George Lendich wrote:

Hi George :-)
Out of about 6 12A engines we have taken apart we have not found a

single end

housing with any measurable wear.  We have seen several of the 13B's

with the wear

you mention.
Don't know if Mazda used a different process on the different engines,

or if just

later on the B's.
We have some second gen housingss, (B'S) that are severely worn in

several areas,

but a first gen set that shows no wear. Saw some second gen housings at

Tracy's

that were worn the same way.
Hard anodized aluminum is not a coating, but a process that changes the

metal

properties. It creates aluminum oxide, the same material some sandpaper

is made

from.  It will cut steel in the sand paper, grind stone form.  In that

form it is

grainy like grains of sand. In the polished state it is smooth as

polished stone,

in effect it is a sort of polished stone.  It's hardness is rc 65 and

greater,

depending on the process.
Hard anodizing is .002 thick or greater, 1/2 of the process is under the

surface

and the other 1/2 grows on the surface itself.
The Det gun process sprays the material onto the surface at such

velocities that

some of the particles are embeded in the metal itself. The others cling

to the

surface. Carbide can be used for severe hardness.
Hard anodizing is part of the metal itself.

You should have come to sun n fun, :-), you would have been able to see

the

models/patterns of the components.  (kinda hard to explain this without

you

looking at the pieces) The inlet is a P-Port. It uses the factory

exhaust port as

the intake port. The exhaust ports are in the end housings, and are in

the thick

piece of the housing. No seals are needed.

The end plate gaskets are just a gasket between the plates, a leak here

is no

different than a leak in the cooling circuit anywhere.  The plates of

the end

housings have the coolant passages in the housings and they are not

exposed to the

combustion chamber or the sump any differently than they would be in the

factory

engine.
The coolant and oil circuits are the same as the factory circuits.
Hope that helps you out.
Royce

Royce,

Thanks mate, yep I'd love to have been at Sun and Fun to see everyone
including my Vision mates, but only just returned from 3 months in the USA
leaves me a little short of cash, so maybe next time.

I had forgotten you were P.Porting - solves a problem !!

Maybe your right on the wear pattern, it was mostly 13bs I was looking at,
however that is what Paul and the others are using anyway.

You seem convinced that the surface treatment will work, I can only say
"give it a go" and see what happens, that's what experimentation is all
about. I'm sure were all keen to see some results.
George (down under)

 
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