>
    > > Mikuni HRS48 is looking good. I'll mount the carbs close
   to the
    > engine
    > > for good idle and low profile and use a 25 inch long stack.
    > > Mikuni claims 120 HP per carb which is perfect for our use.
    > > If a Mikuni can live on a hog it can live on a rotary.
    > >
    > > If this works it is a major breakthrough for the rotary in
    > general.
    > > I would not be a bit surprised if it finds it way into car
    > racing.
    > >
    > > Mikuni is in my neck of the woods so perhaps I will hit
    > > them up for some test 48 mm carb loaners.
    > >
    > > Paul Lamar ...No rotor no motor.
    >
    > Hello Paul,
    > How are you going. I have been of the list for some time now
    > but dave
    > has passed on your email. I have mounted two Mikuni on the
    > renises for
    > my Mustang. I did not need to go to the bigger ones for this.
    > the best
    > price I found was from www.easternperformance.com
   .
    > all the flow rates are at another site.
    > What ignition are you going to use? i was looking at using the
    > same
    > system as the Jabiru uses on this. I have a Harley direct drive
    > alternator to mount also.
    > I have been working on the lightning with the 8 5100 Jabiru
    > engine in
    > of late but will go back to the Mustang again. I am a lot
    > happier now
    > that I have descended with the high pressure fuel supply.
    > I have also had this project on hold as the RAA in Australia
    > get its
    > new regs in place to include the Mustang
    > Regards Don
    >
    > --
    > Best regards,
    > ddunbar WA
    >
    >
    > We are doing fine Don. We just got a new Golden puppy.
    > BTW Robin and I might visit next month. I would like
    > to explore WA some more.
    >
    > Yes I know. Here are some old pictures you sent.
    >
    > Don't expect a lot of power if your using the Mikuni with the
    > side port RX8 motor. The hot tip is a p-port engine.
    > I would swap these for the 48's and p-port the engine. It is
    > real easy
    > now that Mark Steitle has figured out how to tig weld them in.
    > This is a piece of cake for the highly skilled people you have
    > over
    > there.
    >
    > You don't have to use the power and fuel burn if you don't need
    > it.
    > Also the extra power will pay off big time when cruising at
    > 10,000 feet because you are down to about 60% power anyway.
    > In other words starting with 240 HP at sea level you will
    > have 144 HP at 10,000 feet where the aerodynamic drag is
    > much much lower. Mount the 48's close to the block for a
    > better idle. Don't fool around :) Jump in! The water is fine :)
    >
    > Ignition:
    > A multi spark capacitor discharge ignition one per spark plug
    > has an advantage for a rotary as it will fire through a fouled
    > spark plug. If you burn any 100LL the plugs foul sooner rather
    > than
    > later.
    > If you use one per plug the RPM at which they fail to fire
    > multiple times is doubled as that number (about 4,000 RPM) is
    > given
    > for a four
    > cylinder engine that fires twice as often as a one rotor engine.
    > It will also fire a leaner mixture so you can cruise with a lower
    > fuel burn. MSD Part number 6200. Don't worry about the total
    > power consumption as each unit is using half the power as a four
    > cylinder
    > unit single unit would be using.
    >
    > The easy and simple way to trigger it is use two mag pick ups
    > mounted
    > 180 degrees from each other and make a new steel trigger wheel.
    > Mount the new trigger on the outside of the RX8 e-shaft pulley
    > as it is easier to fabricate brackets and clear the belts.
    > Thanks again to Mark Steitle for this tip.
    >
    > Fire leading and trailing plugs at the same time around 20 to 30
    > degrees BTDC.
    >
    > http://www.msdignition.com/ignition_4_6200.htm
    >
    > Paul Lamar ...No rotor no motor.
    >
    snips....


   Mikuni slide carbs and capacitor discharge ignition---I have the
   feeling that we (the rotary movement) have taken a very long and
   tortured path to get to this simple and elegant combination. I know
   I can get comfortable with this set up. Jerry

   Don't get too comfortable. I just checked on the price
   at my local motor cycle shop and the Mikuni 48 mm are $500 each :)

   If I had a dyno I would still be working on the slide throttle carb.
   If I can promote the loan of a couple of Mikuni's I'll test those
   on this P-port RX8 engine go around.

   Maybe Bill Jepson knows somebody and he can get a discount.

   Paul Lamar ...No rotor no motor.


snips....


Paul,

Very interesting information on the carbueration issue.  It would make
life so much simpler for us "unexperienced" types.  I have a couple of
questions.  First, if the carbs are gravity fed, how will leaning be
enacted? I'm assuming that original leaning took place by changing
control settings on the fuel pressure regulator.   Second, Burck, tell
me about your exhaust and muffler I see in the pictures.  Metals,
fabrication, etc?

Allen
Houston

I agree on that. The EFI systems are getting too complicated and
too costly.

We are still working on leaning. I think we can change the pressure
in the float bowl chamber somehow. Perhaps by using the low pressure
from an external venturi. Gordon also has some ideas along those lines.

Ken Welter runs a Weber and he has a scheme that
seems to work. I will have to dig it up and republish it. Also I have heard
of a gadget that raises and lower the needle valve in the float bowl that
works on Holley four barrel carbs.