Paul

Getting a quote for some oval tubing for the intermediate ports.
right now it will be just straight oval tubing in lengths of 6ft
the oval is custom extruded for the inner ports. Material is 6061 with a
.065
wall. the tubing can be mandrel bent into a round any thoughts for the
bend
profile? I initially will bend it at a 3":in
radius but the idea is to keep the manifold as alow a profile as possible
like
Mistral has done.

Have you seen DR Gas?

www.drgas.com
click on the oval tubing catalouge this is an idea of what can be done.
with
oval tubing.

tony

To work well the oval cross sectional area must be the same as the round
area.
Merely flattening a round tube won't work for an intake manifold.

Paul Lamar

Tony,

I couldn't find a reference to material they offer but it appears these
are  for exhaust systems and as such is a good find.  Thanks

 http://tinyurl.com/2lhpej



DougFir

This is how our intake ended up. Milo

Milo,
Are they just cones you have welded on to the intake tube - will they do the
same job as the bell shaped ends. The sharp edge will ( I believe) cause
some turbulence of the intake
George ( down under)

George I think you are right. With the bell mouths the runners are 15.75
inches long. We will be running on an un instrumented test stand first, so
this is our first attempt. If we can get @200hp out of our RX-8 engine, we
will be delighted. Heck, we do not know if the engine will even run yet,
lots of work ahead of us. Milo

15.75 inches is too short for 6500 to 7000 RPM Milo.
What you need is 25 to 28 inches.

I don't think you will see anything near 200 HP at 6500 to 7000 RPM.

However if you want to test it on a dyno the Mazdatrix dyno is
set up for rotaries.  You just bolt them in and run them.

As far as I know the Mazdatrix and the Racing Beat dyno are the only
ones set up for rotary engines in the US. Most other rotary shops use
chassis dyno's. I could be wrong but I have yet to hear of one.
If anybody knows of other engine dynos set up for rotaries please let
me know and I will pass the info on the next time the subject comes up.
Power Sport had one but I don't know what happened to it.

Paul Lamar ...No rotor no motor.

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