Let me get this straight.........Steel tube TIG welded
to steel insert.......Then aluminum
insert with O-ring (s) to seal to the steel tube.......? A sketch would
be worth a thousand
words for the engineering challenged........
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Original message from "George Lendich" <lendich@optusnet.com.au>:
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Rusty,
I Heard similar stories, but am
sure Lynn is correct in that, if their done correctly their OK. The one's
I seen weren't so good.
The new method of welding to the steel liner,
eliminates any possible leak. I originally suggested welding to the inner
and outer aluminium, but someone suggested that wasn't feasible, as it was
too difficult to get access to.
So Tig welding to the steel liner is good
but you have to use a steel tube - which you can't weld externally. So I
came up with a method of Tig welding a aluminium tube and flange to the
exterior, which has an O ring seal to the steel tube, and passed it by Bill
J. who felt it was a good idea. Probably could use a couple of O rings
if you felt like it. The advantage of this is that the O ring will allow for
differing expansion and contraction rates which might put stress on the
inner tig welding. Am elegant solution IMHO.
On the side ports, your suggestion would be
OK.
Of course the factory PP were integral to the
injection casting.
George ( down under)
Greetings,
One of the things
that's always bothered me about making a PP housing is leakage. I've
heard very experienced folks say that eventually, any PP housing you make
will leak, and it's easy for me to imagine that happening. I
don't think I've heard the same thing about factory housings though.
How are the
ports installed in the factory PP housing?
The other problem
with a conversion is the side ports. I know people fill these with
their favorite epoxy, but I'd worry about that coming loose, and getting
into the rotor. How much would it hurt the PP operation if you
just sealed the ports on the outside of the side housings with a plate
where the intake would have been?
Cheers,
Rusty