originally Posted by GMON' date='Mar 29 2004, 01:45 PM
The rotating assembly on this engine (from mazda) had a B and an E. The E is heavier than the B. What gives? And yep they are spotless. The E is 1.5 side seals heavier than the B.



Gregory
unless you have a peice of papre that says something different the letters (a, c, e etc) dont mean anything. as far as mazda is concerned they have a part number for an application (ie all s4 na rotors are ithe same) and they are all interchangeable
j9fd3s is offline  
Old 03-29-2004, 07:27 PM
  #6  
Senior Member
Thread Starter
 
GMON's Avatar
 
Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
Default

https://www.nopistons.com/forums/index.php?...pic=22992&st=25





Look at the post by BDC. I hope he will chime in and tell us where he got that info.



Gregory
GMON is offline  
Old 03-30-2004, 12:25 AM
  #7  
Senior Member
 
Kathy Atkins's Avatar
 
Join Date: Mar 2004
Location: Tacoma, WA
Posts: 179
Default

Use a postal scale and try to get the weights matched perfectly for optium use.



mazda does have a scale of being able to use some letters with others, I would need to check my tech manual at work for the proper sequence. But the rotors can vari with in the letter types.



Hope I didn't confuse the issue
Kathy Atkins is offline  
Old 03-30-2004, 01:28 AM
  #8  
Senior Member
 
'79rx7's Avatar
 
Join Date: Sep 2002
Location: Joplin, MO
Posts: 603
Default

the rotor are different there is B, C, D, E



they can be no more than one letter off from each other, like:



b, b or b, c

c, c or c, b or c, d

d, d or d, c or d,e

e, e or e, d



hopefully that makes sense the best rotors to have are either C or D cause they work with a wider range of rotors...
'79rx7 is offline  
Old 03-30-2004, 01:35 AM
  #9  
Senior Member
 
1Revvin7's Avatar
 
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Default

My B weight rotors were off by the weight of a 1/3 or so of a sideseal
1Revvin7 is offline  
Old 03-30-2004, 10:12 AM
  #10  
Senior Member
 
j9fd3s's Avatar
 
Join Date: May 2002
Location: California
Posts: 22,465
Default

where is this written down in a mazda manual?
j9fd3s is offline  


Quick Reply: Rotor Weight ?



All times are GMT -5. The time now is 05:35 AM.