Hi, fellow rotary
enthusiasts....just a quick update on the progress of my new intake
system. I purchased the Austrailian 90 degree intake manifold from
Mazdatrix. I cut the top off, and brought it to my machinist friend,
who took a boring bar on a Bridgeport, and plunge-cut two nice
receptacles for my 90 degree aluminum bends. I purchased two 4"x12" 90
degree bends from Burns stainless, as well as two 45 degree bends. I
had them expand the end of the 4"x12" 90 degree tubing, so that the 45
would slide right into it. It fit nicely. The machinist is now making
an aluminum mounting plate with two holes in it that the two 45 degree
tubes will slide into, and it will be welded on the outside. This
mounting plate has four 5/16-18 threaded studs screwed into it, to
which my throttlebody will mount. He put it on his computer, so he can
duplicate this piece easily if needed. It is a very simple system, with
only one 90 degree bend to take the tubes over the top of the engine,
and then one 45 degree bend to position the throttlebody on the cold
side of the engine, similar to Paul Lamar's setup, with the exception
that the intake manifold goes from 4 into two right in the casting, so
only two intake runners are needed. Since the longer tube has been
expanded, I can slide the shorter 45 degree tubing in or out to fit
just where I need it, or for tuning the intake system. I should have
everything back from the machininst in a couple of days, at which point
I will post some pictures. I hope I described this sufficiently enough
to confuse everyone. The pictures will clarify everything much better
than my description, I'm sure.
Sure am sorry I was unable to
attend Shady Bend. Unfortunately, I had to work to pay for my third
manifold. Paul, the manifold collector, Conner.