This is what the injector system will look like
when all four are assembled.
The fuel rail is welded out of 1/2 inch square steel
tubing. By connecting this system to the intake manifold
with pipe or tubing you have the flexibility of tuning the engine
for whatever RPM your PSRU ratio allows.

The plenum, holding the throttle body, can be fabricated
out of sheet aluminum. Any simple throttle body can be used.

Paul Lamar

This is the complete manifold set up. Four tubing or pipe
bends complete the system.

Paul Lamar

Can you shoot us the centerline spacing and OD of the inlets.  I'd like to
look at the K&N filter options for this setup.  The spacing between the
front and back pair is flexible?
Thx,
Mike

Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
13B in gestation mode

It is some what flexible as the injectors are connected
to the pipe bends with rubber couplings. (Or welded) Also the pipe
bends (2 inch inside radius) can be splayed slightly where 
they attach to the manifold casting.  Each injector 
tube is individually cast.  

Basically I have it
set up that a 1.9 OD pipe (2 inch OD tube can be used)  
is directly along side 1.67 OD pipe (1.75 tube can be used)
The groups of two are centered over the rotor housing.
About five inches center to center.
This gives the least amount of additional height over
the engine for the intake system. Necessary to fit some
cowls such as the KIS Cruiser.

Paul Lamar
 
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