Paul, would it be better to weld aluminum o-ring collar for the PP intake tube to the outer housing instead of screwing and epoxy as seen in some of the drawings? ( i have the capability in house) long term/reliable bonding to aluminum with epoxy is a very tricky and questionable proposition. -jw

James Whitehurst

Well the stainless steel p-port tube is welded to the steel rotor housing.
No way of welding it to the outer housing which is aluminum.

For years people bonded in an aluminum p-port tube.
That was very problematic and un reliable. It would work for
a while and then it would leak. It would leak water into the combustion
chamber or just out of the block. We worked on this for months trying
to come up with a reliable way of doing it.

Welding in the steel tube was a major breakthrough. We now have about
200,000 hits on you tube. A very large number for a rotary video.

Here are some pictures from the old days when attempting to bonding it.

The new way with the bolted on block can be repaired. Just a matter
of redoing the silicon rubber or replacing the O ring.

You might try welding the outer block with the O-ring slot to the outer
rotor housing. But I would do that in stages to keep the rotor housing from
getting too hot and warping.

New Rotor housing are very expensive.

Paul Lamar

   How about using Al tube? Trim inside to match the rotor housing contour. Pull back a bit from the stainless and weld to the Al backing of the rotor housing. Then weld the tube to the outside of the rotor housing. Considering this is in a lower temperature area of the housing, expansion and contraction should not be a big issue.

   Dale Davies

   Yes that might work. Somebody with a junk rotor housing should try it

   Paul Lamar.

Tig welding should not be the problem. Need to build and install in a car to run it hard for a summer like track days. If it works out then try in an AC application. The Al tube could be pulled until a bit of coolant cavity is just showing. The weld would seal it. This way a bead could be put on the tube so that in a turbocharged application, the hose to the rest of the intake could not work off.

Dale Davies

Brilliant idea Dale. I think it will work.

Paul Lamar

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