VO wrote:

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.

Do you have any details on they research and results?
It is strange discovery. Mixing well? But with low RPM
and cold runners tubes could be evaporation (moisture)
on the intake runners walls ... Please comment.
Thanks
Vlad

N1UT - Velocity Elite, RG, Mazda 20B rotary, NA - in progress
http://www.N1UT.velocity-air.com

Just what I uploaded Vlad. As I said airplanes spend 99.9% of the time
at 150HP and up. That is a lot of airflow through there. If you don't
care about the last little fuel efficiency put them where Mazda
put them. Nobody is twisting anybody's arm on this. I myself
will try them out near the runner bells and live with whatever
throttle response I get. A carb at the end of a long intake manifold
is the same thing. That is why carbs have accelerator pumps.

Paul Lamar
 
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