Recently the question came up about fuel injector location. Near the port
or near the start of the intake runner. Mazda did some experimentation
with this during the development of the Lemans engine.
As you can see in the RPM ranges of aircraft use there is little difference
in throttle response. Mazda choose the near-the-port configuration because
this was a road racing engine and good low RPM throttle response out weighed any 
advantages in fuel vaporization. As both Mecanair and Racing Beat have 
discovered the fuel consumption for a given HP is lower with the injectors
out near the start of the intake runners.

This half page is from Mazda SAE paper 920309.

Paul Lamar
 
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