1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

can you use 87 turbo rotors in a 12a

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Old Apr 23, 2008 | 07:55 PM
  #1  
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From: colorado
can you use 87 turbo rotors in a 12a

i think its kind of a retarded question but i thought it is worth a try lol
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Old Apr 23, 2008 | 08:18 PM
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nope..too wide..if you used them, you would have a 13B.
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Old Apr 23, 2008 | 09:44 PM
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No, if you used them you have a locked up motor!!! lol
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Old Apr 23, 2008 | 10:37 PM
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The rotors and rotor housings are differant widths between the 12a and the 13b. I may be way off on my figures, but I believe its something like 70mm for a 12a and 80mm for a 13b. This is actually one of the ways mazda was able to make the 13b outperform its 12a brethren.
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Old Apr 23, 2008 | 11:16 PM
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Originally Posted by ForsakenRX7
The rotors and rotor housings are differant widths between the 12a and the 13b. I may be way off on my figures, but I believe its something like 70mm for a 12a and 80mm for a 13b. This is actually one of the ways mazda was able to make the 13b outperform its 12a brethren.
I think its 60 and 70.
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Old Apr 24, 2008 | 12:56 AM
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I think you're smoking something, dj.

Let me ask you this. How thick is the intermediate plate?
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Old Apr 24, 2008 | 01:19 AM
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why not just get a t2...
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Old Apr 24, 2008 | 01:21 AM
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Oh noes a Jeff20B trick question.

Its the internetz and I can't even tell if you are saying I am right or wrong

umm. I know you know but I am not that knowledgable yet. I would guess 35mm
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Old Apr 24, 2008 | 01:22 AM
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nope there too wide they will not fit...the rotors that is
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Old Apr 24, 2008 | 01:54 AM
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12A 70mm
13B 80mm
intermediate plate 50mm (important to know when considering multi rotor engines)

A 17A (3 rotor 12A) is 120mm longer than a 12A and 100mm longer than a 13B. This is because a 13B is 20mm longer than a 12A. Class dismissed.
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Old Apr 24, 2008 | 01:56 AM
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Originally Posted by Jeff20B
I think you're smoking something, dj.

Let me ask you this. How thick is the intermediate plate?
Isn't it 50mm wide? I'm pretty sure it is.

70mm for 12a rotors and 80mm for 13b.
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Old Apr 24, 2008 | 01:57 AM
  #12  
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^^ my bad. I type slow
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Old Apr 24, 2008 | 01:58 AM
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Well ****.
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Old Apr 24, 2008 | 04:38 AM
  #14  
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Sure You can turbo rotors in the 12A, but You'll ned the heavy duty stud set from MazdaTrix because it requires a bit more torque to bolt it together
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Old Apr 24, 2008 | 06:21 PM
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Originally Posted by djessence
I think its 60 and 70.
actually i think it is 70 and 80... not to argue. *edit* [i should read all the posts before i type...]
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Old Apr 24, 2008 | 07:09 PM
  #16  
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yea i ate my words.
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Old Apr 24, 2008 | 07:56 PM
  #17  
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From: Crystal MN
You can,but you the only thing you can use of your 12a is your iron's
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