Placing the injectors in a position where the fuel
can dribble down and flow into the engine is a bad idea.
Raw fuel in the rotary is a no no. It makes it very difficult
to start because of the overly rich mixture. 

Second it will wash the oil off the apex seal causing the engine
to lose compression. This is particularly bad situation
with the RX8 engine as there is no chance of pumping the raw fuel
out the exhaust port. Believe me as I know this first hand.

Best to have the injectors dribble (if they ever  dribble)
into the plenum chamber and then have an over board fuel drain
or a line returning the raw fuel to one of the tanks.

In fact it might be a good idea  to use this line with a one way 
valve as a fuel tank vent line. The high high pressure at high aircraft 
speeds in a non turbo engine will help feed fuel to the fuel pumps.

You also want a pressure release valve in the tank as you could
in theory blow the top off the tank if the pressure got above a few psi.
A 20 by 20 tank at one psi has a total force on the top of it
of 400 pounds. Don't use this idea with a turbo engine!!!!

Paul Lamar
 
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