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-   -   Housing tolerance (https://rotarycarclub.com/showthread.php?t=17347)

sen2two 05-09-2013 04:09 PM
Housing tolerance
 
I read somewhere that rotor housings have a tolerance of .003" for warpage. Does this mean they are allowed to be .003" out of parralell?

And I could not find a tolerance on thickness... Anyone know it?

Reason is, I am planning to machine a set of 13b housings to 12a width. And I just want to be sure of the tolerance allowed.

RICE RACING 05-09-2013 04:57 PM
Quote:
Originally Posted by sen2two (Post 243236)
I read somewhere that rotor housings have a tolerance of .003" for warpage. Does this mean they are allowed to be .003" out of parralell?

And I could not find a tolerance on thickness... Anyone know it?

Reason is, I am planning to machine a set of 13b housings to 12a width. And I just want to be sure of the tolerance allowed.
No it's thickness to thin from the top to 3 different spots around the spark plug holes and just below (where it gets hottest) and 'stretches the most' especially when overheated!.

If the rotor housing is too thin in this zone it will do water seals basically. And is an A typical sign of a motor that has been BDC'd

sen2two 05-09-2013 05:43 PM
Quote:
Originally Posted by RICE RACING (Post 243246)
No it's thickness to thin from the top to 3 different spots around the spark plug holes and just below (where it gets hottest) and 'stretches the most' especially when overheated!.

If the rotor housing is too thin in this zone it will do water seals basically. And is an A typical sign of a motor that has been BDC'd

lol... classic


So what would be the tolerance for keeping it parallel to either side?

And what would be the thickness tolerance (+/-)? would there be any benefit in making it a few thou thinner or thicker?


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