> We now have Mazdatrix dyno runs on the 2 inch steel tube welded
   RX8 p-port
    > engine.
    >
    > Far more torque and HP than the RX8 high power engine in the
    > 6000 to 7500 RPM range. This is the range we use with the 2.85:1
   PSRU.
    > This had a 52 mm Weber carb which unfortunately is smaller
    > than the 58 mm Weber carb we used on the 2nd gen p-port engine
    > dyno runs. The 52 mm carb is showing signs of being too small.
    >
    > The 2nd gen P-port engine is now running in Mark Suspinski
    > Mustang II. Hopefully that will fly soon.
    >
    > Dave Lemon commented that the engine had extraordinary stand off
   fuel/air mist
    > above the carb with the stock RX8 exhaust manifold. This is to be
   expected
    > as organ tuned p-ports don't like exhaust back pressure. We use
   ram air
    > plenum's
    > so this is not a problem for us. A supercharger exhaust manifold
   and stright
    > through
    > muffler reduced the stand off and increased the power. Dyno run B.
    >
    > More pictures on Monday and perhaps a video of the engine running
   on the dyno.
    > --
    > Paul Lamar ...No rotor no motor.
    >
    >
    > Congrats Paul, Can't wait to see the video! How well will this
   work with
    > the 6 port?
    >
    > Rick in Alaska
    >
    > That is the six port RX8 engine.
    > The four port version is no longer made anyway.
    >
    > Paul Lamar

   Paul,


   Congratulations.  235HP on the first few tries is pretty good.
    Better than
   the standard setup at 220 or so.  Our you going to try fuel injection in
   which case the hp should get even better?

   Doug in Japan.


   I think we can get a bit more with the 58 mm carb. I am going to try
   to talk Dave into taking the 58 mm off his race car engine and
   installing
   it on the RX8 p-port engine. We got about the same HP we got last
   year with
   the 28 inch runners and p-port exhaust. Probably within dyno error.

   I suspect we are a bit long on the runners. I think 24.5 inch will
   give us
   more of what we want. Here are the curves from last year.

   I am going to fool with the mechanical fuel injection off the dyno
   and on a test stand
   until I have it working pretty well and then I may put the engine
   back on the dyno.
   --
   Paul Lamar ...No rotor no motor.



Now that you have dyno numbers with a carb, if you can run the engine on
a test stand with the same carb/exhaust setup, you'll be able to get at
least a rough estimate of your success.


Matt-


I think you mean "on a test stand with the Mech FI  setup".

Yes. I don't see why the Mech FI should hurt.

Paul Lamar ...No rotor no motor.

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