Leon Promet wrote:

Hi Marc,

I know Paul is going off line soon,  but I thought I might just sneak this
one in.

All the LATE model starter motors,  both manual and auto are basically the
same for the late model engines.  The REW manual starter has different
lower bolt centre,  but the offset is the same.

The bell housings will be a little thicker than the pressure die cast
factory ones so that they will be able to take the extra power of a
hot-rodded 20B.  Moreover,  strength rather than weight will be the design
goal,  as the whole aircraft will be hanging off this component!!  Failure
is NOT an option!!  However,  as they will be significantly shorter,  they
should end up being a bit lighter if anything.

The 20B also has an extra bolt hole on the top of the rear housing, so I
will incorporate that as an optional extra in the pattern as well.   If it
is not needed,  it can just be ground off at the time the castings are
being dressed up before machining.

The plan is to design the thing in such a way that it will be able to
accommodate both auto and manual flywheel/flexplate configurations. I also
intend to have a fully integrated solution which will include a 35 amp
permanent magnet alternator built into the aluminium driveplate that will
be an optional part of the kit,  (which will interchange with a standard
flex plate,  the ring gear being in exactly the same place).

I will be able to supply you anything from a bare bell housing to a
complete integrated solution that is ready to bolt up to whatever PSRU you
choose to use.  With the way our "South Pacific Rouble" is at the moment
(and probably will be for quite a while),  the prices will be real keen in
terms of USD.

I've been doing this sort of conversion stuff for 25 years,  so I have a
pretty fair idea what is required,  and as I have to solve the problem for
myself anyway,  you will get exactly what I will be putting in my own
plane.   I'm pretty fastidious when it comes to this sort of stuff,  so it
will be an extremely comprehensive, quality kit for a very reasonable
amount of money.

The beauty is that if the complete kit is purchased,  then all the *right*
hardware will be there,  with detailed instructions so that anyone who
knows the difference between an open ended spanner and a fork will be able
to assemble it. The complete kit will also avoid the necessity of people
getting involved in that frustrating game of "Mix and Match" (unless they
want to),  and trying to work out what starter goes with which flex plate
 etc.  If you just want the bare bell housing,  then fine.  All the
components will be individually priced,  and the price of whole kit will be
less than the sum of the parts.

Cheers,

Leon Promet

It will look something like this picture I took when I was down there but straight 
across (flat) where the starter mounts and motor mount beams on each side.

Paul Lamar
 
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