I had to adjust a few things based on Don Dunbar's
dimensions.
This manifold layout is just about the only way to
get the
proper length for the runner tubes and still keep
everything
under the top of the cowl. We will shoot the fuel
in from the trumpet end. BTW the RX8 injectors are
much
easier to use for a p-port as they are only 5/8th of
an inch
in diameter. Two side by side can be on 3/4 inches
centers
rather than the one inch centers required by the
Nippon Denso (Mazda)
and MSD (GM) injectors.
Paul Lamar

Paul,

That drawing looks great. I've been trying to get the
dimensions of the cowl from Mustang Aero and the
Mustang group without success. The cowl itself is not
on any of the plans but the dimensions you have seem
to be the best so far.

The only problem we have is that directly behind the
firewall we have the main fuel tank. In this case, the
slide throttle is not a direct shot unless we can
build additional linkage.....

I'm also going to talk with James Aircraft and see if
they would be interested in adapting their Mustang II
cowl with their alternative cowl for this application.
I think your drawing should be a big help too.

Mark

I don't think a linkage would be a big problem.
You could use an ordinary push pull throttle cable
or a rocking beam. All we need is two inches of
slide travel. Move the throttle over and down to a center tunnel
on the right like an airliner or off to the left like
a J3 Piper Cub.

Let me know if Will James needs section curves to build a cowl.
I can do several iterations until every one is happy.
Also Will, any section curve spacing is possible. What ever you
need to build a buck.

Paul Lamar

Mark,  assuming your fuel tank is aluminum, you can install a tube
through it for the throttle.  It is done all the time on Tailwinds.
Also,  I have already built an intake similar to what you are
discussing with bell mouth injection.  The fuel rail will be complete
next week.  I will send a pic.  Maybe something there  you can use.
Jerry

P.S.  one man's opinion but I would not build an intake with[out] a filter.
That goes for ram air too.

I think Jerry means without a filter.

Paul Lamar

Yes that is what I intended.  I wonder if typos are a sign of mental
deterioration?  I seem to be making more and more.  Today I am  picking
up a reamer that I had ground to the finish  i.d. (.540/.545) of the
fuel injector bosses.  Five minutes more and the fuel rail will be
ready for welding.    Jerry



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