Paul Conner wrote:

Hi, Paul.....I have been pondring my 13B installation in my SQ2000. I have
Tracy Crook's electronic ignition controller and fuel pumps.
     I noted on the Atkins Rotary site that David has for sale a Weber carb
system with air filter, intake manifold, etc for around $750.00, and it is
available with a straight or side draft manifold.
     Are you familiar with this setup, and if so, would it have a mixture
control similar to a certificated carb?  Would it need provisions for carb
heat?  I kinda like the KISS principle (With a carburetor, it is a simpler
setup? (One facet electric fuel pump would probably be adequate as on my
previously owned LongEZ).
      How much horsepower and/or reliability might I have to give up over a
fuel injection system, and lastly, (sorry for so many questions at once)
possible advantages/disadvantages of both the fuel injection and carb
setups.
     Thanks in advance for your reply.  It is great to have someone like
yourself to assist the newcomers to the rotary enthusiasts.  Paul Conner

As far as I know there is no way of leaning a Weber internally at high altitude.
Ken Welter has some external trick along those lines. Perhaps he can explain
it again for you. 
 
Most Weber manifolds are tuned for 8000 RPM and up.
Yes you will need provision for carb heat and the FAA inspector
will not sign off your airplane unless it has carb heat.

The sea level  HP given up will depend on the PSRU gear ratio chosen.
None at all or maybe even quite a bit more if you have a 2.85 or 3:1 psru ratio 
a street port and you run the engine up to 7500 to 8000 RPM for takeoff.

Paul Lamar
 
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