Housing tolerance

sen2two · 05-09-2013, 04:09 PM

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

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

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?

05-09-2013, 04:09 PM	#1
sen2two KTEC Join Date: Jan 2009 Posts: 642 Rep Power: 0	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. __________________ what I have: 1985 Gs:12a All motor Drag car - 1973 Rx2: Play car What I had: 93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2