Alex Madsen wrote:
I have been doing a lot of drawing this weekend for my manifold
design. I have been mainly working on a P-port design because it is the
least complicated and
has a large (relatively :) market potential.
There was concern that I had fuel injectors on the hot side of the
engine on my last design. I think that my current design should address
this concern while
allowing those that want to experiment with fuel injector placement
the ability to do so. Attached are picture of the design. The fuel
injector can be
conceivably placed at any location along the manifold runners. The
drawing show a single injector boss however double injector bosses are
possible. The fuel
injector boss currently sits at a 45 degree angle to the runners. I
plan to use high temperature flame retardant Garolite (fiberglass
composite) for the
injector boss. The injector bosses are attached to the CF runners with
epoxy at the desired location. The epoxy will also fill in any gaps.
The force trying
to dislodge the injectors, even during a backfire is relatively small
because of the small area of the injector hole that goes into the
runner. Injectors are
not attached to a fuel rail but rather an injector cap with NPT
threads for an AN T fitting. This allows easy customer configuration of
injector layout and
eliminates the bulk and custom machining of a fuel rail (of course if
you want to use fuel rails you could). The injector is retained by
the clamping force
of 2 bolts that run between the cap and boss.
The manifold runners will likely 2" ID and made of 2 ply carbon fiber
and high temperature epoxy. I have not yet determined what I will use
for as a form for
the CF. I am leaning towards wax but foam is also an option. The
current length of the runners is 21.5" and 25.7" including Jerry's
throttle body. The plenum
can face forwards or backwards and has a volume of 1.2 L. I am not
happy with the plenums shape and I will probably redesign it one of
these days.
As a side note to Jerry
How goes development of your throttle body? Is there any chance of
adding a flange to your TB? It would make attaching intake manifolds
much easer.