I recently read a mini dissertation regarding the differences between
the
13BT and the REW at http://my.engr.ucdavis.edu/~pko/13BTvs13BREW.html.

Here's a short clipping from the web page listing the differences
between the
two:

"While the intake ports are larger, the intake runners of these motors
are
still about the same size. The 13BT intake manifold has a surge tank
plenum
which is found to create too much pumping losses because of its large
volume.
The 13B-REW intake manifold is a "Dynamic Pressure Intake System" which
eliminated the surge plenum tank and has opposed-facing secondary intake

runners. This new design enhances intake flow by taking advantage of the

strong pressure waves inherant in rotary engines. The throttle bodies on
the
13BT are 3x45mm, while the 13B-REW are 1x45mm + 2x50mm."

After partially disassembling my Cosmo (13B RE) motor and comparing the
intake manifolds, I'm wondering if the RE UIM is going to suffer from
the
same sort of pumping loss inherent in the 13 BT design?   It too
features
what appears to be a surge tank plenium design. I'm questioning whether
it
would be beneficial to port my LIM from the REW motor and port match it
to
the Cosmo block instead of running the entire Cosmo intake system.   The

runners are quite a bit larger, volumous, than the FD's however, and
with the
large single turbo I am running, the increase in runner size throughout
could
allow more hp at lower boost levels, no? The FD LIM appears to have a
more
direct shot into the block ports however.   I know various tuners are
big
proponents of LIM modifications for additional hp.   Any thoughs
appreciated!
Michel
95RX7<<<

Paul, you might find this interesting. Have any thoughts? Maybe sell him
an intake manifold? Yeah!

Marc Wiese

I have thought about addressing the car market but not at this time. It 
would divert me from the task at hand. Getting the dyno working and testing
the prop. Part of getting the dyno working is getting my intake
system completed so I can use my turbo engine on the dyno.
 
Paul Lamar
 
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