Hey paul
Just reading about the hi temp epoxy issues. Now I'm not doing a p-port on

my engine

so forgive me if this doesn't make any sense. Is there any way to use a

roll pin or

spring pin to hold the intake tube into the side of the housing if you

could pin it

you would only need the epoxy to back fill any gaps better yet would be a

press fit

with a pin. You wouldn't need much say 1/16 or 1/8 in pin drilled through

the side of

the housing through the port tube, bang the pin in. When you reassemble

the engine

the pin is sandwiched like everything else. There would be no way for it

to come out.

I can only guess as to the amount of turbulence the pin may cause but

being so small

it may be negligible. I'm sure the hi tech epoxy's are wonderful stuff but

reading

what you guys want to do with it. You may be asking it to do more than it

is designed

for. A better solution might be finding a way to keep that tube in there

with a real

piece of metal maybe a tube with a collar on it or some sort of L bracket

there has

to be a better way to secure that into the engine. here are some autocad

drawings not

to scale.

Tony

There have been dozens if not hundreds of p-port engines built like
this in the last 30 years and they give no trouble. Some p-port
3 rotaries are making 1200 HP with bonded in tubes. Epoxy is good for
about 3,000 pounds per square inch shear load.

Paul Lamar

Tony/Jerry,
Advice to me is that there has been some problems with the epoxy breaking
down over time. I believe this is from the racing people here in Australia -
but who knows what they used!
Suggestions have been press-fit and back-fill with epoxy or even threaded
and back-fill with epoxy.
Unsure myself FWIW.
George (down under)

I am not surprised if it breaks down in about 10 years.
Most plastics go away in ten years. You can always weld
a tab on the tubes and drill and tap the rotor housing
for a couple of 10/32 machine screws. One on each side of
the tube. Here is the way Power Sport did it using small
studs.

Paul Lamar

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