George Lendich wrote:

Paul,

I'm in the middle of doing a bellhousing 12A/ 13B and have used your drawings to confirm my own
calculations - pretty damn close !!
I've found however, that working in millimetres is a little easier as the boltholes (from centre)
are 182mm and the odd one being180mm.

I checked with my auto electrician mate and he advised me the lightest/smallest Mazda starter is
the 86/91 - is that the one chosen ? - as it just fits in to my bellhousing .
I suppose I could move it down a little to give a little more room.
Another problem is the auto flywheel fitting in my bellhousing, it may or may not fit at present
as I've had to cone/ slope the sides to allow for moulding - thus reducing the area. The best
scenario will be I will have one millimetre
around the auto flywheel, the worst scenario will be it won't fit.

If worst comes to worst I will have an aluminium manual flywheel centre made. I can have an
aluminium copied from a manual lightened one, that should look nice.

However if it does fit, I have limited room for the starter, that's why I need to know if the 86
to 91 is the correct one.
Thanks mate.
George (down under)

BTW I was given the shrinkage rate of aluminium as, 1 in 77, which is pretty close to what you
suggested.

I think the 89 to 91 is the best so far. I am waiting to see the RX8 starter
and bell housing. I sure hope it is not as complicated and expensive as the third gen.

If your bell housing works I might be interested in buying one.

Paul Lamar
 
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