Carol Conner wrote:

Hi, Paul.....Paul Conner here....I have to ask another dumb question.
Unfortunately, I am only familiar with carburetors and fuel injection is new
and intimidating to me.  On my 13B engine, for some reason, it has 2
injectors that apparantly inject fuel directly into the "cylinders", and 2
more injectors in the intake manifold about an inch from the engine, and
then the FM200 also is an injection system?   How many injectors do you need
on a 2 rotor engine?  I think I mentioned I have Tracy's electronics, and I
was wondering if I can get away with just using the 2 injectors that go
directly into the center housing between the two rotors, or do I actually
need additional injectors in the manifold?
      Thanks in advance for your reply.....At times I think I should just
buy the Deloroto carb and manifold, as I understand how they work, but I
like the advantages of fuel injection.  Paul Conner, Mobile, AL

No such thing as a dumb question. In theory only two. In practice four are
used. In the street car it is for wide dynamic range. In other words
good control of the amount of fuel injected over a wide range
of engine speed and engine power. EFI injectors are not all that
good when asked to deliver a very wide range of fuel quantities.

In aircraft use Tracy uses four electronic injectors to have some backup.
On the other hand it might not idle so well if he only used two.
It would probably run however on only two with sufficient capacity.

In the Airflow Performance unit they probably use four because it was
probably designed for a four cylinder engine.

Paul Lamar
 
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